{"title":"Physics \u0026 Motion – Pendulums, Gyroscopes and Stirling Engines","description":"\u003cp\u003eThe \u003cstrong\u003ePhysics \u0026amp; Motion\u003c\/strong\u003e collection from the Lab gathers objects that make the great laws of physics visible. The \u003cstrong\u003eNewton's cradle\u003c\/strong\u003e illustrates the conservation of energy, the \u003cstrong\u003esand pendulum\u003c\/strong\u003e traces patterns in the sand, the \u003cstrong\u003egyroscope\u003c\/strong\u003e defies gravity, and the \u003cstrong\u003eStirling engine\u003c\/strong\u003e transforms a simple temperature difference into motion.\u003c\/p\u003e\u003cp\u003eThese objects look great on a desk, a shelf, or a bookcase. They catch the eye, spark conversation, and make excellent gifts for the curious, engineers, and science enthusiasts.\u003c\/p\u003e\u003ch2\u003eWhat you will find here\u003c\/h2\u003e\u003cul\u003e\n\n\u003cli\u003eNewton's cradles and sand pendulums\u003c\/li\u003e\n\n\u003cli\u003eGyroscopes and precision spinning tops\u003c\/li\u003e\n\n\u003cli\u003eStirling engines, assembled or in build-your-own kits\u003c\/li\u003e\n\n\u003cli\u003eTensegrity sculptures that appear to float\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\u003cp\u003eExplore the other worlds of the \u003ca href=\"\/collections\/objets-scientifiques\"\u003eLab\u003c\/a\u003e.\u003c\/p\u003e\u003chr\u003e\u003ch2\u003eFAQ – Frequently Asked Questions\u003c\/h2\u003e\u003cdetails\u003e\u003csummary\u003eHow does a Stirling engine work?\u003c\/summary\u003e\u003cp\u003eIt exploits a temperature difference between its base and its top: the heated air expands, the cooled air contracts, and this cycle turns the flywheel. Placed on a hot cup, it starts by itself.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes the Newton's cradle stop?\u003c\/summary\u003e\u003cp\u003eYes, after a few dozen seconds, because friction and sound gradually dissipate the energy. You just need to relaunch a ball.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eAre these objects suitable for children?\u003c\/summary\u003e\u003cp\u003eThese are decorative and demonstration objects for adults and teenagers. Models with small parts or balls should be kept out of the reach of young children.\u003c\/p\u003e\u003c\/details\u003e","products":[{"product_id":"pendule-de-newton","title":"Mirror-finish Newton's cradle — MIRROR","description":"\u003cstyle\u003e\n.aa{font-family:Georgia,'Times New Roman',serif;color:#1A1A1A;line-height:1.7;font-size:15px;max-width:760px;margin:0 auto}\n.aa p{margin:0 0 1rem}\n.aa a{color:#185FA5;text-decoration:underline}\n.aa .aa-title{display:inline-block;border-bottom:2px solid #FAC775;padding-bottom:4px;font-size:16px;font-weight:600;margin:1.75rem 0 .5rem;letter-spacing:.3px;color:#1A1A1A}\n.aa .aa-badge{display:inline-block;font-size:11px;font-weight:700;letter-spacing:.5px;text-transform:uppercase;padding:3px 10px;border-radius:20px;margin:0 4px 4px 0;vertical-align:middle;font-family:Georgia,serif}\n.aa .aa-badge-or{background:#FAC775;color:#1A1A1A}\n.aa .aa-badge-brun{background:#5C3A1E;color:#FFF9E8}\n.aa 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class=\"aa\"\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eNewton's cradle\u003c\/strong\u003e — 5 fully \u003cstrong\u003emetal\u003c\/strong\u003e suspended balls on a \u003cstrong\u003emirrored base\u003c\/strong\u003e. Dimensions: \u003cstrong\u003e12.7 × 10 × 7.5 cm\u003c\/strong\u003e. Concretely illustrates the principles of \u003cstrong\u003ekinetic energy conservation\u003c\/strong\u003e and momentum transfer. An educational, decorative, and fascinating object — for all ages.\u003c\/p\u003e\n\n\u003cdiv class=\"aa-ben\"\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eConservation of kinetic energy\u003c\/span\u003e\u003cspan class=\"ds\"\u003eEach released ball transmits its energy through the stationary balls — the opposite ball rises at the same speed. Physics in its purest form, visible in real time.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003e5 fully metal balls\u003c\/span\u003e\u003cspan class=\"ds\"\u003eHeavy and precise metal balls, suspended on taut wires — for optimal energy transmission and smooth, lasting oscillation.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eMirrored base\u003c\/span\u003e\u003cspan class=\"ds\"\u003eReflects the movement of the balls and creates a captivating visual effect — the reflection visually doubles the animation and adds a premium decorative dimension.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003e12.7 × 10 × 7.5 cm\u003c\/span\u003e\u003cspan class=\"ds\"\u003eCompact size ideal for a desk, shelf, or display case — easy to handle and move for demonstrations.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eConcrete educational tool\u003c\/span\u003e\u003cspan class=\"ds\"\u003eIllustrates the principles of physics — conservation of energy, transfer of momentum, damping — in a fun and memorable way.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eUnusual science-decor gift\u003c\/span\u003e\u003cspan class=\"ds\"\u003eFor fans of physics, beautiful desk objects, or original decorative accessories — for kids and adults alike.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-des\"\u003e\n\n\u003cp class=\"t\"\u003e5 metal balls · mirrored base · 12.7 × 10 × 7.5 cm · kinetic energy conservation\u003c\/p\u003e\n\n\u003cdiv class=\"x\"\u003e\u003cp\u003e\nThe Newton's cradle is one of the most hypnotic desk objects in existence — and one of the most elegant to explain. Release one ball: the energy travels through the three stationary balls and propels the fifth to the same height. Release two balls: two rise on the opposite side. Release three: three respond. This isn't magic — it's Newton. The mirrored base visually doubles the motion and turns every oscillation into a decorative installation.\n\u003c\/p\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eContents\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-ben\" data-aa-done=\"1\"\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003e1 Newton's cradle\u003c\/span\u003e\u003cspan class=\"ds\"\u003e5 fully metal suspended balls\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eMirrored base\u003c\/span\u003e\u003cspan class=\"ds\"\u003eVisual effect · reflection of the balls\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003e12.7 × 10 × 7.5 cm\u003c\/span\u003e\u003cspan class=\"ds\"\u003eCompact format · place anywhere\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-sp\"\u003e\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eBalls\u003c\/td\u003e\n\n\u003ctd\u003e5 — fully metal\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eBase\u003c\/td\u003e\n\n\u003ctd\u003eMirrored\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\n\u003ctd\u003e12.7 × 10 × 7.5 cm (H × W × D)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\n\u003ctd\u003eMetal\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003ePhysics principle\u003c\/td\u003e\n\n\u003ctd\u003eConservation of kinetic energy and momentum\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eUsage\u003c\/td\u003e\n\n\u003ctd\u003eDecoration · education · office\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\u003c\/div\u003e\n\n\u003cdiv class=\"aa-tip\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eTo take it further:\u003c\/strong\u003e release 1 ball → 1 responds. Release 2 → 2 respond. Release 3 → 3 respond. Each configuration illustrates the conservation of momentum in a different way. The mirrored base allows you to observe the real movement and its reflection simultaneously — a doubly captivating effect during a demonstration.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-gift\"\u003e\u003cp\u003e\u003cstrong\u003eThe unusual desk object for physics enthusiasts:\u003c\/strong\u003e 5 metal balls, mirrored base, 12.7 × 10 × 7.5 cm. An \u003cstrong\u003eoriginal gift\u003c\/strong\u003e for a \u003cstrong\u003ebirthday, Christmas, office gift, or teacher gift\u003c\/strong\u003e — for any fan of science, decorative objects, or mechanical curiosities.\n\u003c\/p\u003e\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eFrequently asked questions\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-faq\"\u003e\n\n\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eWhat physical principle does the Newton's cradle illustrate?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eThe Newton's cradle illustrates the conservation of kinetic energy and momentum. When one ball strikes the others, energy is transmitted through the stationary balls and propels the opposite ball to the same height — and at the same speed — as the initial ball.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eWhat happens if you release multiple balls at once?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eIf you release 2 balls together, 2 rise on the opposite side. If you release 3, 3 respond. This illustrates that it is the number of balls (and therefore the momentum) that is conserved, not just the energy. Some balls gradually stop due to damping from friction and air resistance.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eIs it suitable for children?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eYes — the Newton's cradle is suitable for all ages. For children, it is a fun and fascinating object. For teenagers and adults, it is a concrete educational tool for understanding the principles of physics. The solid metal construction makes it robust and durable.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eHow long do the balls oscillate?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eThe cradle oscillates for several minutes before stopping due to natural damping (friction of the wires, air resistance). The more energy the balls are released with, the longer the oscillation lasts. The gradual damping itself is an interesting physical phenomenon to observe.\u003c\/div\u003e\u003c\/details\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"Quel principe physique illustre le pendule de Newton ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Conservation de l'énergie cinétique et du momentum. La bille frappée transmet son énergie à travers les billes immobiles et propulse la bille opposée à la même hauteur et vitesse.\"}},\n{\"@type\":\"Question\",\"name\":\"Que se passe-t-il si on lance plusieurs billes ensemble ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"2 billes lancées → 2 répondent. 3 lancées → 3 répondent. C'est la quantité de mouvement qui est conservée. L'amortissement progressif par friction et résistance de l'air est aussi visible.\"}},\n{\"@type\":\"Question\",\"name\":\"Adapté pour les enfants ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Oui — tous âges. Ludique pour les enfants, pédagogique pour ados et adultes. Métal robuste et durable.\"}},\n{\"@type\":\"Question\",\"name\":\"Combien de temps les billes oscillent-elles ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Plusieurs minutes avant amortissement naturel. 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0 1.5rem}\n.aa details.aa-q{border-bottom:1px solid #ebe5d6;padding:.85rem 0}\n.aa details.aa-q summary{font-size:14px;font-weight:700;list-style:none;padding-right:20px;position:relative;cursor:pointer}\n.aa details.aa-q summary::-webkit-details-marker{display:none}\n.aa details.aa-q summary::after{content:\"+\";position:absolute;right:0;top:0;color:#FAC775;font-size:18px;line-height:1}\n.aa details.aa-q[open] summary::after{content:\"\\2212\"}\n.aa .aa-a{font-size:13px;color:#3a3a3a;margin-top:.5rem}\n.aa .aa-a p{margin:0 0 .5rem}\n.aa .aa-pills{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:.5rem 0 1.5rem}\n.aa .aa-pill{background:#fff;border:1px solid #d8d2c4;border-radius:20px;padding:4px 14px;font-size:12px;font-weight:600;color:#1A1A1A}\n.aa .aa-pills-l{font-size:12px;color:#5C3A1E;font-weight:700;margin-right:4px}\n.aa .aa-links{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:1rem 0 1.5rem}\n.aa .aa-link{display:block;background:#fff;border:1px solid #ebe5d6;border-left:3px solid #FAC775;border-radius:6px;padding:.8rem 1rem;text-decoration:none;color:#1A1A1A}\n.aa .aa-link .lt{display:block;font-weight:700;font-size:14px;color:#5C3A1E}\n.aa .aa-link .ld{display:block;font-size:12px;color:#555;line-height:1.5}\n@media(max-width:600px){.aa .aa-vars,.aa .aa-ben,.aa .aa-links{grid-template-columns:1fr}}\n\u003c\/style\u003e\n\u003cdiv class=\"aa\"\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eSand Foucault Pendulum\u003c\/strong\u003e — a \u003cstrong\u003emetal\u003c\/strong\u003e bob oscillating above a basin of \u003cstrong\u003efine sand\u003c\/strong\u003e, on an \u003cstrong\u003eABS\u003c\/strong\u003e body. Dimensions: \u003cstrong\u003e39 × 16 × 14 cm\u003c\/strong\u003e. Traces complex and unique patterns with each oscillation — variable curve, amplitude, speed, and direction of rotation. An exceptional decorative object at the crossroads of science and art.\u003c\/p\u003e\n\n\u003cdiv class=\"aa-ben\"\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eUnique patterns with each oscillation\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe pendulum traces complex curves in the sand — each figure differs according to the amplitude, speed, and direction of rotation. No two patterns repeat exactly.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eInfinite variables\u003c\/span\u003e\u003cspan class=\"ds\"\u003ePlay with the shape of the curve, the amplitude, the speed, and the direction of rotation — the possibilities for geometric figures are literally endless.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eABS body + metal pendulum\u003c\/span\u003e\u003cspan class=\"ds\"\u003eSturdy and lightweight ABS structure with a metal pendulum for optimal inertia and smooth, prolonged oscillation.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003e39 × 16 × 14 cm\u003c\/span\u003e\u003cspan class=\"ds\"\u003eImposing dimensions that make it a centerpiece of home decor — it captures the eye and sparks admiration in any space.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eArt and science combined\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe Foucault pendulum is one of the most poetic scientific instruments — it transforms the physics of motion into ephemeral drawings in the sand.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eExceptional gift\u003c\/span\u003e\u003cspan class=\"ds\"\u003eFor lovers of science, art, and design who appreciate the blend of aesthetics and knowledge — an object unlike any other.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-des\"\u003e\n\n\u003cp class=\"t\"\u003eSand Foucault Pendulum — ABS · metal · fine sand · 39 × 16 × 14 cm · infinite patterns\u003c\/p\u003e\n\n\u003cdiv class=\"x\"\u003e\u003cp\u003e\nLaunch the pendulum. It swings over the basin of fine sand, and its tip begins to trace. First a line. Then the trajectory widens, curves, drawing an ellipse, a star, a spiral. Geometric figures appear gradually, with mathematical precision and unexpected beauty. Modify the amplitude, change the direction, vary the speed — and watch the physics of motion transform into ephemeral art with each swing. It is the principle of the Foucault pendulum, made visible and tangible on your desk.\n\u003c\/p\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-sp\"\u003e\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMaterials\u003c\/td\u003e\n\n\u003ctd\u003eABS (body) + Metal (pendulum) + Fine sand\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\n\u003ctd\u003e39 × 16 × 14 cm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003ePrinciple\u003c\/td\u003e\n\n\u003ctd\u003eFoucault pendulum — tracing patterns in the sand\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eVariables\u003c\/td\u003e\n\n\u003ctd\u003eCurve · amplitude · speed · direction of rotation\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003ePower source\u003c\/td\u003e\n\n\u003ctd\u003eNone — mechanical energy of the pendulum\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eUsage\u003c\/td\u003e\n\n\u003ctd\u003eDecoration · scientific demonstration · gift\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\u003c\/div\u003e\n\n\u003cdiv class=\"aa-tip\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eFor more complex patterns:\u003c\/strong\u003e start the pendulum with a slight twist (elliptical motion rather than linear) — the resulting figures will be Lissajous curves with remarkable geometric shapes. The greater the initial amplitude, the more extensive and complex the figures will be. Smooth the sand regularly between sessions to return to a blank surface.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-gift\"\u003e\u003cp\u003e\u003cstrong\u003eThe decorative object for curious minds:\u003c\/strong\u003e ABS + metal + sand, 39 × 16 × 14 cm, infinite geometric patterns. An \u003cstrong\u003eexceptional gift\u003c\/strong\u003e for a \u003cstrong\u003ebirthday, Christmas, office gift, or teacher gift\u003c\/strong\u003e — for any fan of science, kinetic art, and unique design.\n\u003c\/p\u003e\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-faq\"\u003e\n\n\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eHow does the Sand Foucault Pendulum work?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eThe metal pendulum is suspended above a basin of fine sand. Once set in motion, it swings freely and its tip traces patterns in the sand depending on its trajectory. By modifying the amplitude, speed, or direction of rotation at the start, you obtain different geometric figures — ellipses, stars, spirals.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eAre the patterns always the same?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eNo — each oscillation produces different patterns based on the launch parameters (amplitude, speed, direction, angle). The combinations are practically endless. Simply smooth the sand and launch the pendulum differently to get an entirely new figure.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eDoes it require a power supply?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eNo — the pendulum runs solely on the mechanical energy transmitted during the launch. No batteries, no cables. The oscillation naturally lasts for several minutes depending on the initial amplitude, after which the pendulum comes to a stop through natural damping.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eCan the sand be refilled or replaced?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eYes — the sand basin can be filled with any replacement fine sand if needed. Dry, fine, and evenly-sized sand will yield the best results for sharp, precise patterns.\u003c\/div\u003e\u003c\/details\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"Comment fonctionne le pendule de Foucault sable ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Balancier métal oscillant au-dessus d'un bassin de sable. Trace des motifs géométriques selon amplitude, vitesse et sens de rotation. Figures différentes à chaque lancement.\"}},\n{\"@type\":\"Question\",\"name\":\"Les motifs sont-ils toujours les mêmes ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Non — infinies combinaisons possibles selon les paramètres. Lissez le sable entre deux sessions pour repartir d'une surface vierge.\"}},\n{\"@type\":\"Question\",\"name\":\"Alimentation électrique requise ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Non — énergie mécanique uniquement. Aucune pile ni câble. Oscillation de plusieurs minutes par amortissement naturel.\"}},\n{\"@type\":\"Question\",\"name\":\"Peut-on remplacer le sable ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Oui — tout sable fin sec homogène convient. 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.aa-gift{background:linear-gradient(135deg,#FFFDF7,#FFF9E8);border:1px solid #FAC775;border-radius:10px;padding:1.3rem 1.5rem;margin:1.5rem 0}\n.aa .aa-gift h3{color:#5C3A1E;font-size:16px;margin:0 0 .6rem}\n.aa .aa-gift p{font-size:14px}\n.aa .aa-faq{margin:1rem 0 1.5rem}\n.aa details.aa-q{border-bottom:1px solid #ebe5d6;padding:.85rem 0}\n.aa details.aa-q summary{font-size:14px;font-weight:700;list-style:none;padding-right:20px;position:relative;cursor:pointer}\n.aa details.aa-q summary::-webkit-details-marker{display:none}\n.aa details.aa-q summary::after{content:\"+\";position:absolute;right:0;top:0;color:#FAC775;font-size:18px;line-height:1}\n.aa details.aa-q[open] summary::after{content:\"\\2212\"}\n.aa .aa-a{font-size:13px;color:#3a3a3a;margin-top:.5rem}\n.aa .aa-a p{margin:0 0 .5rem}\n.aa .aa-pills{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:.5rem 0 1.5rem}\n.aa .aa-pill{background:#fff;border:1px solid #d8d2c4;border-radius:20px;padding:4px 14px;font-size:12px;font-weight:600;color:#1A1A1A}\n.aa .aa-pills-l{font-size:12px;color:#5C3A1E;font-weight:700;margin-right:4px}\n.aa .aa-links{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:1rem 0 1.5rem}\n.aa .aa-link{display:block;background:#fff;border:1px solid #ebe5d6;border-left:3px solid #FAC775;border-radius:6px;padding:.8rem 1rem;text-decoration:none;color:#1A1A1A}\n.aa .aa-link .lt{display:block;font-weight:700;font-size:14px;color:#5C3A1E}\n.aa .aa-link .ld{display:block;font-size:12px;color:#555;line-height:1.5}\n@media(max-width:600px){.aa .aa-vars,.aa .aa-ben,.aa .aa-links{grid-template-columns:1fr}}\n\u003c\/style\u003e\n\u003cdiv class=\"aa\"\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eAnti-Gravity Metal Gyroscope\u003c\/strong\u003e — central rotor with smooth, stable rotation based on the \u003cstrong\u003econservation of angular momentum\u003c\/strong\u003e . Dimensions: \u003cstrong\u003eH 8.2 × W 6.2 cm\u003c\/strong\u003e. Available in \u003cstrong\u003e2 versions\u003c\/strong\u003e: Classic (stainless steel) and Premium (polished metal). \u003cstrong\u003eMetal stand included\u003c\/strong\u003e for display and scientific demonstrations.\u003c\/p\u003e\n\n\u003ch3 class=\"aa-title\"\u003e2 versions available\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-vars\"\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v light\" style=\"background:linear-gradient(135deg,#8A9BA8 0%,#C8D4DC 50%,#A0B0BC 100%)\"\u003eClassic Version\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eClassic Version\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003eStainless steel — optimal durability\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v dark\" style=\"background:linear-gradient(135deg,#B8860B 0%,#FFD700 50%,#DAA520 100%)\"\u003ePremium Edition\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003ePremium Edition\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003ePolished metal — elegant and refined finish\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-ben\"\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eConservation of angular momentum\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe rapidly spinning central rotor maintains its axis, stable regardless of the stand's tilt — making the gyroscopic effect visible and tangible.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eRobust central rotor\u003c\/span\u003e\u003cspan class=\"ds\"\u003eStable and smooth rotation mechanism — precision machining ensures a long and steady spin, an essential characteristic of a high-quality gyroscope.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eMetal stand included\u003c\/span\u003e\u003cspan class=\"ds\"\u003eDedicated stand for displaying the gyroscope or conducting scientific demonstrations — perfect for a desk or a classroom.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eNavigation, stabilization, space\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe gyroscopic principle is used in aeronautics, maritime navigation, and space exploration — this gyroscope illustrates real-world technologies.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eH 8.2 × W 6.2 cm — desk size\u003c\/span\u003e\u003cspan class=\"ds\"\u003eCompact and mountable format — for desks, shelves, or display cases. Lightweight and easy to transport for classroom demonstrations or on the go.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eScience \u0026amp; mechanics gift\u003c\/span\u003e\u003cspan class=\"ds\"\u003eFor physics enthusiasts, engineers, students, and curious minds of all ages — an educational and decorative object that has fascinated generations.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-des\"\u003e\n\n\u003cp class=\"t\"\u003eMetal gyroscope · H 8.2 × W 6.2 cm · 2 versions (stainless steel \/ polished metal) · stand included\u003c\/p\u003e\n\n\u003cdiv class=\"x\"\u003e\u003cp\u003e\nThe gyroscope is one of the most fascinating and counter-intuitive scientific instruments in existence. Spin the rotor: it resists any attempt to make it fall, keeps its axis stable against gravity, and maintains improbable tilts. It is the same principle that guides satellites, stabilizes airplanes, and steers submarines. In a Classic stainless steel or Premium polished metal version, with its dedicated stand — it belongs on your desk or in your physics class.\n\u003c\/p\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-sp\"\u003e\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eClassic Version\u003c\/td\u003e\n\n\u003ctd\u003eStainless steel — optimal durability\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003ePremium Version\u003c\/td\u003e\n\n\u003ctd\u003ePolished metal — elegant and refined finish\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\n\u003ctd\u003eHeight 8.2 cm × Width 6.2 cm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMechanism\u003c\/td\u003e\n\n\u003ctd\u003eCentral rotor — stable and smooth rotation\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003ePrinciple\u003c\/td\u003e\n\n\u003ctd\u003eConservation of angular momentum\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eIncluded accessory\u003c\/td\u003e\n\n\u003ctd\u003eMetal stand for display \/ demonstration\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eUsage\u003c\/td\u003e\n\n\u003ctd\u003eEducation · demonstration · collection · decoration\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\u003c\/div\u003e\n\n\u003cdiv class=\"aa-tip\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eFor optimal rotation:\u003c\/strong\u003e launch the rotor quickly with the provided cord or between your palms. The more energetic the launch, the longer and more stable the rotation will be. Place the spinning gyroscope on its stand to observe the full gyroscopic effect — it maintains its tilt against all expectations. The Premium edition, thanks to its finer bearings, generally offers longer and quieter rotations.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-gift\"\u003e\u003cp\u003e\u003cstrong\u003eThe science gift for all ages:\u003c\/strong\u003e metal, H 8.2 × W 6.2 cm, 2 versions, stand included. An \u003cstrong\u003eeducational and decorative gift\u003c\/strong\u003e for a \u003cstrong\u003ebirthday, Christmas, teacher's gift, or engineer's gift\u003c\/strong\u003e — for any enthusiast of physics, mechanics, and beautiful scientific objects.\n\u003c\/p\u003e\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-faq\"\u003e\n\n\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eWhat is the difference between the Classic version and the Premium Edition?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eThe Classic version is made of stainless steel — robust, durable, and resistant. The Premium Edition is made of polished metal with a more elegant and refined finish — it generally features finer bearings for longer and quieter rotations. The dimensions (H 8.2 × W 6.2 cm) and basic performance are identical.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eHow does the gyroscope's anti-gravity effect work?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eThe \"anti-gravity\" effect is based on the conservation of angular momentum. A rapidly spinning rotor resists any change in the orientation of its axis — this is gyroscopic force. Thus, the gyroscope can be balanced on a single point or held in a tilted position, defying intuitive expectations about gravity.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eWhat is the included metal stand for?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eThe stand allows for two uses: (1) Display — placing the gyroscope prominently on a desk or shelf as a decorative object. (2) Demonstration — performing physics experiments by placing the spinning gyroscope on the tip of the stand to observe the gyroscopic precession effect.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eIs it suitable for children?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eYes — but supervise young children. The metal gyroscope is an educational tool designed for all ages, but the metal parts require careful handling. Ideal for children 8-10 years and older and adults passionate about physics.\u003c\/div\u003e\u003c\/details\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"Différence entre version Classique et Premium ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Classique : acier inoxydable robuste. Premium : métal poli élégant, roulements plus fins pour rotations plus longues. Mêmes dimensions H8,2×L6,2 cm.\"}},\n{\"@type\":\"Question\",\"name\":\"Comment fonctionne l'effet anti-gravité ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Conservation du moment angulaire — le rotor en rotation rapide résiste aux changements d'axe (force gyroscopique). Permet équilibre sur un seul point et positions inclinées.\"}},\n{\"@type\":\"Question\",\"name\":\"À quoi sert le support en métal ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Exposition (décoration bureau) et démonstration (gyroscope en rotation sur la pointe pour observer la précession gyroscopique).\"}},\n{\"@type\":\"Question\",\"name\":\"Convient pour les enfants ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Oui avec supervision. Idéal dès 8-10 ans. Métal demande manipulation attentive.\"}}\n]}\n\u003c\/script\u003e","brand":"Atelier Atypique","offers":[{"title":"Classic","offer_id":49423509717315,"sku":"1005007174545511-A","price":49.9,"currency_code":"EUR","in_stock":true},{"title":"Premium","offer_id":49423509750083,"sku":"1005007174545511-B","price":59.9,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0231\/3365\/0991\/files\/Sea60f0b340824408adf1cc8d9b929edcZ.webp?v=1771645116"},{"product_id":"gyroscope-auto-equilibrant-anti-gravity-jouet-de-decompression-educatif","title":"Self-balancing anti-gravity gyroscope, educational toy — EQUILIBRIUM","description":"\u003cstyle\u003e\n.aa{font-family:Georgia,'Times New Roman',serif;color:#1A1A1A;line-height:1.7;font-size:15px;max-width:760px;margin:0 auto}\n.aa p{margin:0 0 1rem}\n.aa a{color:#185FA5;text-decoration:underline}\n.aa .aa-title{display:inline-block;border-bottom:2px solid 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h3{color:#5C3A1E;font-size:16px;margin:0 0 .6rem}\n.aa .aa-gift p{font-size:14px}\n.aa .aa-faq{margin:1rem 0 1.5rem}\n.aa details.aa-q{border-bottom:1px solid #ebe5d6;padding:.85rem 0}\n.aa details.aa-q summary{font-size:14px;font-weight:700;list-style:none;padding-right:20px;position:relative;cursor:pointer}\n.aa details.aa-q summary::-webkit-details-marker{display:none}\n.aa details.aa-q summary::after{content:\"+\";position:absolute;right:0;top:0;color:#FAC775;font-size:18px;line-height:1}\n.aa details.aa-q[open] summary::after{content:\"\\2212\"}\n.aa .aa-a{font-size:13px;color:#3a3a3a;margin-top:.5rem}\n.aa .aa-a p{margin:0 0 .5rem}\n.aa .aa-pills{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:.5rem 0 1.5rem}\n.aa .aa-pill{background:#fff;border:1px solid #d8d2c4;border-radius:20px;padding:4px 14px;font-size:12px;font-weight:600;color:#1A1A1A}\n.aa .aa-pills-l{font-size:12px;color:#5C3A1E;font-weight:700;margin-right:4px}\n.aa .aa-links{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:1rem 0 1.5rem}\n.aa .aa-link{display:block;background:#fff;border:1px solid #ebe5d6;border-left:3px solid #FAC775;border-radius:6px;padding:.8rem 1rem;text-decoration:none;color:#1A1A1A}\n.aa .aa-link .lt{display:block;font-weight:700;font-size:14px;color:#5C3A1E}\n.aa .aa-link .ld{display:block;font-size:12px;color:#555;line-height:1.5}\n@media(max-width:600px){.aa .aa-vars,.aa .aa-ben,.aa .aa-links{grid-template-columns:1fr}}\n\u003c\/style\u003e\n\u003cdiv class=\"aa\"\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eself-balancing anti-gravity gyroscope\u003c\/strong\u003e — high-quality metal, \u003cstrong\u003evacuum-plated\u003c\/strong\u003e finish, and precision engraving. Dimensions: \u003cstrong\u003e13.2 × 7 cm\u003c\/strong\u003e. Stable, smooth, and silent rotation. \u003cstrong\u003e5 colors\u003c\/strong\u003e: Royal Gold, Ebony Black, Glacial Silver, Imperial Copper, Rainbow Iridescent. Stress-relieving, educational, and decorative.\u003c\/p\u003e\n\n\u003ch3 class=\"aa-title\"\u003e5 colors available\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-vars\"\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v dark\" style=\"background:linear-gradient(135deg,#B8860B 0%,#FFD700 50%,#DAA520 100%)\"\u003eRoyal Gold\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eRoyal Gold\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003e\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v dark\" style=\"background:linear-gradient(135deg,#0a0a0a 0%,#2a2a2a 50%,#1a1a1a 100%)\"\u003eEbony Black\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eEbony Black\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003e\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v light\" style=\"background:linear-gradient(135deg,#C0C0C0 0%,#E8E8E8 50%,#A8A8A8 100%)\"\u003eGlacial Silver\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eGlacial Silver\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003e\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v dark\" style=\"background:linear-gradient(135deg,#8B4513 0%,#CD7F32 50%,#A0522D 100%)\"\u003eImperial Copper\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eImperial Copper\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003e\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v dark\" style=\"background:linear-gradient(135deg,#FF0080 0%,#7B00FF 25%,#00BFFF 50%,#00FF80 75%,#FFD700 100%)\"\u003eRainbow Iridescent\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eRainbow Iridescent\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003e\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-ben\"\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eStable and silent rotation\u003c\/span\u003e\u003cspan class=\"ds\"\u003eGyroscopic self-balancing principle — smooth and continuous rotation without any jitters or distracting noise. The silence of perfect physics.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eVacuum-plated finish\u003c\/span\u003e\u003cspan class=\"ds\"\u003eVacuum plating process providing exceptional shine and superior durability — combined with precision engraving for a perfectly polished surface.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eStress relief \u0026amp; decompression\u003c\/span\u003e\u003cspan class=\"ds\"\u003eWatching it spin is soothing — the hypnotic rotation and self-balancing movement have an immediate calming effect on stress and anxiety.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003ePrinciples of gravity and balance\u003c\/span\u003e\u003cspan class=\"ds\"\u003eProvides a concrete illustration of the laws of physics — gyroscopic effect, conservation of angular momentum, precession. A fascinating educational tool.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003e13.2 × 7 cm — high-quality metal\u003c\/span\u003e\u003cspan class=\"ds\"\u003eCompact and sturdy desk size — metal built to last, shock-resistant and retains its luster over time.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003e5 exclusive colors\u003c\/span\u003e\u003cspan class=\"ds\"\u003eRoyal Gold, Ebony Black, Glacial Silver, Imperial Copper, or Rainbow Iridescent (shifting with the light) — a gyroscope for every personality.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-des\"\u003e\n\n\u003cp class=\"t\"\u003eAnti-gravity gyroscope — polished metal · vacuum-plated · 13.2 × 7 cm · 5 colors\u003c\/p\u003e\n\n\u003cdiv class=\"x\"\u003e\u003cp\u003e\nSpin it. It rotates. It balances. It refuses to fall. The anti-gravity gyroscope harnesses the laws of classical mechanics to maintain its axis of rotation stable against any attempt to tip it over — it is the gyroscopic force visible to the naked eye. The vacuum-plated finish gives it the sparkle of a mechanical jewel. Royal Gold for majesty, Ebony Black for mystery, Rainbow Iridescent for the spectacle — choose your universe.\n\u003c\/p\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-sp\"\u003e\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\n\u003ctd\u003eHigh-quality metal\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eFinish\u003c\/td\u003e\n\n\u003ctd\u003eVacuum plating + precision engraving\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\n\u003ctd\u003e13.2 × 7 cm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eColors\u003c\/td\u003e\n\n\u003ctd\u003eRoyal Gold \/ Ebony Black \/ Glacial Silver \/ Imperial Copper \/ Rainbow Iridescent\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003ePrinciple\u003c\/td\u003e\n\n\u003ctd\u003eGyroscopic self-balancing\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eOperation\u003c\/td\u003e\n\n\u003ctd\u003eSilent — no vibration\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eUse\u003c\/td\u003e\n\n\u003ctd\u003eAnti-stress · educational · desk decor\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\u003c\/div\u003e\n\n\u003cdiv class=\"aa-tip\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eFor optimal rotation:\u003c\/strong\u003e launch the gyroscope by quickly spinning the outer ring between your palms. The more energetic the launch, the longer and more stable the rotation will be. Place it on a flat surface to observe the full gyroscopic effect — it maintains its initial inclination regardless of the movement of the support base.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-gift\"\u003e\u003cp\u003e\u003cstrong\u003eThe science \u0026amp; design gift for everyone:\u003c\/strong\u003e polished metal with vacuum-plated finish, 13.2 × 7 cm, 5 colors to choose from. A \u003cstrong\u003eunique gift\u003c\/strong\u003e for a \u003cstrong\u003ebirthday, Christmas, office present, or stress-relief gift\u003c\/strong\u003e — for children, adults, science enthusiasts, and collectors.\n\u003c\/p\u003e\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eFrequently asked questions\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-faq\"\u003e\n\n\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eWhat is the gyroscopic effect?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eThe gyroscopic effect is the tendency of a rapidly rotating body to resist any change in the orientation of its axis of rotation. This principle allows the gyroscope to maintain its stability and balance — and gives it that \"anti-gravity\" appearance that is so fascinating to observe.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eWhat is the difference between the 5 colors?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eThe 5 colors are obtained through vacuum plating — the base metal is the same, with different finishes: Royal Gold (shiny gold), Ebony Black (deep black), Glacial Silver (sparkling silver), Imperial Copper (vintage warm copper), Rainbow Iridescent (multicolored shifting with the light). All colors have the same dimensions and performance.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eIs it suitable for children?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eYes — suitable for both children and adults. For children, it is a fascinating educational object to learn about the principles of gravity and balance. For adults, it is stress-relieving and decorative. Please note that the small metal parts require supervision for young children.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eHow do I spin the gyroscope?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eQuickly spin the outer ring between your palms (as if lighting a fire with a stick) for 3 to 5 seconds. Release and observe the stable, silent rotation. To extend the rotation time, spin the ring again while the gyroscope is still spinning.\u003c\/div\u003e\u003c\/details\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"Qu'est-ce que l'effet gyroscopique ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Résistance d'un corps en rotation rapide à tout changement d'orientation de son axe. Maintient la stabilité et l'équilibre — l'effet 'anti-gravity' fascinant visible à l'œil nu.\"}},\n{\"@type\":\"Question\",\"name\":\"Différence entre les 5 coloris ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Même métal, finitions placage sous vide différentes : Or Royal, Noir Ébène, Argent Glacial, Cuivre Impérial, Irisé Arc-en-Ciel (multicolore changeant selon la lumière). Mêmes dimensions pour tous.\"}},\n{\"@type\":\"Question\",\"name\":\"Convient-il aux enfants ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Oui — enfants et adultes. Éducatif pour la physique, anti-stress pour adultes. Supervision recommandée pour les jeunes enfants.\"}},\n{\"@type\":\"Question\",\"name\":\"Comment lancer le gyroscope ?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Faire tourner l'anneau extérieur rapidement entre les paumes 3-5 secondes puis relâcher. Relancer pendant la rotation pour allonger la durée.\"}}\n]}\n\u003c\/script\u003e","brand":"Atelier Atypique","offers":[{"title":"Royal Gold","offer_id":49423622308163,"sku":"1005006352406821-A-gold","price":24.9,"currency_code":"EUR","in_stock":true},{"title":"Frozen Silver","offer_id":49423622177091,"sku":"1005006352406821-A-silver","price":24.9,"currency_code":"EUR","in_stock":true},{"title":"Black Ebony","offer_id":49423622209859,"sku":"1005006352406821-A-black","price":24.9,"currency_code":"EUR","in_stock":true},{"title":"Iridescent Rainbow","offer_id":49423622242627,"sku":"1005006352406821-A-Colorful","price":24.9,"currency_code":"EUR","in_stock":true},{"title":"Imperial 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.ld{display:block;font-size:12px;color:#555;line-height:1.5}\n@media(max-width:600px){.aa .aa-vars,.aa .aa-ben,.aa .aa-links{grid-template-columns:1fr}}\n\u003c\/style\u003e\n\u003cdiv class=\"aa\"\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eTensegrity Sculpture Anti-Gravity DIY\u003c\/strong\u003e set — a construction kit based on the effect of tension and balance that creates the illusion of a sculpture floating in mid-air. Height: \u003cstrong\u003e13 cm\u003c\/strong\u003e. Materials: \u003cstrong\u003edurable plastic\u003c\/strong\u003e. Tension chains included. Instructions provided. Educational, decorative, and captivating — for ages 8 and up.\u003c\/p\u003e\n\n\u003cdiv class=\"aa-ben\"\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eAnti-gravity effect through tensegrity\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe structure appears to float in mid-air — the principle of tensegrity (tension + integrity) keeps the blocks in apparent balance through the tension chains.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eComplete DIY kit\u003c\/span\u003e\u003cspan class=\"ds\"\u003eAll components included — blocks, plastic chains, and easy-to-follow instructions. No tools required, assembly accessible from age 8.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eTeaches physics through play\u003c\/span\u003e\u003cspan class=\"ds\"\u003eConcrete illustration of the principles of tension, balance, opposing forces, and self-supporting structures — a fun and memorable educational tool.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eIntriguing decorative object\u003c\/span\u003e\u003cspan class=\"ds\"\u003eOnce assembled, the sculpture becomes a modern and intriguing decorative piece — for a living room, office , or bedroom, it catches the eye and sparks questions.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eH13 cm — compact format\u003c\/span\u003e\u003cspan class=\"ds\"\u003eCompact 13 cm height — fits easily on a desk or shelf without taking up much space.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eScience \u0026amp; creativity gift\u003c\/span\u003e\u003cspan class=\"ds\"\u003eIdeal for children (8+), adults, physics enthusiasts, teachers, parents, and collectors of unique puzzles.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-des\"\u003e\n\n\u003cp class=\"t\"\u003eTensegrity — plastic · tension chains · H13 cm · DIY · visual anti-gravity\u003c\/p\u003e\n\n\u003cdiv class=\"x\"\u003e\u003cp\u003e\nTensegrity is one of the most counter-intuitive structural principles in physics: elements in compression (the blocks) held in balance solely by elements in tension (the chains) — without ever touching each other directly. The visual result is stunning: the structure appears to float, defy gravity, and hold together by miracle. This kit allows you to assemble this phenomenon with your own hands and understand its laws. Then, place it on your desk and watch your guests scratch their heads.\n\u003c\/p\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eKit contents\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-ben\" data-aa-done=\"1\"\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eSet of blocks\u003c\/span\u003e\u003cspan class=\"ds\"\u003eHigh-quality durable plastic\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eTension chains\u003c\/span\u003e\u003cspan class=\"ds\"\u003eMade of plastic — anti-gravity effect\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eInstructions\u003c\/span\u003e\u003cspan class=\"ds\"\u003eEasy to follow — quick assembly\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-sp\"\u003e\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\n\u003ctd\u003eHigh-quality durable plastic\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eAssembled height\u003c\/td\u003e\n\n\u003ctd\u003e13 cm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003ePrinciple\u003c\/td\u003e\n\n\u003ctd\u003eTensegrity — tension + compression\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eContents\u003c\/td\u003e\n\n\u003ctd\u003eBlocks + plastic chains + instructions\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eRecommended age\u003c\/td\u003e\n\n\u003ctd\u003e8 years and up\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eUsage\u003c\/td\u003e\n\n\u003ctd\u003eGame · education · decoration\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\u003c\/div\u003e\n\n\u003cdiv class=\"aa-tip\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat is tensegrity?\u003c\/strong\u003e The word \"tensegrity\" is a portmanteau of \"tensional\" and \"integrity.\" It refers to structures where elements in compression (the blocks) never touch each other directly — they are kept in balance solely by cables or tension chains. Invented by engineer Buckminster Fuller, this principle is used in architecture, biology (the human body is a tensegrity structure!), and the arts. This kit makes it visible and tangible.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-gift\"\u003e\u003cp\u003e\u003cstrong\u003eThe science gift for curious minds:\u003c\/strong\u003e durable plastic, H13 cm, tension chains, complete kit. An \u003cstrong\u003eoriginal gift\u003c\/strong\u003e for a \u003cstrong\u003ebirthday, Christmas, teacher gift, or child's gift\u003c\/strong\u003e — for any fan of physics, construction, and beautiful, intriguing decorative objects.\n\u003c\/p\u003e\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-faq\"\u003e\n\n\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eWhat is tensegrity and why does the sculpture seem to float?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eTensegrity is a structural principle where elements in compression (the blocks) are kept in balance solely by elements in tension (the chains), without ever touching each other directly. The human eye expects the bottom elements to support those at the top — tensegrity reverses this expectation and creates the illusion of levitation.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eIs it difficult to assemble?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eNo — the kit is designed to be accessible from age 8. The included instructions guide the assembly step-by-step. The main challenge is adjusting the tension chains to find the perfect balance — which is part of the learning experience.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eCan it be disassembled and reassembled?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eYes — the structure can be taken apart and reassembled as many times as you like. In fact, that is what makes it an excellent educational tool for understanding the principles of tension and balance by experimenting with different configurations.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eIs it suitable for interior decoration?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eYes — once assembled, the tensegrity sculpture becomes a modern and intriguing 13 cm high decorative piece. It fits perfectly on a desk, shelf, or coffee table and consistently becomes a conversation starter for visitors.\u003c\/div\u003e\u003c\/details\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Qu'est-ce que la tensegrité et pourquoi la sculpture semble-t-elle flotter ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"La tensegrité est un principe structural où des éléments en compression (les blocs) sont maintenus en équilibre uniquement par des éléments en tension (les chaînes), sans jamais se toucher directement. L'œil humain attend que les éléments du bas portent ceux du haut — la tensegrité inverse cette attente et crée l'illusion de lévitation.\"}}, {\"@type\": \"Question\", \"name\": \"Est-il difficile à assembler ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Non — le kit est conçu pour être accessible dès 8 ans. Les instructions incluses guident l'assemblage étape par étape. La difficulté principale est le réglage des chaînes de tension pour trouver l'équilibre parfait — ce qui fait partie de l'apprentissage et de l'expérience.\"}}, {\"@type\": \"Question\", \"name\": \"Peut-on le démonter et le remonter ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Oui — la structure peut être démontée et remontée autant de fois que souhaité. C'est d'ailleurs ce qui en fait un excellent support pédagogique pour comprendre les principes de tension et d'équilibre en expérimentant différentes configurations.\"}}, {\"@type\": \"Question\", \"name\": \"Convient-il pour la décoration intérieure ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Oui — une fois assemblée, la sculpture tensegrité devient une pièce décorative moderne et intrigante de 13 cm de hauteur. Elle trouve sa place sur un bureau, une étagère ou une table basse et devient systématiquement un sujet de conversation pour les visiteurs.\"}}]}\u003c\/script\u003e","brand":"Atelier Atypique","offers":[{"title":"Default Title","offer_id":49423690596675,"sku":"1005006379806877-grey","price":16.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0231\/3365\/0991\/files\/S6c45c86d0df74a95a7069db53f592fd3s.webp?v=1771645205"},{"product_id":"moteur-stirling-experience-educative-kit-a-monter-diy","title":"Educational Stirling engine assembly kit — KELVIN","description":"\u003cstyle\u003e\n.aa{font-family:Georgia,'Times New Roman',serif;color:#1A1A1A;line-height:1.7;font-size:15px;max-width:760px;margin:0 auto}\n.aa p{margin:0 0 1rem}\n.aa a{color:#185FA5;text-decoration:underline}\n.aa .aa-title{display:inline-block;border-bottom:2px solid #FAC775;padding-bottom:4px;font-size:16px;font-weight:600;margin:1.75rem 0 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solid #ebe5d6;border-left:3px solid #FAC775;border-radius:6px;padding:.8rem 1rem;text-decoration:none;color:#1A1A1A}\n.aa .aa-link .lt{display:block;font-weight:700;font-size:14px;color:#5C3A1E}\n.aa .aa-link .ld{display:block;font-size:12px;color:#555;line-height:1.5}\n@media(max-width:600px){.aa .aa-vars,.aa .aa-ben,.aa .aa-links{grid-template-columns:1fr}}\n\u003c\/style\u003e\n\u003cdiv class=\"aa\"\u003e\n\n\u003cp\u003eThe \u003cstrong\u003ebuild-it-yourself Stirling engine\u003c\/strong\u003e is a \u003cstrong\u003escientific demonstration kit\u003c\/strong\u003e designed for mechanics enthusiasts, engineering students, and hobbyists. Sold \u003cstrong\u003eas a set of spare parts to be assembled by yourself\u003c\/strong\u003e, it offers a complete educational experience in two stages: first, the \u003cstrong\u003epleasure of manual assembly\u003c\/strong\u003e (a deep understanding of its operation through piece-by-piece construction), and then the \u003cstrong\u003espectacle of its operation\u003c\/strong\u003e once the engine is complete. Based on the principle invented in \u003cstrong\u003e1816 by Robert Stirling\u003c\/strong\u003e, this model faithfully reproduces the classic architecture of historical steam engines: \u003cstrong\u003ehorizontal piston\u003c\/strong\u003e, vintage-style spoked \u003cstrong\u003eflywheel\u003c\/strong\u003e, and a robust \u003cstrong\u003emetal base\u003c\/strong\u003e. Once assembled and activated by an appropriate heat source, it becomes a particularly spectacular \u003cstrong\u003eliving demonstration of the principles of thermodynamics\u003c\/strong\u003e. Compact size of approximately \u003cstrong\u003e22 × 8 cm\u003c\/strong\u003e, ideal for display on a desk or shelf. An exceptional gift for those who love \u003cstrong\u003eunderstanding how things work\u003c\/strong\u003e. \u003cspan class=\"aa-badge aa-badge-or\"\u003eAssembly Kit\u003c\/span\u003e \u003cspan class=\"aa-badge aa-badge-or\"\u003eMechanical Demonstration\u003c\/span\u003e\u003c\/p\u003e\n\n\u003ch3 class=\"aa-title\"\u003eThe advantages of the build-it-yourself Stirling engine\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-ben\"\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eComplete assembly kit\u003c\/span\u003e\u003cspan class=\"ds\"\u003eAll parts included, the pleasure of manual assembly included.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eLearning by doing\u003c\/span\u003e\u003cspan class=\"ds\"\u003eUnderstand the operation by assembling the components.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eHistorical architecture\u003c\/span\u003e\u003cspan class=\"ds\"\u003eHorizontal piston + spoked flywheel, 1900s steam engine design.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eRobust metal base\u003c\/span\u003e\u003cspan class=\"ds\"\u003eStable platform for display and operation.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eCompact size 22 × 8 cm\u003c\/span\u003e\u003cspan class=\"ds\"\u003eEasily displayed on a desk, shelf, or in a display case.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eAn object of pride to exhibit\u003c\/span\u003e\u003cspan class=\"ds\"\u003eOnce assembled, it becomes a unique collector's item.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-mat\"\u003e\n\n\u003ch3\u003eThe principle of the Stirling engine\u003c\/h3\u003e\n\n\u003cp\u003eInvented in \u003cstrong\u003e1816 by the Scottish clergyman Robert Stirling\u003c\/strong\u003e, the Stirling engine is one of the most \u003cstrong\u003eelegant heat engines ever designed\u003c\/strong\u003e. Unlike modern internal combustion engines (gasoline, diesel) which operate by explosion inside the cylinder, the Stirling engine uses an \u003cstrong\u003eexternal heat source\u003c\/strong\u003e — flame, solar heat, steam — to alternately heat and cool a gas trapped inside a cylinder. The \u003cstrong\u003ecyclic expansion and contraction\u003c\/strong\u003e of this gas set in motion a piston connected to a \u003cstrong\u003eflywheel\u003c\/strong\u003e that maintains rotation and releases energy consistently.\u003c\/p\u003e\n\n\u003cp\u003eThis principle of \u003cstrong\u003eexternal thermal energy\u003c\/strong\u003e gives the Stirling engine several remarkable advantages: \u003cstrong\u003equiet\u003c\/strong\u003e (no explosions), \u003cstrong\u003eversatile\u003c\/strong\u003e (can run with any heat source), \u003cstrong\u003ereliable\u003c\/strong\u003e (few moving parts compared to a conventional piston engine). For these reasons, the Stirling engine is still used today in specific applications: \u003cstrong\u003esolar thermal generators\u003c\/strong\u003e, \u003cstrong\u003ecryogenics\u003c\/strong\u003e (reverse cycle), and \u003cstrong\u003eSwedish Gotland-class submarines\u003c\/strong\u003e which use Stirling engines for air-independent propulsion due to their exceptional acoustic stealth.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-des\"\u003e\n\n\u003cp class=\"t\"\u003eTHE SPIRIT OF THE ASSEMBLY KIT: UNDERSTANDING BY DOING\u003c\/p\u003e\n\n\u003cdiv class=\"x\"\u003e\u003cp\u003eThere are two ways to \u003cstrong\u003ediscover a Stirling engine\u003c\/strong\u003e. The first: buy an \u003cstrong\u003ealready assembled\u003c\/strong\u003e model, place it on a cup of hot water, and watch it turn. It is satisfying, but the mechanism remains mysterious — you observe the result without having penetrated the logic of how it works. The second: \u003cstrong\u003eassemble each part yourself\u003c\/strong\u003e, understand the role of each component (cylinder, piston, connecting rod, flywheel, support), solve the small technical challenges of assembly, and physically feel how thermal energy is transformed into mechanical movement. This second path is \u003cstrong\u003einfinitely more rewarding\u003c\/strong\u003e — it is the difference between \u003cstrong\u003ewatching a demonstration\u003c\/strong\u003e and \u003cstrong\u003ebecoming a mechanic yourself\u003c\/strong\u003e. For fans of modeling, mechanics, or simply those who love \u003cstrong\u003eunderstanding how things work\u003c\/strong\u003e through manual action, the assembly kit offers an experience that the assembled product can never replicate. Once finished, the engine becomes an \u003cstrong\u003eobject of personal pride\u003c\/strong\u003e to display — you will be able to say in all sincerity: \u003cem\u003e\"I built it myself.\"\u003c\/em\u003e\n\u003c\/p\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-steps\"\u003e\n\n\u003ch4\u003eThe 4-phase assembly process\u003c\/h4\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e1\u003c\/span\u003e\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003ePreparation and inventory\u003c\/strong\u003e — unpack and identify all the parts provided by following the manual's list. Prepare your tools (usually Phillips screwdrivers and hex keys are included). Work on a clean, flat surface, ideally with sufficient lighting.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e2\u003c\/span\u003e\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eAssembly of the frame and base\u003c\/strong\u003e — first assemble the structural elements (metal base, supports, fasteners). This step lays the stable foundation upon which the moving parts will be installed.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e3\u003c\/span\u003e\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eInstallation of the mechanism\u003c\/strong\u003e — assemble the cylinder, piston, connecting rod, and then the flywheel. This phase is the most delicate: adjustments must be precise so that the parts rotate freely without excessive friction. Take your time.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e4\u003c\/span\u003e\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eTesting and commissioning\u003c\/strong\u003e — once assembly is complete, check that the flywheel turns freely by hand (smooth rotation without stiff spots). Apply the recommended heat source according to the manual, give the wheel a slight push, and observe the engine find its autonomous rhythm.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-tip\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eAssembly tip:\u003c\/strong\u003e never force anything. If a part doesn't fit, it is likely \u003cstrong\u003eoriented incorrectly\u003c\/strong\u003e or the previous one is not positioned properly. Go back to the previous step before moving on. For \u003cstrong\u003escrews and bolts\u003c\/strong\u003e, tighten gradually and alternately (like a car wheel) to avoid deformation. \u003cstrong\u003eLubricate\u003c\/strong\u003e only the moving axes with a \u003cstrong\u003every small amount of dry graphite lubricant\u003c\/strong\u003e — never use oil, which would clog the mechanism. Once assembled, the engine must exhibit \u003cstrong\u003efree rotation of the flywheel\u003c\/strong\u003e without any perceptible friction when turned by hand — this is the essential criterion for the quality of your assembly.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-info\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eDifficulty level:\u003c\/strong\u003e this kit is intended for \u003cstrong\u003eteenagers and adults\u003c\/strong\u003e with some manual dexterity. Assembly generally takes \u003cstrong\u003e1 to 3 hours\u003c\/strong\u003e depending on your previous experience with technical modeling. No advanced skills are required — the provided manual guides every step. For \u003cstrong\u003ebeginners in modeling\u003c\/strong\u003e, plan for some quiet time and work without rushing. For \u003cstrong\u003eexperienced enthusiasts\u003c\/strong\u003e, the kit assembles easily and offers immediate satisfaction. This product is not suitable for children under 14 (small parts, precise adjustments required).\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-warn\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eBefore the first startup:\u003c\/strong\u003e check that all axes turn freely, that all screws are properly tightened (but not overly so), and that nothing is rubbing abnormally. The engine will not start if the assembly has a major defect — this is also a \u003cstrong\u003equality check\u003c\/strong\u003e of your work.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eOperating precautions:\u003c\/strong\u003e depending on the heat source used (alcohol lamp, lighter, tealight candle), observe \u003cstrong\u003estandard safety instructions\u003c\/strong\u003e for technical modeling: constant supervision during operation, keep away from flammable materials, place on a non-flammable surface under the engine. Keep out of reach of children during operation — the hot area can reach high temperatures.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eTechnical specifications\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-sp\"\u003e\u003ctable\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\n\u003ctd\u003eDIY Stirling engine kit\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eArchitecture\u003c\/td\u003e\n\n\u003ctd\u003eHorizontal piston engine with flywheel\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDelivery format\u003c\/td\u003e\n\n\u003ctd\u003eSpare parts with assembly instructions\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eAssembled dimensions\u003c\/td\u003e\n\n\u003ctd\u003eApprox. 22 × 8 cm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMain material\u003c\/td\u003e\n\n\u003ctd\u003eMetal for mechanical parts\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eFlywheel\u003c\/td\u003e\n\n\u003ctd\u003eVintage spoked style\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eAssembly time\u003c\/td\u003e\n\n\u003ctd\u003e1 to 3 hours depending on experience\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDifficulty level\u003c\/td\u003e\n\n\u003ctd\u003eIntermediate (teens and adults)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eHeat source\u003c\/td\u003e\n\n\u003ctd\u003ePer instructions (alcohol lamp or tealight candle)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eAudience\u003c\/td\u003e\n\n\u003ctd\u003eMechanics enthusiasts, modelers, engineering students\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eRecommended age\u003c\/td\u003e\n\n\u003ctd\u003e14 years and older\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\u003c\/div\u003e\n\n\u003cdiv class=\"aa-gift\"\u003e\n\n\u003ch3\u003eThe ideal gift for mechanics enthusiasts\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003ebuild-it-yourself Stirling engine kit\u003c\/strong\u003e is an \u003cstrong\u003eexceptional gift\u003c\/strong\u003e that combines \u003cstrong\u003eleisure activity\u003c\/strong\u003e (the assembly) and a \u003cstrong\u003escientific decor object\u003c\/strong\u003e (the result to display). It offers \u003cstrong\u003eseveral hours of engagement\u003c\/strong\u003e to the recipient, making it a particularly \u003cstrong\u003erewarding\u003c\/strong\u003e gift compared to a simple, pre-bought item. Ideal for \u003cstrong\u003emodeling enthusiasts\u003c\/strong\u003e, \u003cstrong\u003eengineers\u003c\/strong\u003e, \u003cstrong\u003eteenagers curious about science\u003c\/strong\u003e, \u003cstrong\u003ephysics teachers\u003c\/strong\u003e, \u003cstrong\u003eclockwork mechanics fans\u003c\/strong\u003e, or scale model lovers. Perfect gift for \u003cstrong\u003eFather's Day\u003c\/strong\u003e, \u003cstrong\u003ebirthdays\u003c\/strong\u003e, \u003cstrong\u003eChristmas\u003c\/strong\u003e, or as a \u003cstrong\u003egraduation gift\u003c\/strong\u003e in engineering. For recipients who prefer to avoid assembly, we also offer \u003cstrong\u003epre-assembled\u003c\/strong\u003e Stirling engines in our collection.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-faq\"\u003e\n\n\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eWhat is the difficulty level of the assembly?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eThe kit is intended for \u003cstrong\u003eteenagers (14 and up) and adults\u003c\/strong\u003e with some manual dexterity. Assembly generally takes \u003cstrong\u003e1 to 3 hours\u003c\/strong\u003e depending on your modeling experience. No advanced technical skills are required — the provided manual guides every step step-by-step. For beginners, plan for some quiet time without rushing. For experienced enthusiasts, the kit assembles easily and offers immediate satisfaction.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eWhat is a Stirling engine?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eThe Stirling engine is a \u003cstrong\u003eheat engine invented in 1816\u003c\/strong\u003e by Robert Stirling. Unlike modern internal combustion engines, it uses an \u003cstrong\u003eexternal heat source\u003c\/strong\u003e to alternate the heating and cooling of a gas trapped in a cylinder — the cyclic expansion and contraction set a piston connected to a flywheel into motion. Quiet, versatile, and reliable, it is still used today in certain applications (solar thermal generators, military submarines, cryogenics).\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eWhich heat source should be used?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eFollow the \u003cstrong\u003erecommendations in the manual provided\u003c\/strong\u003e with the kit. Most Stirling modeling engines run with an \u003cstrong\u003ealcohol lamp\u003c\/strong\u003e or a \u003cstrong\u003etealight candle\u003c\/strong\u003e placed under the heating chamber. Always follow standard safety rules: constant supervision, non-flammable surface, away from flammable materials. Never exceed the recommended temperature — excess heat can damage the components.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eIs the kit complete or do I need to buy extra parts?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eThe kit contains \u003cstrong\u003eall mechanical parts necessary\u003c\/strong\u003e for engine assembly. The tools needed for assembly (screwdrivers, keys) are generally included or are very basic (available in any household toolbox). Depending on the model, the \u003cstrong\u003eheat source\u003c\/strong\u003e (alcohol lamp or tealight) may need to be purchased separately — check the exact composition in the manual. No additional mechanical parts are required.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eWhat if the engine doesn't start after assembly?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eFirst, verify that the \u003cstrong\u003eflywheel turns freely\u003c\/strong\u003e by hand, without perceptible friction. If not, identify the friction points and adjust the assembly. Verify that \u003cstrong\u003eall screws are properly tightened\u003c\/strong\u003e but not overly so. Check the \u003cstrong\u003ecylinder airtightness\u003c\/strong\u003e (leaking gas prevents the engine from running). Lubricate the axes with a very small amount of \u003cstrong\u003edry graphite\u003c\/strong\u003e — never oil. If the problem persists, disassemble and reassemble the relevant step by carefully following the manual.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eDoes the kit make a good gift?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eIt is an \u003cstrong\u003eexceptional gift\u003c\/strong\u003e that combines leisure activity (several hours of assembly) and a scientific decor object (the result to display). Particularly rewarding because it offers a \u003cstrong\u003ecomplete experience\u003c\/strong\u003e, not just an object. Ideal for modeling fans, engineers, science-curious teens, and physics teachers. Perfect for \u003cstrong\u003eFather's Day\u003c\/strong\u003e, \u003cstrong\u003ebirthdays\u003c\/strong\u003e, \u003cstrong\u003eChristmas\u003c\/strong\u003e, or as a \u003cstrong\u003egraduation gift\u003c\/strong\u003e in engineering. If the recipient prefers to avoid assembly, opt for an already-assembled model.\u003c\/div\u003e\u003c\/details\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Quel est le niveau de difficulté du montage ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Le kit s'adresse aux adolescents (14 ans et plus) et adultes ayant une certaine aisance manuelle. Le montage prend généralement 1 à 3 heures selon votre expérience du modélisme. Aucune compétence technique avancée n'est requise — la notice fournie guide chaque étape pas à pas. Pour les débutants, prévoyez du temps tranquille sans précipitation. Pour les passionnés expérimentés, le kit se monte facilement et offre une satisfaction immédiate.\"}}, {\"@type\": \"Question\", \"name\": \"Qu'est-ce qu'un moteur Stirling ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Le moteur Stirling est un moteur thermique inventé en 1816 par Robert Stirling. Contrairement aux moteurs à combustion interne modernes, il utilise une source de chaleur externe pour faire alterner chauffe et refroidissement d'un gaz emprisonné dans un cylindre — la dilatation et contraction cycliques mettent en mouvement un piston relié à un volant d'inertie. Silencieux, polyvalent et fiable, il est encore utilisé aujourd'hui dans certaines applications (générateurs solaires thermiques, sous-marins militaires, cryogénie).\"}}, {\"@type\": \"Question\", \"name\": \"Quelle source de chaleur utiliser ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Suivez les recommandations de la notice fournie avec le kit. La plupart des moteurs Stirling de modélisme fonctionnent avec une lampe à alcool ou une bougie chauffe-plat placée sous la chambre de chauffe. Respectez toujours les consignes de sécurité standard : surveillance constante, surface non inflammable, éloignement des matières inflammables. Ne dépassez jamais la température recommandée — un excès de chaleur peut endommager les composants.\"}}, {\"@type\": \"Question\", \"name\": \"Le kit est-il complet ou faut-il acheter des pièces supplémentaires ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Le kit contient toutes les pièces mécaniques nécessaires à l'assemblage du moteur. Les outils nécessaires au montage (tournevis, clés) sont généralement fournis ou très basiques (disponibles dans toute boîte à outils domestique). Selon les modèles, la source de chaleur (lampe à alcool ou bougie chauffe-plat) peut être à acheter séparément — vérifiez la composition exacte dans la notice. Aucune pièce mécanique additionnelle n'est requise.\"}}, {\"@type\": \"Question\", \"name\": \"Que faire si le moteur ne démarre pas après montage ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Vérifiez d'abord que le volant d'inertie tourne librement à la main, sans frottement perceptible. Si ce n'est pas le cas, identifiez les points de friction et ajustez l'assemblage. Vérifiez que toutes les vis sont correctement serrées mais sans excès. Vérifiez l' étanchéité du cylindre (un gaz qui fuit empêche le moteur de fonctionner). Lubrifiez les axes avec une très petite quantité de graphite sec — jamais d'huile. Si le problème persiste, démontez et remontez l'étape concernée en suivant attentivement la notice.\"}}, {\"@type\": \"Question\", \"name\": \"Le kit fait-il un bon cadeau ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"C'est un cadeau d'exception qui combine activité de loisir (le montage de plusieurs heures) et objet déco scientifique (le résultat à exposer). Particulièrement valorisant car il offre une expérience complète , pas seulement un objet. Idéal pour passionnés de modélisme, ingénieurs, adolescents curieux de sciences, enseignants en physique. Parfait pour fête des pères , anniversaire , Noël , ou cadeau de fin d'études en ingénierie. Si le destinataire préfère éviter le montage, optez pour un modèle déjà assemblé.\"}}]}\u003c\/script\u003e","brand":"Atelier Atypique","offers":[{"title":"Default Title","offer_id":49423761342787,"sku":"1005005778664517-Default-Title","price":79.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0231\/3365\/0991\/files\/moteur-stirling-a-monter-soi-meme.jpg?v=1771645247"},{"product_id":"toupie-inception-effet-gyroscopique-laccessoire-nolan","title":"Precision metal gyroscope — NOLAN","description":"\u003cstyle\u003e\n.aa{font-family:Georgia,'Times New Roman',serif;color:#1A1A1A;line-height:1.7;font-size:15px;max-width:760px;margin:0 auto}\n.aa p{margin:0 0 1rem}\n.aa a{color:#185FA5;text-decoration:underline}\n.aa .aa-title{display:inline-block;border-bottom:2px solid #FAC775;padding-bottom:4px;font-size:16px;font-weight:600;margin:1.75rem 0 .5rem;letter-spacing:.3px;color:#1A1A1A}\n.aa 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solid #ebe5d6;border-left:3px solid #FAC775;border-radius:6px;padding:.8rem 1rem;text-decoration:none;color:#1A1A1A}\n.aa .aa-link .lt{display:block;font-weight:700;font-size:14px;color:#5C3A1E}\n.aa .aa-link .ld{display:block;font-size:12px;color:#555;line-height:1.5}\n@media(max-width:600px){.aa .aa-vars,.aa .aa-ben,.aa .aa-links{grid-template-columns:1fr}}\n\u003c\/style\u003e\n\u003cdiv class=\"aa\"\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eInception gyroscopic spinning top\u003c\/strong\u003e is a cult object for fans of Christopher Nolan's film — the one that, in the story, distinguishes dreams from reality. Made of high-quality metal, 2.8 × 3.2 cm, with smooth and prolonged rotation thanks to its optimized weight distribution. A collector's item, desk ornament, or gift for cinephiles — the top that poses the question.\u003c\/p\u003e\n\n\u003cdiv class=\"aa-ben\"\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eSmooth and prolonged rotation\u003c\/span\u003e\u003cspan class=\"ds\"\u003eOptimized weight distribution for a stable and hypnotic spin — will it stop?\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eHigh-quality metal\u003c\/span\u003e\u003cspan class=\"ds\"\u003ePrecision crafted — perfect balance and exceptional durability for repeated use\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eCompact size — 2.8 × 3.2 cm\u003c\/span\u003e\u003cspan class=\"ds\"\u003eFits in a pocket — always within reach on your desk or in your bag\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eInception cult object\u003c\/span\u003e\u003cspan class=\"ds\"\u003eInspired by the totem top from Christopher Nolan's film — for collectors and movie fans\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eStress relief \u0026amp; relaxation\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe soothing rotation captures attention and clears the mind — perfect for decompressing between meetings\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eGift for movie fans\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe item any Inception fan will recognize immediately — original, compact, and memorable\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eThe Inception totem top — the object that asks the question\u003c\/h3\u003e\n\n\u003cp\u003e\n      In Christopher Nolan's film (2010), the spinning top is Cobb's totem — if it stops, it's reality. If it spins indefinitely, it's a dream. The final scene is one of the most debated in cinema history. Owning this top means carrying that open-ended question with you.\n    \u003c\/p\u003e\n\n\u003ch3 class=\"aa-title\"\u003e3 ways to use the Inception top\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-ben\"\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eDesk accessory\u003c\/span\u003e\u003cspan class=\"ds\"\u003eA decorative piece for your desk — an object that sparks conversations and reveals your cinematic taste\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eStress relief\u003c\/span\u003e\u003cspan class=\"ds\"\u003eA few seconds of hypnotic rotation are enough to clear your mind — more effective than a fidget spinner\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eMovie collection\u003c\/span\u003e\u003cspan class=\"ds\"\u003eA collector's item for fans of Inception and Christopher Nolan — to display with other cult objects\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-tip\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow to spin the top:\u003c\/strong\u003e place it on a flat, smooth surface, pinch the tip between your thumb and index finger, and give it a quick spin with a sharp flick of your wrist. The smoother the surface (glass, marble, polished wood), the longer and smoother the rotation will be. Avoid rough surfaces that hinder rotation.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-sp\"\u003e\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eName\u003c\/td\u003e\n\n\u003ctd\u003eInception gyroscopic top\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\n\u003ctd\u003eHigh-quality metal\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\n\u003ctd\u003e2.8 × 3.2 cm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eEffect\u003c\/td\u003e\n\n\u003ctd\u003eGyroscopic — smooth and prolonged rotation\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eUsage\u003c\/td\u003e\n\n\u003ctd\u003eDecoration · Collection · Stress relief\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eInspiration\u003c\/td\u003e\n\n\u003ctd\u003eTotem top from the film Inception (Christopher Nolan, 2010)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\u003c\/div\u003e\n\n\u003cdiv class=\"aa-gift\"\u003e\u003cp\u003e\u003cstrong\u003eThe perfect gift for a movie fan:\u003c\/strong\u003e compact, original, and immediately recognizable to any Inception fan. Ideal for a \u003cstrong\u003ebirthday, Christmas, or just to treat\u003c\/strong\u003e someone who loves Christopher Nolan's cinema. A gift that always sparks a conversation about the final scene.\n  \u003c\/p\u003e\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eFrequently asked questions\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-faq\"\u003e\n\n\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eHow long does the top spin?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eThe rotation time depends on the initial force and the surface used. On a smooth surface (glass, marble), a good spin can last for several minutes. The high-quality metal and optimized weight distribution ensure a longer and more stable rotation than plastic or resin tops.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eIs the top faithful to the one in the Inception film?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eIt is inspired by Cobb's totem top from Christopher Nolan's Inception (2010) — featuring the same characteristic curves and recognizable silhouette. It is a collector's item inspired by the film, not an official licensed reproduction.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eOn what surface should I spin the top?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eThe best surfaces are smooth and flat — glass, marble, polished wood, or metal. Avoid rough surfaces (fabric, paper, raw wood) which create too much friction and reduce rotation time. A glass table or lacquered desk gives the best results.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eIs the top suitable as a gift for someone who hasn't seen Inception?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eYes — even without knowing the film, the metal gyroscopic top is a fascinating object for its hypnotic rotation and decorative appeal. It works very well as a stress-relief object or desk accessory. The film reference is a bonus for cinephiles, not a prerequisite to enjoy the object.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eDoes it stop or does it spin forever?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eIt stops — that is reality. But if you watch the final scene of Inception, you'll notice that Nolan never shows whether the top falls or not. This top leaves you to pose the same question with every rotation.\u003c\/div\u003e\u003c\/details\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Combien de temps la toupie gyroscopique Inception tourne-t-elle ?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Plusieurs minutes sur une surface lisse (verre, marbre) selon la force d'impulsion. Le métal haute qualité garantit une rotation plus longue qu'en plastique ou résine.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"La toupie est-elle fidèle à celle du film Inception ?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Inspirée de la toupie totem de Cobb dans Inception (Christopher Nolan, 2010) — mêmes courbes caractéristiques. Pièce de collection inspirée du film, non une reproduction officielle sous licence.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Sur quelle surface faire tourner la toupie Inception ?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Surfaces lisses et planes : verre, marbre, bois poli, métal. Évitez tissu, papier et bois brut qui freinent la rotation.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"La toupie convient-elle comme cadeau pour quelqu'un qui n'a pas vu Inception ?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Oui — objet fascinant pour sa rotation hypnotisante et son aspect décoratif, indépendamment du film. La référence cinéma est un plus pour les cinéphiles, pas un prérequis.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"La toupie Inception s'arrête-t-elle ou tourne-t-elle indéfiniment ?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Elle s'arrête — c'est la réalité. Mais comme dans la scène finale du film, elle vous laisse poser la question à chaque rotation.\"\n      }\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"Atelier Atypique","offers":[{"title":"Default Title","offer_id":49424008806723,"sku":"1005006793618332-Silver","price":19.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0231\/3365\/0991\/files\/S8d410d550e3f4d4da4b6fcd4f02614bas.webp?v=1771645313"},{"product_id":"pendule-de-newton-baton-sculpture-scientifique-et-fascinante","title":"Newton's cradle stick, scientific desk sculpture — PENDULA","description":"\u003cstyle\u003e\n.aa{font-family:Georgia,'Times New Roman',serif;color:#1A1A1A;line-height:1.7;font-size:15px;max-width:760px;margin:0 auto}\n.aa p{margin:0 0 1rem}\n.aa a{color:#185FA5;text-decoration:underline}\n.aa .aa-title{display:inline-block;border-bottom:2px solid #FAC775;padding-bottom:4px;font-size:16px;font-weight:600;margin:1.75rem 0 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0 1.5rem}\n.aa details.aa-q{border-bottom:1px solid #ebe5d6;padding:.85rem 0}\n.aa details.aa-q summary{font-size:14px;font-weight:700;list-style:none;padding-right:20px;position:relative;cursor:pointer}\n.aa details.aa-q summary::-webkit-details-marker{display:none}\n.aa details.aa-q summary::after{content:\"+\";position:absolute;right:0;top:0;color:#FAC775;font-size:18px;line-height:1}\n.aa details.aa-q[open] summary::after{content:\"\\2212\"}\n.aa .aa-a{font-size:13px;color:#3a3a3a;margin-top:.5rem}\n.aa .aa-a p{margin:0 0 .5rem}\n.aa .aa-pills{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:.5rem 0 1.5rem}\n.aa .aa-pill{background:#fff;border:1px solid #d8d2c4;border-radius:20px;padding:4px 14px;font-size:12px;font-weight:600;color:#1A1A1A}\n.aa .aa-pills-l{font-size:12px;color:#5C3A1E;font-weight:700;margin-right:4px}\n.aa .aa-links{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:1rem 0 1.5rem}\n.aa .aa-link{display:block;background:#fff;border:1px solid #ebe5d6;border-left:3px solid #FAC775;border-radius:6px;padding:.8rem 1rem;text-decoration:none;color:#1A1A1A}\n.aa .aa-link .lt{display:block;font-weight:700;font-size:14px;color:#5C3A1E}\n.aa .aa-link .ld{display:block;font-size:12px;color:#555;line-height:1.5}\n@media(max-width:600px){.aa .aa-vars,.aa .aa-ben,.aa .aa-links{grid-template-columns:1fr}}\n\u003c\/style\u003e\n\u003cdiv class=\"aa\"\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eNewton Rod Pendulum\u003c\/strong\u003e — a reimagined Newton’s cradle with \u003cstrong\u003e2 rotating rods\u003c\/strong\u003e suspended in perfect balance. Materials: \u003cstrong\u003eaviation-grade aluminum + ABS\u003c\/strong\u003e. Dimensions: \u003cstrong\u003e40 × 26 × 9 cm\u003c\/strong\u003e. Continuous, silent motion. Battery-operated (batteries not included). Elegant silver finish — a modern science and art decor object.\u003c\/p\u003e\n\n\u003cdiv class=\"aa-ben\"\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003e2 rods in harmonious motion\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe two rotating rods move in perfect harmony according to the principles of classical mechanics — a soothing and continuous visual display.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eAviation-grade aluminum + ABS\u003c\/span\u003e\u003cspan class=\"ds\"\u003eAviation-grade aluminum for lightweight durability, ABS plastic for a smooth, impact-resistant finish — high-quality contemporary materials.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eSilent and continuous motion\u003c\/span\u003e\u003cspan class=\"ds\"\u003eSilent and continuous animation — perfect for a workspace, living room, or waiting area without disturbing the atmosphere.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eBattery-operated\u003c\/span\u003e\u003cspan class=\"ds\"\u003eSimple installation with no wiring required — can be placed anywhere. Batteries are not included and should be purchased separately.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003e40 × 26 × 9 cm\u003c\/span\u003e\u003cspan class=\"ds\"\u003eCompact and elegant format that fits into any interior — office, living room, waiting room, or library.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eScience \u0026amp; design gift\u003c\/span\u003e\u003cspan class=\"ds\"\u003eFor fans of science, modern art, and minimalist decor — a curiosity piece that never fails to catch the eye.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-des\"\u003e\n\n\u003cp class=\"t\"\u003eNewton Rod — aviation-grade aluminum + ABS · 40 × 26 × 9 cm · 2 rods · battery-operated · silver finish\u003c\/p\u003e\n\n\u003cdiv class=\"x\"\u003e\u003cp\u003e\nThe classic Newton's pendulum transfers energy from ball to ball. This version reinvents the concept with two rotating rods suspended in continuous harmony — a fluid, silent, and almost hypnotic movement. Aviation-grade aluminum gives it aeronautical lightness and industrial strength. The silver finish provides the elegance of a premium desk accessory. Turn it on and let it enhance the atmosphere for you.\n\u003c\/p\u003e\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-sp\"\u003e\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMaterials\u003c\/td\u003e\n\n\u003ctd\u003eAviation-grade aluminum + ABS plastic\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\n\u003ctd\u003e40 × 26 × 9 cm (L × H × D)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eRods\u003c\/td\u003e\n\n\u003ctd\u003e2 — rotating, suspended in balance\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMotion\u003c\/td\u003e\n\n\u003ctd\u003eSilent and continuous\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eFinish\u003c\/td\u003e\n\n\u003ctd\u003eSilver — modern design\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\n\u003ctd\u003eBatteries (not included)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eUsage\u003c\/td\u003e\n\n\u003ctd\u003eOffice · living room · waiting room · decoration\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\u003c\/div\u003e\n\n\u003cdiv class=\"aa-warn\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eBatteries not included:\u003c\/strong\u003e ensure you have batteries at the time of purchase. Installation is simple and requires no wiring — the pendulum can be placed anywhere without needing an electrical outlet.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-tip\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eFor optimal effect:\u003c\/strong\u003e place the pendulum on a flat and stable surface, away from strong drafts that could disturb the movement of the rods. The silent animation works just as well day or night — ideal in an open office or conference room to create a zen atmosphere.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-gift\"\u003e\u003cp\u003e\u003cstrong\u003eThe gift for curious minds and modern decorators:\u003c\/strong\u003e aviation-grade aluminum + ABS, 40 × 26 × 9 cm, 2 rods, silver finish. A \u003cstrong\u003eunique object\u003c\/strong\u003e for a \u003cstrong\u003ebirthday, Christmas, colleague gift, or office gift\u003c\/strong\u003e — for any fan of physics, modern art, and minimalist design.\n\u003c\/p\u003e\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-faq\"\u003e\n\n\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eHow does it differ from a classic ball-based Newton's cradle?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eThe classic Newton's cradle transfers energy through collisions between metal balls. The Rod Pendulum reinvents this concept with two rotating rods that move in continuous harmony — creating a motion that is more fluid, silent, and focused on visual and decorative impact rather than demonstrating energy transfer.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eWhat type of batteries are required?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eThe exact type of battery depends on the model — please check the instructions provided with the product. Batteries are not included with the delivery. Installation is simple and requires no tools.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eIs the motion truly silent?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eYes — the motion of the rods is designed to be silent and free of disruptive vibrations. It is suitable for a work environment, waiting area, or living room without disturbing the atmosphere. This is one of its primary advantages over classic mechanical desk toys.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eHow long do the batteries last?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eBattery life depends on the type used and the duration of daily operation. For office use (8 hours\/day), standard alkaline batteries offer a lifespan of several weeks to several months. An ON\/OFF switch allows you to turn it off when not in use to preserve battery power.\u003c\/div\u003e\u003c\/details\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Quelle est la différence avec un pendule de Newton classique à billes ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Le pendule de Newton classique transmet l'énergie par choc entre des billes métalliques. Le Pendule Bâton réinvente ce concept avec deux bâtons rotatifs qui se déplacent en harmonie continue — un mouvement plus fluide, plus silencieux et davantage axé sur l'effet visuel et décoratif que sur la démonstration de transfert d'énergie.\"}}, {\"@type\": \"Question\", \"name\": \"Quels types de piles sont nécessaires ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Le type exact de piles dépend du modèle — vérifiez les indications dans la notice fournie avec le produit. Les piles ne sont pas incluses dans la livraison. L'installation est simple et ne nécessite aucun outil.\"}}, {\"@type\": \"Question\", \"name\": \"Le mouvement est-il vraiment silencieux ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Oui — le mouvement des bâtons est conçu pour être silencieux et sans vibration perturbatrice. Il convient à un environnement de travail, une salle d'attente ou un salon sans gêner l'atmosphère. C'est l'un de ses principaux avantages par rapport aux objets de bureau mécaniques classiques.\"}}, {\"@type\": \"Question\", \"name\": \"Combien de temps durent les piles ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"La durée de vie des piles dépend du type utilisé et de la durée d'utilisation quotidienne. Pour une utilisation au bureau (8h\/jour), des piles alcalines standard offrent une autonomie de plusieurs semaines à plusieurs mois. Un interrupteur ON\/OFF permet de l'éteindre lorsqu'il n'est pas utilisé pour préserver les piles.\"}}]}\u003c\/script\u003e","brand":"Atelier Atypique","offers":[{"title":"Default Title","offer_id":49424042230083,"sku":"1005007549906141-T-M","price":139.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0231\/3365\/0991\/files\/balance-de-newton-6.jpg?v=1771645330"},{"product_id":"moteur-stirling-bas-temperature-kit-diy-aldabert","title":"Low-Temperature Stirling Engine - ALDABERT DIY Kit","description":"\u003cstyle\u003e\n.aa-body{font-family:Georgia,serif;color:#1A1A1A;line-height:1.7;font-size:15px;max-width:760px;margin:0 auto;padding:1rem;background:#FAFAF7}\n.aa-body p{margin:0 0 1rem}\n.aa-intro{font-size:15px;margin-bottom:1.25rem}\n.aa-title{font-size:16px;font-weight:600;margin:1.75rem 0 .5rem;border-bottom:2px solid #FAC775;padding-bottom:4px;display:inline-block;letter-spacing:0.3px}\n.aa-sub{font-size:13px;color:#888;margin:0 0 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summary::after{content:\"−\"}\n.aa-a{font-size:13px;color:#3a3a3a;line-height:1.7;margin-top:.5rem}\n.aa-a strong{color:#1A1A1A}\n@media(max-width:480px){.aa-ben,.aa-inclus-grid{grid-template-columns:1fr!important}}\n\u003c\/style\u003e\n\n\u003cdiv class=\"aa-body\"\u003e\n\n\u003cp class=\"aa-intro\"\u003eThe \u003cstrong\u003eALDABERT-001 low-temperature Stirling engine\u003c\/strong\u003e is one of the most \u003cstrong\u003efascinating scientific demonstration objects to observe\u003c\/strong\u003e. Designed to operate with a \u003cstrong\u003esimple cup of hot water\u003c\/strong\u003e without any flame or combustion, it transforms a temperature difference as low as \u003cstrong\u003e25 °C\u003c\/strong\u003e into a self-sustaining rotational movement of the \u003cstrong\u003egolden wheel\u003c\/strong\u003e, up to \u003cstrong\u003e180 revolutions per minute\u003c\/strong\u003e. A true \u003cstrong\u003econdensation of applied thermodynamics\u003c\/strong\u003e displayed on a desk or shelf. Body made of \u003cstrong\u003estainless steel\u003c\/strong\u003e and \u003cstrong\u003epainted carbon steel\u003c\/strong\u003e, \u003cstrong\u003efrosted glass piston\u003c\/strong\u003e resistant to leaks and wear, compact size \u003cstrong\u003e12.2 × 10.2 × 10.2 cm\u003c\/strong\u003e for 250 g. Ideal for \u003cstrong\u003emechanics enthusiasts\u003c\/strong\u003e, \u003cstrong\u003ephysics teachers\u003c\/strong\u003e, \u003cstrong\u003eengineering students\u003c\/strong\u003e, \u003cstrong\u003ecollectors of scientific objects\u003c\/strong\u003e, or any lover of elegant objects that demonstrate fundamental physical principles. User manual included. \u003cspan class=\"aa-science-badge\"\u003eScientific Demonstration\u003c\/span\u003e \u003cspan class=\"aa-thermo-badge\"\u003eThermodynamics\u003c\/span\u003e\u003c\/p\u003e\n\n\u003ch3 class=\"aa-title\"\u003eALDABERT-001 Stirling engine advantages\u003c\/h3\u003e\n\u003cdiv class=\"aa-ben\"\u003e\n  \u003cdiv class=\"aa-b\"\u003e\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv class=\"tx\"\u003e\n\u003cdiv class=\"tt\"\u003eHot water cup is enough\u003c\/div\u003e\n\u003cdiv class=\"ds\"\u003eNo flame or alcohol lamp needed — safe and accessible.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"aa-b\"\u003e\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv class=\"tx\"\u003e\n\u003cdiv class=\"tt\"\u003e25 °C difference is sufficient\u003c\/div\u003e\n\u003cdiv class=\"ds\"\u003eOne of the most sensitive low-temperature Stirling engines.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"aa-b\"\u003e\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv class=\"tx\"\u003e\n\u003cdiv class=\"tt\"\u003eSelf-powered up to 180 rpm\u003c\/div\u003e\n\u003cdiv class=\"ds\"\u003eStart the wheel, and the engine takes over autonomously.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"aa-b\"\u003e\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv class=\"tx\"\u003e\n\u003cdiv class=\"tt\"\u003eFrosted glass piston\u003c\/div\u003e\n\u003cdiv class=\"ds\"\u003eQuality design, reduces steam leaks and wear.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"aa-b\"\u003e\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv class=\"tx\"\u003e\n\u003cdiv class=\"tt\"\u003eCompact 250 g format\u003c\/div\u003e\n\u003cdiv class=\"ds\"\u003e12.2 × 10.2 cm — can be displayed on a desk or shelf.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"aa-b\"\u003e\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv class=\"tx\"\u003e\n\u003cdiv class=\"tt\"\u003eElegant educational object\u003c\/div\u003e\n\u003cdiv class=\"ds\"\u003eGolden wheel + stainless steel + glass — accomplished scientific aesthetic.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-mat\"\u003e\n  \u003ch4\u003eHow does a Stirling engine work?\u003c\/h4\u003e\n  \u003cp\u003eThe \u003cstrong\u003eStirling engine\u003c\/strong\u003e is a heat engine invented in \u003cstrong\u003e1816 by the Scottish pastor Robert Stirling\u003c\/strong\u003e, which exploits the \u003cstrong\u003eexpansion and contraction of a gas\u003c\/strong\u003e under the effect of a temperature difference. Unlike internal combustion engines (gasoline, diesel), it requires \u003cstrong\u003eno explosion\u003c\/strong\u003e or internal combustion — the heat source can be entirely external and of any nature: flame, sun, friction, human heat, and in the case of the low-temperature model, a simple \u003cstrong\u003ecup of hot water\u003c\/strong\u003e.\u003c\/p\u003e\n  \u003cp\u003eThe principle is elegant: when the air trapped in the cylinder comes into contact with the \u003cstrong\u003ehot base\u003c\/strong\u003e, it \u003cstrong\u003eexpands\u003c\/strong\u003e and pushes the piston; when it is then moved to the \u003cstrong\u003ecold\u003c\/strong\u003e zone (top of the cylinder exposed to ambient air), it \u003cstrong\u003econtracts\u003c\/strong\u003e and pulls the piston in the opposite direction. This cycle repeats as long as the thermal difference is maintained, creating a continuous and autonomous rotational movement — fascinating to observe and particularly \u003cstrong\u003eeducational\u003c\/strong\u003e.\u003c\/p\u003e\n  \u003cp\u003eThe ALDABERT-001 is a \u003cstrong\u003e\"low-temperature\"\u003c\/strong\u003e model: while most commercial Stirling engines require a flame or an intense heat source, this model is calibrated to start with only a \u003cstrong\u003e25 °C difference\u003c\/strong\u003e between the base and ambient air — which makes it \u003cstrong\u003esafe\u003c\/strong\u003e, accessible to accompanied children, and usable daily without special equipment.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-des\"\u003e\n  \u003cdiv class=\"t\"\u003eTHE ALDABERT SPIRIT: THE BEAUTY OF THERMODYNAMICS\u003c\/div\u003e\n  \u003cdiv class=\"x\"\u003eFew objects \u003cstrong\u003eembody the fundamental principles of physics as elegantly\u003c\/strong\u003e as the Stirling engine. Placed on a cup, it becomes a \u003cstrong\u003eliving demonstration\u003c\/strong\u003e of the second law of thermodynamics: any temperature difference can produce mechanical work. This \u003cstrong\u003econceptual simplicity\u003c\/strong\u003e combined with the \u003cstrong\u003ecomplexity of observation\u003c\/strong\u003e (gears animating, piston oscillating, wheel gradually accelerating) makes the Stirling one of the \u003cstrong\u003emost powerful educational objects\u003c\/strong\u003e ever designed. Beyond its demonstrative function, the ALDABERT is also a \u003cstrong\u003ebeautiful object\u003c\/strong\u003e in its own right — polished stainless steel, golden accents, transparent glass revealing the mechanism. It looks equally impressive on an engineer's desk as it does in a clockwork enthusiast's library, a teacher's lab, or a medical practice's waiting room. An object that \u003cstrong\u003eprovokes conversation\u003c\/strong\u003e and reveals something profound about the physical world around us.\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-inclus\"\u003e\n  \u003ch4\u003e📦 Package Contents\u003c\/h4\u003e\n  \u003cdiv class=\"aa-inclus-grid\"\u003e\n    \u003cdiv class=\"aa-inclus-item\"\u003e\n      \u003cdiv class=\"ii-name\"\u003e⚙ ALDABERT-001 Stirling Engine\u003c\/div\u003e\n      \u003cdiv class=\"ii-desc\"\u003eAssembled, ready to use\u003c\/div\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"aa-inclus-item\"\u003e\n      \u003cdiv class=\"ii-name\"\u003e📖 User Manual\u003c\/div\u003e\n      \u003cdiv class=\"ii-desc\"\u003eComplete instructions in English\u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-steps\"\u003e\n  \u003ch4\u003eStarting the engine in 4 steps\u003c\/h4\u003e\n  \u003cdiv class=\"aa-step\"\u003e\n\u003cdiv class=\"aa-step-n\"\u003e1\u003c\/div\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\u003cstrong\u003ePrepare the hot source\u003c\/strong\u003e — fill a cup with very hot water (ideally 80-90 °C, just after boiling). The higher the temperature, the faster and longer the engine will run.\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"aa-step\"\u003e\n\u003cdiv class=\"aa-step-n\"\u003e2\u003c\/div\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\u003cstrong\u003ePlace the engine\u003c\/strong\u003e — place the base of the Stirling engine directly on the upper rim of the cup, ensuring the base is in good contact with the steam's heat. Wait 10-15 seconds for the base to heat up.\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"aa-step\"\u003e\n\u003cdiv class=\"aa-step-n\"\u003e3\u003c\/div\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\u003cstrong\u003eStart the wheel\u003c\/strong\u003e — give the golden wheel a light flick with your finger in a clockwise direction. The engine will take over in a few seconds and gradually accelerate to its cruising speed.\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003cdiv class=\"aa-step\"\u003e\n\u003cdiv class=\"aa-step-n\"\u003e4\u003c\/div\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\u003cstrong\u003eObserve\u003c\/strong\u003e — the engine runs autonomously as long as the temperature difference (minimum 25 °C) is maintained. Depending on the water temperature and ambient temperature, expect 15 to 30 minutes of operation with a cup of boiling water.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-tip\"\u003e\n  \u003cp\u003e\u003cstrong\u003eFor best performance:\u003c\/strong\u003e use a very hot cup of water (80-90 °C) just after boiling. Start the wheel in a \u003cstrong\u003eclockwise direction\u003c\/strong\u003e — this is the nominal operating direction. If the movement becomes irregular after several uses, apply a \u003cstrong\u003every small amount of dry graphite lubricant\u003c\/strong\u003e to the glass piston. You can also place the engine on other heat sources: \u003cstrong\u003ehot water bottle\u003c\/strong\u003e, \u003cstrong\u003eradiator\u003c\/strong\u003e, \u003cstrong\u003eslightly heated surface\u003c\/strong\u003e. Anecdote: in cold weather (ambient temperature below 12 °C), you can even run it with the \u003cstrong\u003eheat of your hand\u003c\/strong\u003e (37 °C) — the 25 °C difference is naturally achieved!\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-info\"\u003e\n  \u003cp\u003e\u003cstrong\u003eMaintenance:\u003c\/strong\u003e The engine does not require regular maintenance. Wipe the body with a soft, dry cloth to preserve the shine of the stainless steel and the finish of the golden wheel. Avoid prolonged contact with moisture. In case of friction or slowing, apply \u003cstrong\u003eonly dry graphite lubricant\u003c\/strong\u003e (available at model shops) to the glass piston. Store away from dust between uses.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-wrn\"\u003e\n  \u003cp\u003e\u003cstrong\u003eUsage precautions:\u003c\/strong\u003e Never use \u003cstrong\u003emineral or vegetable oil\u003c\/strong\u003e as a lubricant — oil would clog the mechanism and irreversibly reduce performance. Use exclusively \u003cstrong\u003edry graphite lubricant\u003c\/strong\u003e. The engine is not a toy for young children — it contains moving mechanical parts and comes into contact with a hot source. Adult supervision is recommended for educational use with children. Keep out of reach of very young children.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eTechnical specifications\u003c\/h3\u003e\n\u003cdiv class=\"aa-sp\"\u003e\n  \u003ctable\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eALDABERT-001\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eLow-temperature Stirling engine\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMaterials\u003c\/td\u003e\n\u003ctd\u003eStainless steel + painted carbon steel + glass\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003ePiston\u003c\/td\u003e\n\u003ctd\u003eFrosted glass, anti-leak and anti-wear\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWheel\u003c\/td\u003e\n\u003ctd\u003eGolden (gold finish)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e12.2 × 10.2 × 10.2 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e250 g\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMaximum speed\u003c\/td\u003e\n\u003ctd\u003e180 rpm\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMinimum temperature difference\u003c\/td\u003e\n\u003ctd\u003e25 °C (base vs ambient air)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eHeat source\u003c\/td\u003e\n\u003ctd\u003eCup of hot water, hot water bottle, radiator (no flame required)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eRecommended lubricant\u003c\/td\u003e\n\u003ctd\u003eDry graphite only (never oil)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eManual\u003c\/td\u003e\n\u003ctd\u003eIncluded, in English\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-gift\"\u003e\n  \u003ch4\u003eThe ultimate thermodynamic gift\u003c\/h4\u003e\n  \u003cp\u003eThe \u003cstrong\u003eALDABERT-001 Stirling engine\u003c\/strong\u003e is an \u003cstrong\u003eoriginal and memorable gift\u003c\/strong\u003e that stands out from the crowd. It combines aesthetic elegance (stainless steel, glass, golden wheel), \u003cstrong\u003eeducational dimension\u003c\/strong\u003e (a living demonstration of thermodynamic principles), and an \u003cstrong\u003einteractive character\u003c\/strong\u003e (the object actually works and fascinates with every use). Ideal for a science enthusiast's \u003cstrong\u003ebirthday\u003c\/strong\u003e, \u003cstrong\u003eFather's Day\u003c\/strong\u003e, \u003cstrong\u003eChristmas\u003c\/strong\u003e, a \u003cstrong\u003eteacher's gift\u003c\/strong\u003e in physics or engineering, a \u003cstrong\u003ethank-you gift\u003c\/strong\u003e for a professor, a \u003cstrong\u003eprofessional promotion gift\u003c\/strong\u003e for an engineer, or a \u003cstrong\u003eretirement gift\u003c\/strong\u003e. Particularly suitable for \u003cstrong\u003eteachers\u003c\/strong\u003e, \u003cstrong\u003eengineering students\u003c\/strong\u003e, \u003cstrong\u003eengineers\u003c\/strong\u003e, \u003cstrong\u003ecollectors of scientific objects\u003c\/strong\u003e, \u003cstrong\u003eclockwork mechanics enthusiasts\u003c\/strong\u003e, or simply people \u003cstrong\u003ecurious about how the world works\u003c\/strong\u003e. A gift like no other.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdiv class=\"aa-faq\"\u003e\n  \u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eWhy is this engine called \"low-temperature\"?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eMost commercial Stirling engines require a \u003cstrong\u003eflame\u003c\/strong\u003e or an intense heat source (alcohol lamp, candle). The \u003cstrong\u003eALDABERT-001\u003c\/strong\u003e model is designed to operate with only a \u003cstrong\u003e25 °C difference\u003c\/strong\u003e between the hot base and ambient air — a simple cup of hot water is enough. This makes it \u003cstrong\u003esafe\u003c\/strong\u003e, accessible for use with accompanied children, and usable daily without special equipment.\u003c\/div\u003e\u003c\/details\u003e\n  \u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eHow do I start the Stirling engine?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003ePlace the engine on a cup of \u003cstrong\u003ehot water\u003c\/strong\u003e (ideally 80-90 °C). Wait 10-15 seconds for the base to heat up, then give the golden wheel a \u003cstrong\u003elight flick with your finger\u003c\/strong\u003e in a clockwise direction. The engine will take over and run autonomously as long as the temperature difference is maintained (usually 15 to 30 minutes with a cup of boiling water).\u003c\/div\u003e\u003c\/details\u003e\n  \u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eWhat if the engine runs slowly or stops?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eFirst, check that the \u003cstrong\u003etemperature difference is sufficient\u003c\/strong\u003e (minimum 25 °C) — use a hotter cup or replace the water if it has cooled. If the movement remains irregular despite good heat, apply a \u003cstrong\u003every small amount of dry graphite lubricant\u003c\/strong\u003e to the glass piston. \u003cstrong\u003eNever use oil\u003c\/strong\u003e — mineral or vegetable — as it would clog the mechanism and irreversibly reduce performance.\u003c\/div\u003e\u003c\/details\u003e\n  \u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eCan it be used with other heat sources?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eYes — \u003cstrong\u003eany flat surface\u003c\/strong\u003e providing a 25 °C difference works: \u003cstrong\u003ehot water cup\u003c\/strong\u003e, \u003cstrong\u003eradiator\u003c\/strong\u003e, \u003cstrong\u003ehot water bottle\u003c\/strong\u003e, \u003cstrong\u003eslightly heated surface\u003c\/strong\u003e (without direct flame). You can even place it in the \u003cstrong\u003epalm of your hand\u003c\/strong\u003e (human body 37 °C) if the ambient temperature is below 12 °C — the difference is then enough to make it run. This is a spectacular demonstration of the engine's sensitivity.\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e\u003c\/details\u003e\n  \u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eIs the engine suitable for educational use in the classroom?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eAbsolutely — it's even one of its primary uses. The Stirling engine is the \u003cstrong\u003eideal teaching tool\u003c\/strong\u003e for illustrating the principles of thermodynamics in the classroom (middle school, high school, university), thanks to its safety (no flame), its reliable startup, and its \u003cstrong\u003espectacular yet quiet\u003c\/strong\u003e operation. Several physics teachers use this type of engine as a teaching aid for the second law of thermodynamics or the Carnot cycle. Adult supervision is recommended for younger students.\u003c\/div\u003e\u003c\/details\u003e\n  \u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eDoes the engine make a good gift?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eIt's an \u003cstrong\u003eoriginal and memorable gift\u003c\/strong\u003e that combines aesthetic elegance, educational value, and interactive character. Ideal for the \u003cstrong\u003ebirthday\u003c\/strong\u003e of a science enthusiast, \u003cstrong\u003eFather's Day\u003c\/strong\u003e, \u003cstrong\u003eChristmas\u003c\/strong\u003e, a \u003cstrong\u003eteacher's gift\u003c\/strong\u003e, a \u003cstrong\u003eprofessional promotion gift\u003c\/strong\u003e, or a \u003cstrong\u003eretirement gift\u003c\/strong\u003e. Particularly appreciated by teachers, engineering students, engineers, collectors of scientific objects, mechanics enthusiasts, or simply people curious about how the world works.\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[\n{\"@type\":\"Question\",\"name\":\"Why is this engine called low temperature?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It operates with only a 25°C difference between the hot base and the ambient air. A simple cup of hot water is enough; no flame is required. Safe and accessible for use with accompanied children.\"}},\n{\"@type\":\"Question\",\"name\":\"How to start the ALDABERT-001 Stirling engine?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Place it on a cup of hot water (80-90°C), wait 10-15 seconds, then give the golden wheel a light clockwise flick with your finger. It runs autonomously as long as the thermal difference is maintained (15-30 minutes).\"}},\n{\"@type\":\"Question\",\"name\":\"What to do if the engine runs slowly?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Check the temperature difference (min 25°C), use a hotter cup. If it's irregular despite good heat, apply dry graphite lubricant to the piston. Never use oil, which would clog the mechanism.\"}},\n{\"@type\":\"Question\",\"name\":\"What other heat sources can be used?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Any source providing a 25°C difference: cup, radiator, hot water bottle, heated surface. Even the palm of the hand (37°C) if the ambient temperature is below 12°C - a spectacular demonstration of the engine's sensitivity.\"}},\n{\"@type\":\"Question\",\"name\":\"Is the engine suitable for educational use?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Absolutely, it is a preferred use. An ideal educational object to illustrate thermodynamics in class (middle school, high school, university), thanks to its flameless safety, reliability, and spectacular operation.\"}},\n{\"@type\":\"Question\",\"name\":\"Does the engine make a good gift?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"An original gift combining aesthetic elegance, educational dimension, and interactive character. Ideal for a science enthusiast's birthday, Father's Day, Christmas, a teacher's gift, professional promotion, or retirement.\"}}\n]}\n\u003c\/script\u003e\n\n\u003c\/div\u003e","brand":"Atelier Atypique","offers":[{"title":"Default Title","offer_id":49424117694787,"sku":"4000717393779-style-1-CHINA","price":79.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0231\/3365\/0991\/files\/moteur-stirling-basse-temperature.jpg?v=1771645370"},{"product_id":"toupie-de-bureau-levitation-visuelle-en-alliage-de-zinc-axiome","title":"Zinc alloy visual levitation desk spinner — AXIOM","description":"\u003cstyle\u003e\n.aa{font-family:Georgia,'Times New Roman',serif;color:#1A1A1A;line-height:1.7;font-size:15px;max-width:760px;margin:0 auto}\n.aa p{margin:0 0 1rem}\n.aa a{color:#185FA5;text-decoration:underline}\n.aa .aa-title{display:inline-block;border-bottom:2px solid #FAC775;padding-bottom:4px;font-size:16px;font-weight:600;margin:1.75rem 0 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0 1.5rem}\n.aa details.aa-q{border-bottom:1px solid #ebe5d6;padding:.85rem 0}\n.aa details.aa-q summary{font-size:14px;font-weight:700;list-style:none;padding-right:20px;position:relative;cursor:pointer}\n.aa details.aa-q summary::-webkit-details-marker{display:none}\n.aa details.aa-q summary::after{content:\"+\";position:absolute;right:0;top:0;color:#FAC775;font-size:18px;line-height:1}\n.aa details.aa-q[open] summary::after{content:\"\\2212\"}\n.aa .aa-a{font-size:13px;color:#3a3a3a;margin-top:.5rem}\n.aa .aa-a p{margin:0 0 .5rem}\n@media(max-width:600px){.aa .aa-vars,.aa .aa-ben{grid-template-columns:1fr}}\n\u003c\/style\u003e\n\u003cdiv class=\"aa\"\u003e\n\n\u003cp\u003e\u003cspan class=\"aa-badge aa-badge-noir\"\u003eZinc alloy\u003c\/span\u003e \u003cspan class=\"aa-badge aa-badge-bleu\"\u003eOptical illusion\u003c\/span\u003e The \u003cstrong\u003eAXIOME desktop spinning top\u003c\/strong\u003e is one of those objects you place on your table for a moment and then cannot take your eyes off. Rising from a \u003cstrong\u003ecylindrical base\u003c\/strong\u003e is an \u003cstrong\u003eS-shaped sculpted ribbon\u003c\/strong\u003e, and at its summit, a \u003cstrong\u003emetallic sphere\u003c\/strong\u003e begins to spin in equilibrium, so quickly and smoothly that it appears to \u003cstrong\u003efloat in mid-air\u003c\/strong\u003e. This \u003cstrong\u003evisual levitation\u003c\/strong\u003e uses neither batteries nor electronics: only the momentum you provide with your fingertips and the laws of rotational mechanics. Made of \u003cstrong\u003ezinc alloy\u003c\/strong\u003e, which is dense and pleasant to hold, the piece is available in \u003cstrong\u003etwo sizes\u003c\/strong\u003e — 6.5 cm and 7.7 cm in height — and in \u003cstrong\u003enine color combinations\u003c\/strong\u003e for the body and ball: gray, silver, gold, or black, with a silver, gold, rose gold, or copper sphere. Both an anti-stress object, a scientific curiosity, and a small contemporary sculpture, AXIOME naturally finds its place next to a keyboard, on a bookshelf, or on an executive desk, where it almost always sparks the same question: how does it stay up?\u003c\/p\u003e\n\n\u003ch3 class=\"aa-title\"\u003eThe nine available finishes\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-vars\"\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v dark\" style=\"background: #6E6E6E;\"\u003eGRAY · SILVER BALL\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eSmall (6.5 cm) – Gray, silver ball\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003eSize 6.5 cm, gray body, silver sphere\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v light\" style=\"background: #9A9A9A;\"\u003eSILVER · SILVER BALL\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eSmall (6.5 cm) – Silver, silver ball\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003eSize 6.5 cm, bright monochromatic silver\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v dark\" style=\"background: linear-gradient(135deg,#6E6E6E 0%,#6E6E6E 60%,#E8B4C0 100%);\"\u003eGRAY · ROSE GOLD BALL\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eSmall (6.5 cm) – Gray, rose gold ball\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003eSize 6.5 cm, gray body, rose gold sphere\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v light\" style=\"background: #C8A84B;\"\u003eGOLD · SILVER BALL\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eSmall (6.5 cm) – Gold, silver ball\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003eSize 6.5 cm, gold body, silver sphere\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v dark\" style=\"background: #1A1A1A;\"\u003eBLACK · SILVER BALL\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eSmall (6.5 cm) – Black, silver ball\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003eSize 6.5 cm, black body, silver sphere\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v light\" style=\"background: linear-gradient(135deg,#9A9A9A 0%,#9A9A9A 60%,#C8A84B 100%);\"\u003eSILVER · GOLD BALL\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eSmall (6.5 cm) – Silver, gold ball\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003eSize 6.5 cm, silver body, gold sphere\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v dark\" style=\"background: #1A1A1A;\"\u003eBLACK · 7.7 CM\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eLarge (7.7 cm) – Black, silver ball\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003eLarge size, black body, silver sphere\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v light\" style=\"background: linear-gradient(135deg,#9A9A9A 0%,#9A9A9A 60%,#C8A84B 100%);\"\u003eSILVER · 7.7 CM\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eLarge (7.7 cm) – Silver, gold ball\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003eLarge size, silver body, gold sphere\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v dark\" style=\"background: linear-gradient(135deg,#6E6E6E 0%,#6E6E6E 60%,#8B5E2A 100%);\"\u003eGRAY · 7.7 CM\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eLarge (7.7 cm) – Gray, copper ball\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003eLarge size, gray body, copper sphere\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-mat\"\u003e\n\n\u003ch3\u003eThe physics behind the visual levitation\u003c\/h3\u003e\n\n\u003cp\u003eA sphere spinning rapidly on a tiny contact point obeys the same principle as a spinning top or a gyroscope: \u003cstrong\u003econservation of angular momentum\u003c\/strong\u003e. As long as the rotation is fast, the sphere's axis tends to maintain its orientation and resists small disturbances; the object remains in balance where, if stationary, it would immediately fall. Friction, reduced to the absolute minimum, dissipates energy only gradually: the rotation continues, then slows down, and the sphere eventually stops. There is no perpetual motion here, simply a very beautiful demonstration of inertia.\u003c\/p\u003e\n\n\u003cp\u003eThe illusion of floating arises from the shape of the support: the S-ribbon guides the eye and conceals the contact point, so the eye perceives a ball suspended above the curve. As for the \u003cstrong\u003ezinc alloy\u003c\/strong\u003e, it is widely used for small, precision-molded parts: its density provides stability to the base, it is well-suited to fine shapes, and it accepts various finishes, from deep black to gold.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eWhy you will love it\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-ben\"\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eA striking effect\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe sphere seems to float above the ribbon: an illusion that intrigues both young and old.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eNo batteries or electronics\u003c\/span\u003e\u003cspan class=\"ds\"\u003eEverything relies on the momentum given by your fingertips and rotational mechanics.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eDense zinc alloy\u003c\/span\u003e\u003cspan class=\"ds\"\u003eAn object with a weighty feel, stable on the desk, with meticulous finishes.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eAnti-stress break\u003c\/span\u003e\u003cspan class=\"ds\"\u003eSpinning the sphere and watching it rotate offers a few seconds of peaceful concentration.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eNine combinations\u003c\/span\u003e\u003cspan class=\"ds\"\u003eTwo sizes and body\/ball combinations to match any decor.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eDesktop format\u003c\/span\u003e\u003cspan class=\"ds\"\u003eLess than 8 cm tall: it slips easily next to a screen, a keyboard, or on a shelf.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-des\"\u003e\n\n\u003cp class=\"t\"\u003eThe elegance of balance\u003c\/p\u003e\n\n\u003cdiv class=\"x\"\u003e\n\n\u003cp\u003eBalance has always been fascinating. Jugglers, tightrope walkers, childhood tops, and laboratory gyroscopes all tell the same story: that of an object defying a fall as long as it remains in motion. AXIOME condenses this narrative into a \u003cstrong\u003esmall metal sculpture\u003c\/strong\u003e, refined down to the essentials.\u003c\/p\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eS-ribbon\u003c\/strong\u003e draws a continuous, almost calligraphic curve that begins at the base to cradle the sphere. Nothing protrudes, nothing distracts: the form serves the illusion. When the ball spins, its reflections blur into a smooth halo, and one could believe they are seeing a \u003cstrong\u003eminiature planet\u003c\/strong\u003e suspended above its orbit.\u003c\/p\u003e\n\n\u003cp\u003eIt is an object of \u003cstrong\u003eactive contemplation\u003c\/strong\u003e. You spin it during a call, between two meetings, while pondering an idea — and for a few rotations, the mind settles. On a work desk as in a library, it brings that touch of scientific curiosity that is the signature of Labo objects.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-steps\"\u003e\n\n\u003ch4\u003eMaking AXIOME spin in four steps\u003c\/h4\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e1\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eSet up the base.\u003c\/strong\u003e Place the spinning top on a flat, stable, and horizontal surface, away from vibrations and drafts.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e2\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003ePlace the sphere.\u003c\/strong\u003e Gently deposit the ball into its spot at the top of the ribbon, without forcing it.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e3\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eGive it momentum.\u003c\/strong\u003e Pinch the sphere between your thumb and index finger and give it a clean, sharp spin, as if starting a top.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e4\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eObserve the illusion.\u003c\/strong\u003e Let the sphere spin: it appears to float, then gradually slows down. Spin it again whenever you like.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eComparison of the two sizes\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-cmp\"\u003e\n\n\u003ctable\u003e\n\n\u003cthead\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCriteria\u003c\/th\u003e\n\n\u003cth\u003e6.5 cm size\u003c\/th\u003e\n\n\u003cth\u003e7.7 cm size\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/thead\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eHeight × width\u003c\/td\u003e\n\n\u003ctd\u003eApproximately 65 × 40 mm\u003c\/td\u003e\n\n\u003ctd\u003eApproximately 77 × 46 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eShape\u003c\/td\u003e\n\n\u003ctd\u003eSingle-piece S-ribbon\u003c\/td\u003e\n\n\u003ctd\u003eSlightly different shape, separate upper ring\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eBody colors\u003c\/td\u003e\n\n\u003ctd\u003eGray, silver, gold, black\u003c\/td\u003e\n\n\u003ctd\u003eBlack, silver, gray\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eSphere colors\u003c\/td\u003e\n\n\u003ctd\u003eSilver, gold, or rose gold depending on version\u003c\/td\u003e\n\n\u003ctd\u003eSilver, gold, or copper depending on version\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eNumber of versions\u003c\/td\u003e\n\n\u003ctd\u003eSix\u003c\/td\u003e\n\n\u003ctd\u003eThree\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eIdeal use\u003c\/td\u003e\n\n\u003ctd\u003eCompact desk, shelf, discreet gift\u003c\/td\u003e\n\n\u003ctd\u003eSlightly more present piece, executive desk\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-info\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eGood to know:\u003c\/strong\u003e the spin time depends on the momentum given, the flatness of the surface, and the cleanliness of the contact point. The sphere always eventually slows and stops: it is inertia, not perpetual motion, that creates this beautiful suspension effect. Discover other mechanical demonstrations in our \u003ca href=\"\/collections\/physique-et-mouvement\"\u003ephysics and movement\u003c\/a\u003e collection.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-tip\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eTip:\u003c\/strong\u003e for a longer rotation, wipe the sphere and its contact point from time to time with a soft, dry cloth to remove dust and fingerprints. Avoid abrasive products that could tarnish the finish.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eTechnical specifications\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-sp\"\u003e\n\n\u003ctable\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\n\u003ctd\u003eVisual levitation desktop spinning top\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\n\u003ctd\u003eZinc alloy\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eComposition\u003c\/td\u003e\n\n\u003ctd\u003eCylindrical base, S-ribbon, metallic sphere\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e6.5 cm size\u003c\/td\u003e\n\n\u003ctd\u003eApproximately 65 mm high × 40 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003e7.7 cm size\u003c\/td\u003e\n\n\u003ctd\u003eApproximately 77 mm high × 46 mm, separate upper ring\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eBody colors\u003c\/td\u003e\n\n\u003ctd\u003eGray, silver, gold, black\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eSphere colors\u003c\/td\u003e\n\n\u003ctd\u003eSilver, gold, rose gold, copper\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eNumber of versions\u003c\/td\u003e\n\n\u003ctd\u003eNine\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eOperation\u003c\/td\u003e\n\n\u003ctd\u003eManual, by setting the sphere into rotation\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003ePower source\u003c\/td\u003e\n\n\u003ctd\u003eNone (non-electric)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eRecommended age\u003c\/td\u003e\n\n\u003ctd\u003e14 years and older\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eWeight\u003c\/td\u003e\n\n\u003ctd\u003eNot disclosed\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-warn\"\u003e\n\n\u003cp\u003e\u003cstrong\u003ePrecautions:\u003c\/strong\u003e object recommended for ages 14 and up. The sphere is a small part that can be swallowed: keep the top out of reach of young children and animals. Do not spin the sphere off its support and always place the object on a stable surface to avoid falls that could mark the finish.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-gift\"\u003e\n\n\u003ch3\u003eA gift idea for curious minds\u003c\/h3\u003e\n\n\u003cp\u003eAXIOME makes a refined \u003cstrong\u003edesktop gift\u003c\/strong\u003e for a birthday, promotion, retirement, Father's Day, or a Secret Santa among colleagues. It appeals to engineers, design enthusiasts, and anyone who enjoys having an object on hand that is both beautiful and intriguing.\u003c\/p\u003e\n\n\u003cp\u003eTo complete the gift, explore our \u003ca href=\"\/collections\/casse-tetes-et-bureau\"\u003epuzzles and desktop objects\u003c\/a\u003e, or our \u003ca href=\"\/collections\/bureau-et-hi-tech\"\u003eoffice and high-tech\u003c\/a\u003e selection to create a workspace gift set.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-faq\"\u003e\n\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eHow does the sphere appear to float?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eThe effect relies on two components. First, \u003cstrong\u003erotational mechanics\u003c\/strong\u003e: a sphere spinning rapidly on a tiny contact point maintains its orientation thanks to its \u003cstrong\u003eangular momentum\u003c\/strong\u003e, exactly like a spinning top or a gyroscope. It therefore remains balanced as long as the speed is sufficient. Second, the \u003cstrong\u003eshape of the support\u003c\/strong\u003e: the S-ribbon is designed to visually mask the contact point, so the eye perceives a ball suspended above the curve. There are no advertised magnets, no electronics, and no hidden tricks: only physics and a design created for illusion. This is what makes the object so fascinating to observe and explain.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eHow long does the sphere spin?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eThe manufacturer does not specify an exact duration, and we prefer not to invent one. The spin time depends mostly on the \u003cstrong\u003emomentum given\u003c\/strong\u003e at the start, the \u003cstrong\u003eflatness of the surface\u003c\/strong\u003e on which the base rests, and the \u003cstrong\u003ecleanliness of the contact point\u003c\/strong\u003e. With a clean spin on a level desk, the sphere rotates long enough to fully enjoy the illusion before slowing down. It always eventually stops: it is \u003cstrong\u003enot a perpetual motion machine\u003c\/strong\u003e, which is physically impossible, but a beautiful demonstration of inertia. With a little practice, you will quickly learn the motion that produces the longest rotations.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhat is the difference between the 6.5 cm and 7.7 cm sizes?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eThe \u003cstrong\u003e6.5 cm size\u003c\/strong\u003e measures approximately 65 mm high by 40 mm wide; its S-ribbon is a single piece. It comes in six versions, with a gray, silver, gold, or black body and a silver, gold, or rose gold sphere. The \u003cstrong\u003e7.7 cm size\u003c\/strong\u003e measures approximately 77 mm high by 46 mm wide and features a \u003cstrong\u003eslightly different shape\u003c\/strong\u003e, with a separate upper ring. It is available in three versions: black with a silver ball, silver with a gold ball, and gray with a copper ball. The choice is primarily a matter of desk presence and preference for one silhouette over the other.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eDoes the top work with a magnet or a battery?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eThe manufacturer presents this object as \u003cstrong\u003enon-electric\u003c\/strong\u003e: it contains \u003cstrong\u003eno batteries, no power supply, and no motor\u003c\/strong\u003e. The supplier also makes no mention of magnets. All animation comes from the \u003cstrong\u003emomentum\u003c\/strong\u003e you give the sphere with your fingertips, and then the inertia that extends its rotation. This distinguishes AXIOME from magnetic levitation objects, which hold an element in suspension using a continuously powered electromagnetic field. Here, there are no cables and no electrical maintenance: the object is always ready, you just need to spin it. This simplicity makes it a very practical desk companion.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eIs this object suitable for children?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eThe manufacturer recommends AXIOME for ages \u003cstrong\u003e14 and up\u003c\/strong\u003e. The sphere is a \u003cstrong\u003esmall part\u003c\/strong\u003e that could be swallowed by a young child: the object must therefore be kept out of their reach. For a curious teenager, however, it is an excellent gateway to the \u003cstrong\u003ephysics of rotation\u003c\/strong\u003e: one can experiment with different spins, compare durations, observe precession as the sphere slows, and discuss angular momentum. Designed primarily as a \u003cstrong\u003edesktop object for adults\u003c\/strong\u003e, it also fits on the desk of a science-loving high school student, provided it is used reasonably and with care.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eHow do I maintain the finish?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eThe \u003cstrong\u003ezinc alloy\u003c\/strong\u003e is very simple to clean. From time to time, wipe a \u003cstrong\u003esoft, dry, lint-free cloth\u003c\/strong\u003e over the base, ribbon, and sphere to remove dust and fingerprints. Avoid \u003cstrong\u003eabrasive products\u003c\/strong\u003e, scouring sponges, and solvents, which could tarnish or scratch the finish, particularly on the gold and rose gold versions. A clean contact point also promotes longer rotations: remember to wipe it gently. Finally, keep the object away from prolonged moisture and avoid dropping it, as a fall could mark the surface or deform the ribbon.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhich version should I choose as a gift?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eIt all depends on the recipient's decor and personality. The \u003cstrong\u003eblack\u003c\/strong\u003e versions suit contemporary desks and dark equipment; the \u003cstrong\u003esilver\u003c\/strong\u003e finishes provide a bright, technical touch. The \u003cstrong\u003egold\u003c\/strong\u003e and \u003cstrong\u003erose gold\u003c\/strong\u003e spheres play the role of a precious object, ideal for a bolder gift. The \u003cstrong\u003ecopper\u003c\/strong\u003e sphere of the large gray size offers a warm contrast. If you are hesitant, the \u003cstrong\u003e6.5 cm\u003c\/strong\u003e size fits anywhere, while the \u003cstrong\u003e7.7 cm\u003c\/strong\u003e model makes a stronger statement. In any case, the surprise of the visual levitation remains the same upon first use.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\n\n\u003cp\u003e \u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Comment la sphère semble-t-elle flotter ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Une sphère qui tourne vite sur un point de contact minuscule conserve son orientation grâce à son moment cinétique, comme une toupie ou un gyroscope, et reste en équilibre tant que la vitesse est suffisante. Le ruban en S masque visuellement le point d'appui, si bien que l'œil perçoit une bille suspendue. Aucune électronique : uniquement de la physique et un design pensé pour l'illusion.\"}}, {\"@type\": \"Question\", \"name\": \"Combien de temps la sphère tourne-t-elle ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Le fabricant n'indique pas de durée précise. Elle dépend de l'élan donné, de la planéité de la surface et de la propreté du point de contact. Avec un lancer franc sur un bureau horizontal, la rotation dure assez pour profiter de l'illusion avant de ralentir. La sphère finit toujours par s'arrêter : c'est une démonstration d'inertie, pas un mouvement perpétuel.\"}}, {\"@type\": \"Question\", \"name\": \"Quelle est la différence entre les gabarits 6,5 cm et 7,7 cm ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Le gabarit 6,5 cm mesure environ 65 × 40 mm, avec un ruban en S d'un seul tenant, et existe en six versions. Le gabarit 7,7 cm mesure environ 77 × 46 mm, présente une forme légèrement différente avec un anneau supérieur séparé, et existe en trois versions : noir bille argent, argent bille dorée et gris bille cuivrée.\"}}, {\"@type\": \"Question\", \"name\": \"La toupie fonctionne-t-elle avec un aimant ou une pile ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"L'objet est présenté comme non électrique : ni pile, ni batterie, ni moteur, et le fournisseur ne mentionne pas d'aimant. Toute l'animation vient de l'élan donné à la sphère du bout des doigts, puis de l'inertie qui prolonge la rotation. Contrairement aux objets à lévitation magnétique, aucun câble ni alimentation n'est nécessaire : il suffit de lancer la sphère.\"}}, {\"@type\": \"Question\", \"name\": \"Est-ce un objet adapté aux enfants ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Le fabricant recommande AXIOME à partir de 14 ans. La sphère est une petite pièce qui pourrait être avalée : tenez l'objet hors de portée des jeunes enfants. Pour un adolescent curieux, c'est en revanche une belle introduction à la physique de la rotation, idéale pour comparer des lancers et observer la précession lorsque la sphère ralentit.\"}}, {\"@type\": \"Question\", \"name\": \"Comment entretenir la finition ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Passez de temps en temps un chiffon doux, sec et non pelucheux sur le socle, le ruban et la sphère pour retirer poussière et traces de doigts. Évitez produits abrasifs, éponges grattantes et solvants, surtout sur les finitions dorées et or rose. Un point de contact propre favorise des rotations plus longues. Évitez aussi l'humidité prolongée et les chutes.\"}}, {\"@type\": \"Question\", \"name\": \"Quelle version choisir pour offrir ?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Les versions noires s'accordent aux bureaux contemporains, l'argent apporte une touche lumineuse et technique, le doré et la sphère or rose jouent la carte de l'objet précieux, et la sphère cuivrée offre un contraste chaleureux. Le gabarit 6,5 cm se glisse partout, le 7,7 cm affirme davantage sa présence. L'effet de lévitation visuelle reste le même pour toutes.\"}}]}\u003c\/script\u003e\n","brand":"Atelier Atypique","offers":[{"title":"Black – silver ballpoint \/ Small","offer_id":54860756255043,"sku":"1005008504171030-black-slive","price":34.9,"currency_code":"EUR","in_stock":true},{"title":"Black – silver ballpoint \/ Large","offer_id":54860756025667,"sku":"1005008504171030-black","price":44.9,"currency_code":"EUR","in_stock":true},{"title":"Silver – silver marble \/ Small","offer_id":54860756222275,"sku":"1005008504171030-slive-slive","price":34.9,"currency_code":"EUR","in_stock":true},{"title":"Grey – rose gold bead \/ Small","offer_id":54860755992899,"sku":"1005008504171030-gray-rose-gold","price":34.9,"currency_code":"EUR","in_stock":true},{"title":"Money – gold ball \/ Small","offer_id":54860756091203,"sku":"1005008504171030-slive-gold","price":34.9,"currency_code":"EUR","in_stock":true},{"title":"Money – gold ball \/ 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.aa-gift{background:linear-gradient(135deg,#FFFDF7,#FFF9E8);border:1px solid #FAC775;border-radius:10px;padding:1.3rem 1.5rem;margin:1.5rem 0}\n.aa .aa-gift h3{color:#5C3A1E;font-size:16px;margin:0 0 .6rem}\n.aa .aa-gift p{font-size:14px}\n.aa .aa-faq{margin:1rem 0 1.5rem}\n.aa details.aa-q{border-bottom:1px solid #ebe5d6;padding:.85rem 0}\n.aa details.aa-q summary{font-size:14px;font-weight:700;list-style:none;padding-right:20px;position:relative;cursor:pointer}\n.aa details.aa-q summary::-webkit-details-marker{display:none}\n.aa details.aa-q summary::after{content:\"+\";position:absolute;right:0;top:0;color:#FAC775;font-size:18px;line-height:1}\n.aa details.aa-q[open] summary::after{content:\"\\2212\"}\n.aa .aa-a{font-size:13px;color:#3a3a3a;margin-top:.5rem}\n.aa .aa-a p{margin:0 0 .5rem}\n@media(max-width:600px){.aa .aa-vars,.aa .aa-ben{grid-template-columns:1fr}}\n\u003c\/style\u003e\n\u003cdiv class=\"aa\"\u003e\n\n\u003cp\u003e\u003cspan class=\"aa-badge aa-badge-noir\"\u003eThe Lab\u003c\/span\u003e \u003cspan class=\"aa-badge aa-badge-bleu\"\u003eEducational Equipment\u003c\/span\u003e How high must the marble be raised to complete the loop? This \u003cstrong\u003edemonstration loop track\u003c\/strong\u003e turns the question into an experimental protocol. Its \u003cstrong\u003eV-profile aluminum rails\u003c\/strong\u003e launch from a long \u003cstrong\u003estarting ramp\u003c\/strong\u003e, trace one or two vertical loops, and then end in a \u003cstrong\u003ecatching net\u003c\/strong\u003e that collects the marble at the finish. The whole assembly is mounted on a \u003cstrong\u003ewooden base\u003c\/strong\u003e approximately 40 cm long. Two versions are available: the \u003cstrong\u003esingle loop\u003c\/strong\u003e for a direct demonstration, or the \u003cstrong\u003edouble loop\u003c\/strong\u003e, which combines a large circle of approximately 7 cm in radius with a small one of approximately 3.5 cm to compare passage thresholds. According to the manual, the demonstrator comes with a \u003cstrong\u003esteel marble\u003c\/strong\u003e and a \u003cstrong\u003eplastic marble\u003c\/strong\u003e 2.5 cm in diameter: perfect for testing the influence of mass and observing that it changes almost nothing. Conservation of energy, minimum speed at the summit, friction: every launch becomes a measurement, every failure a hypothesis to be reformulated.\u003c\/p\u003e\n\n\u003ch3 class=\"aa-title\"\u003eAvailable versions\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-vars\"\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v light\" style=\"background: #9A9A9A;\"\u003eSINGLE LOOP\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eSingle loop\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003eOne vertical loop: the most direct demonstration\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v dark\" style=\"background: #1A1A1A;\"\u003eDOUBLE LOOP\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eDouble loop\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003eLarge circle (≈ 7 cm radius) and small circle (≈ 3.5 cm) for comparison\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-mat\"\u003e\n\n\u003ch3\u003eEnergy, height, and critical velocity\u003c\/h3\u003e\n\n\u003cp\u003eReleased at the top of the ramp, the marble possesses \u003cstrong\u003egravitational potential energy\u003c\/strong\u003e proportional to its height. As it descends, this reserve is converted into \u003cstrong\u003ekinetic energy\u003c\/strong\u003e. Part of this energy is then reinvested to regain altitude in the loop. The balance, established by 19th-century physicists under the name of \u003cstrong\u003econservation of mechanical energy\u003c\/strong\u003e, allows for the prediction of the marble's speed at every point of the journey, friction notwithstanding.\u003c\/p\u003e\n\n\u003cp\u003eAt the top of the circle, the only question is whether the marble is moving fast enough for the curved trajectory to be sustainable: v² ≥ g·R is required. Coupled with the energy balance, this condition provides a minimum starting height of \u003cstrong\u003e2.5 times the radius\u003c\/strong\u003e for an object that slides, and approximately \u003cstrong\u003e2.7 times the radius\u003c\/strong\u003e for a solid marble that rolls, because it also stores energy in its rotation. With two loops of different radii, you can verify that the small circle can be cleared from a much lower starting point than the large one.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eWhat this demonstrator brings\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-ben\"\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eA quantitative experience\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe starting height can be varied step-by-step: you look for the passage threshold rather than just watching.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eTwo radii to compare\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe double loop places a large and a small circle side by side: the effect of the radius is immediately obvious.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eTwo marbles, one lesson\u003c\/span\u003e\u003cspan class=\"ds\"\u003eSteel or plastic, same diameter: the comparison proves that mass does not play a role in the passage condition.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eV-rail for guidance\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe V-profile of the aluminum keeps the marble on its trajectory for reproducible trials.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eControlled finish\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe catching net stops the marble at the end of the run: no chasing under the tables.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eNo external energy\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe only source of movement is gravity: the object works everywhere, without batteries or plugs.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-des\"\u003e\n\n\u003cp class=\"t\"\u003eThe laboratory classroom, an elegant version\u003c\/p\u003e\n\n\u003cdiv class=\"x\"\u003e\n\n\u003cp\u003eIn the high schools of yesteryear, physics cabinets lined up wood-and-brass demonstration apparatuses designed so that an entire class could see the phenomenon from the back of the room. This loop track follows in that tradition: a sturdy \u003cstrong\u003ewooden base\u003c\/strong\u003e, neat \u003cstrong\u003ealuminum\u003c\/strong\u003e rails, and a path that can be read from a distance.\u003c\/p\u003e\n\n\u003cp\u003eBut its real wealth lies elsewhere: it invites you to \u003cstrong\u003emeasure\u003c\/strong\u003e. Identify the starting height, note the result, try again a little lower, compare the large and small loops, swap the steel marble for the plastic one. In half an hour, students retrace the intellectual path of the scientists who founded mechanics: observe, conjecture, verify. And at home, the object keeps that little thrill intact when the marble hesitates at the summit.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-steps\"\u003e\n\n\u003ch4\u003eFour-step protocol\u003c\/h4\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e1\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eInstall the stand.\u003c\/strong\u003e Place the base on a horizontal table, clear of the catching net. If necessary, check for levelness with a spirit level.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e2\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eMark the heights.\u003c\/strong\u003e Mark several starting points on the ramp (a small piece of repositionable tape is enough) and measure their height above the bottom of the loop.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e3\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eRelease without push.\u003c\/strong\u003e Place the marble on a mark and release it without pushing. Note whether it clears the loop, or both loops on the double version.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e4\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eCompare and conclude.\u003c\/strong\u003e Repeat with the other marble, then compare the measured threshold height to the theoretical value of 2.7 times the radius. The difference illustrates the role of friction.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eComparison of the two versions\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-cmp\"\u003e\n\n\u003ctable\u003e\n\n\u003cthead\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCriterion\u003c\/th\u003e\n\n\u003cth\u003eSingle loop\u003c\/th\u003e\n\n\u003cth\u003eDouble loop\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/thead\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eNumber of loops\u003c\/td\u003e\n\n\u003ctd\u003eOne\u003c\/td\u003e\n\n\u003ctd\u003eTwo, of different radii\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eRadius\/radii indicated\u003c\/td\u003e\n\n\u003ctd\u003eNot specified for this version\u003c\/td\u003e\n\n\u003ctd\u003e≈ 7 cm and ≈ 3.5 cm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eRail\u003c\/td\u003e\n\n\u003ctd\u003eV-profile aluminum\u003c\/td\u003e\n\n\u003ctd\u003eV-profile aluminum\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eBase\u003c\/td\u003e\n\n\u003ctd\u003eWood, ≈ 40 cm\u003c\/td\u003e\n\n\u003ctd\u003eWood, ≈ 40 cm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMarbles (manual)\u003c\/td\u003e\n\n\u003ctd\u003eSteel and plastic, Ø 2.5 cm\u003c\/td\u003e\n\n\u003ctd\u003eSteel and plastic, Ø 2.5 cm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eKey experiment\u003c\/td\u003e\n\n\u003ctd\u003eFind minimum passage height\u003c\/td\u003e\n\n\u003ctd\u003eCompare radius effect on threshold\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eRecommended audience\u003c\/td\u003e\n\n\u003ctd\u003eDiscovery, middle school, office\u003c\/td\u003e\n\n\u003ctd\u003eHigh school, higher ed, enthusiasts\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/div\u003e\n\n\u003cp\u003eWant to explore other mechanical phenomena? Our \u003ca href=\"\/collections\/physique-et-mouvement\"\u003ephysics and motion\u003c\/a\u003e collection brings together pendulums, motors, and demonstrators that ideally complement this track.\u003c\/p\u003e\n\n\u003cdiv class=\"aa-info\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eGood to know:\u003c\/strong\u003e the loop radii and marble diameters are those indicated in the \u003cstrong\u003emanufacturer's manual\u003c\/strong\u003e; the base length is estimated from a photo. The manufacturer does not specify the total height, weight, or whether the device is delivered pre-assembled.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-tip\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eTip:\u003c\/strong\u003e film the passes in slow motion with a smartphone placed facing the loop. Frame by frame, you can clearly see the marble slow down at the summit, and sometimes lift slightly off the rail just before stalling: an excellent aid for an experimental report.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eTechnical specifications\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-sp\"\u003e\n\n\u003ctable\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eType\u003c\/td\u003e\n\n\u003ctd\u003eDemonstration loop track (centripetal force)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eVersions\u003c\/td\u003e\n\n\u003ctd\u003eSingle loop or double loop\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eRails\u003c\/td\u003e\n\n\u003ctd\u003eAluminum, V-profile\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eLoop radius (double version)\u003c\/td\u003e\n\n\u003ctd\u003e≈ 7 cm and ≈ 3.5 cm (manual)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMarbles (manual)\u003c\/td\u003e\n\n\u003ctd\u003e1 steel marble and 1 plastic marble, Ø 2.5 cm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eBase\u003c\/td\u003e\n\n\u003ctd\u003eWood\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eBase length\u003c\/td\u003e\n\n\u003ctd\u003e≈ 40 cm (photo estimate)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eFinish\u003c\/td\u003e\n\n\u003ctd\u003eMarble catching net\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eOperation\u003c\/td\u003e\n\n\u003ctd\u003eGravity, no power supply\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eConcepts covered\u003c\/td\u003e\n\n\u003ctd\u003eEnergy conservation, centripetal force, minimum speed at summit\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eHeight \/ weight\u003c\/td\u003e\n\n\u003ctd\u003eNot provided\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-warn\"\u003e\n\n\u003cp\u003e\u003cstrong\u003ePrecautions:\u003c\/strong\u003e the marbles are \u003cstrong\u003esmall parts\u003c\/strong\u003e: not recommended for children under 3; with children, an adult must always supervise the experiment. The steel marble can damage floors or fragile objects if dropped: work over a table. Do not bend the rails, as their shape is critical to successful runs.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-gift\"\u003e\n\n\u003ch3\u003eA gift for minds that want to understand\u003c\/h3\u003e\n\n\u003cp\u003eThis demonstrator will delight a \u003cstrong\u003ephysics teacher\u003c\/strong\u003e who wants to refresh their lessons, a high school or prep school student, a science club, or a parent who enjoys conducting experiments with their teenagers. It is also an original gift for a mechanical engineer or a roller coaster enthusiast.\u003c\/p\u003e\n\n\u003cp\u003eTo complete the set, discover the entire selection of \u003ca href=\"\/collections\/objets-scientifiques\"\u003escientific objects from The Lab\u003c\/a\u003e or a puzzle from our \u003ca href=\"\/collections\/casse-tetes-et-bureau\"\u003epuzzles and office\u003c\/a\u003e collection.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eFrequently asked questions\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-faq\"\u003e\n\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eShould I choose the single or the double loop?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eIt all depends on what you want to show. The \u003cstrong\u003esingle loop\u003c\/strong\u003e is enough to introduce centripetal force and search for the minimum starting height: it is the most readable version for a first discovery or for an office. The \u003cstrong\u003edouble loop\u003c\/strong\u003e adds a valuable comparative dimension: with a large circle of approximately 7 cm in radius and a small one of 3.5 cm, it shows concretely that the passage threshold depends on the radius. For use in class, in a science club, or for an enthusiast who likes to experiment, the double version offers significantly more experimental scenarios.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhat are the two marbles provided for?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eAccording to the manual, the demonstrator comes with a \u003cstrong\u003esteel marble\u003c\/strong\u003e and a \u003cstrong\u003eplastic marble\u003c\/strong\u003e of the same diameter, 2.5 cm. Comparing them illustrates a result that is often surprising: the condition for passing the summit does \u003cstrong\u003enot depend on the mass\u003c\/strong\u003e. Indeed, mass appears on both sides of the energy and force equations, and cancels out. In practice, slight differences may appear because the lighter marble is more sensitive to friction and small imperfections in the rail. Discussing these differences is one of the educational benefits of the experiment, which teaches how to distinguish between a theoretical model and a real-world measurement.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eFrom what height should the marble be released?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eThe theory provides a clear guideline. For an object sliding without friction, the start must be at least \u003cstrong\u003e2.5 radii\u003c\/strong\u003e of the loop, measured from the lowest point of the circle. For a solid marble that rolls, the energy spent on its own rotation raises the threshold to approximately \u003cstrong\u003e2.7 times the radius\u003c\/strong\u003e. With a 7 cm radius loop, this represents slightly less than 19 cm of starting height. Real friction increases this value further: this is the whole point of measuring it and comparing it to the calculation.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhat academic level is the demonstrator suitable for?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eIt adapts to many levels. In \u003cstrong\u003emiddle school\u003c\/strong\u003e, one simply observes the link between height and speed and formulates hypotheses. In \u003cstrong\u003ehigh school\u003c\/strong\u003e, it illustrates the conservation of mechanical energy and forces in circular motion. In \u003cstrong\u003eprep school or university\u003c\/strong\u003e, it allows one to explore the rotational energy of the marble and the analysis of friction. It also works very well in scientific outreach or at home with curious teenagers. With young children, the presence of an adult is essential, as the marbles are small parts to be kept out of reach of children under 3.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhat is the net at the end of the rail for?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eThe \u003cstrong\u003ecatching net\u003c\/strong\u003e stops the marble at the end of its run. Without it, a marble launched at full speed would leave the base and roll on the table, or even fall to the floor. It makes series of tests much more fluid: you retrieve the marble in the same place each time, note the result, and start again immediately. It is also a welcome safety feature with the heavier \u003cstrong\u003esteel marble\u003c\/strong\u003e, which could damage wood flooring or hit a fragile object if it falls. Simply keep the space in front of the net clear so the marble can enter freely.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhy V-shaped rails?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eV-profile\u003c\/strong\u003e creates two points of contact between the marble and the rail. The marble is thus naturally centered and guided throughout the length of the path, including in the inverted part of the loop, where a flat rail would let it drift laterally. This guidance improves the \u003cstrong\u003ereproducibility of trials\u003c\/strong\u003e: at the same starting height, the marble follows the same trajectory from one launch to the next, which is essential for measuring a passage threshold. \u003cstrong\u003eAluminum\u003c\/strong\u003e, being light and rigid, retains its shape well. Regular dusting with a dry cloth is enough to preserve the quality of the roll.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eIs the demonstrator delivered assembled?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eThe manufacturer \u003cstrong\u003edoes not specify\u003c\/strong\u003e whether the device is shipped fully assembled or if certain elements, such as the net or the rails, must be attached to the base upon receipt. We prefer not to claim anything we cannot guarantee. The photos show a simple assembly consisting of the \u003cstrong\u003ewooden base\u003c\/strong\u003e, the aluminum rails, and the catching net, without any mechanism or electronics. If this information is decisive for you, for example to prepare a lab session for a specific date, contact us before your order and we will respond with the elements we have available.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Atelier Atypique","offers":[{"title":"Simple loop","offer_id":54860800688451,"sku":"1005012000667123-single-lap-CN","price":169.9,"currency_code":"EUR","in_stock":true},{"title":"Double loop","offer_id":54860800655683,"sku":"1005012000667123-double-circles-CN","price":169.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0231\/3365\/0991\/files\/S60be848bb0ff4f158758504549a17fa95.webp?v=1791061033"},{"product_id":"demonstrateur-decomposition-et-composition-des-forces-anneau-equilibra","title":"Force composition and decomposition demonstrator, ring — 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td:first-child{font-weight:700;color:#1A1A1A;width:45%}\n.aa .aa-gift{background:linear-gradient(135deg,#FFFDF7,#FFF9E8);border:1px solid #FAC775;border-radius:10px;padding:1.3rem 1.5rem;margin:1.5rem 0}\n.aa .aa-gift h3{color:#5C3A1E;font-size:16px;margin:0 0 .6rem}\n.aa .aa-gift p{font-size:14px}\n.aa .aa-faq{margin:1rem 0 1.5rem}\n.aa details.aa-q{border-bottom:1px solid #ebe5d6;padding:.85rem 0}\n.aa details.aa-q summary{font-size:14px;font-weight:700;list-style:none;padding-right:20px;position:relative;cursor:pointer}\n.aa details.aa-q summary::-webkit-details-marker{display:none}\n.aa details.aa-q summary::after{content:\"+\";position:absolute;right:0;top:0;color:#FAC775;font-size:18px;line-height:1}\n.aa details.aa-q[open] summary::after{content:\"\\2212\"}\n.aa .aa-a{font-size:13px;color:#3a3a3a;margin-top:.5rem}\n.aa .aa-a p{margin:0 0 .5rem}\n@media(max-width:600px){.aa .aa-vars,.aa .aa-ben{grid-template-columns:1fr}}\n\u003c\/style\u003e\n\u003cdiv class=\"aa\"\u003e\n\n\u003cp\u003e\u003cspan class=\"aa-badge aa-badge-noir\"\u003eThe Lab\u003c\/span\u003e \u003cspan class=\"aa-badge aa-badge-bleu\"\u003eEducational Equipment\u003c\/span\u003e Three spheres suspended in the heart of a ring, a few taut strings, and suddenly the vectors from the physics textbook come to life. This \u003cstrong\u003eforce decomposition and composition demonstrator\u003c\/strong\u003e makes one of the fundamental principles of mechanics visible: an object remains stationary when the forces acting upon it cancel each other out. A large \u003cstrong\u003emetal ring\u003c\/strong\u003e with the appearance of an aluminum rim is mounted vertically on a \u003cstrong\u003ewhite tubular stand\u003c\/strong\u003e. Inside, \u003cstrong\u003ethree green spheres\u003c\/strong\u003e are held by \u003cstrong\u003etaut links\u003c\/strong\u003e that materialize the directions of the forces. A unique feature of this model: the \u003cstrong\u003etilting ring\u003c\/strong\u003e allows you to change the orientation of the entire assembly and observe how \u003cstrong\u003eequilibrium\u003c\/strong\u003e is restored. With its \u003cstrong\u003e50.5 cm height\u003c\/strong\u003e, 48 cm width, and 15 cm depth, it can be seen from the back of a classroom. An \u003cstrong\u003eeducational physics tool\u003c\/strong\u003e with a graphic design, it also makes a striking display object for an engineer's office.\u003c\/p\u003e\n\n\u003ch3 class=\"aa-title\"\u003eThe model\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-vars\"\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v light\" style=\"background: #9A9A9A;\"\u003eUNIQUE MODEL\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eUnique model\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003eTilting metal ring, 3 green spheres, white tubular stand\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v dark\" style=\"background: linear-gradient(135deg,#F5F0E8 0%,#2E6B3F 100%);\"\u003e505 × 480 × 150 MM\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eDimensions\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003eHeight 50.5 cm · width 48 cm · depth 15 cm\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-mat\"\u003e\n\n\u003ch3\u003eComposing and decomposing a force\u003c\/h3\u003e\n\n\u003cp\u003eA force is represented by an arrow, a \u003cstrong\u003evector\u003c\/strong\u003e, which has a direction, a sense, and a magnitude. When several forces act on the same point, they can be replaced by a single force, their \u003cstrong\u003eresultant\u003c\/strong\u003e: this is the composition of forces. Conversely, a force can be decomposed into several components along chosen directions. The Flemish mathematician Simon Stevin illustrated this as early as 1586 with his famous \"garland\" placed on an inclined plane, and the \u003cstrong\u003eparallelogram rule\u003c\/strong\u003e provides the geometric construction for it.\u003c\/p\u003e\n\n\u003cp\u003eWhen an object is motionless, the vector sum of the forces acting upon it is zero: this is the \u003cstrong\u003econdition of equilibrium\u003c\/strong\u003e, a direct consequence of Newton's laws. In this demonstrator, each sphere is held by taut links whose directions are visible; their tensions, combined with the weight of the sphere, cancel each other out exactly. By tilting the ring, the angles are modified, and you can see the equilibrium reorganize, which makes the way the intensity of each component depends on its direction tangible.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eWhy this demonstrator is compelling\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-ben\"\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eVectors become visible\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe taut links literally draw the directions of the forces: the diagram on the board gains depth.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eLarge, legible format\u003c\/span\u003e\u003cspan class=\"ds\"\u003eWith a ring approximately 48 cm wide, the demonstration remains visible to an entire class.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eTilting ring\u003c\/span\u003e\u003cspan class=\"ds\"\u003eChanging the orientation of the ring allows for comparing multiple equilibrium configurations with the same device.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eGraphic contrast\u003c\/span\u003e\u003cspan class=\"ds\"\u003eGreen spheres, metal ring, and white stand: immediate legibility, even from a distance.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eNo power supply\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe demonstrator relies solely on gravity and the tension of the links: nothing to plug in.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eAn object with character\u003c\/span\u003e\u003cspan class=\"ds\"\u003eOutside the classroom, its technical sculpture silhouette is intriguing on a desk or shelf.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-des\"\u003e\n\n\u003cp class=\"t\"\u003eWhen equilibrium becomes a work of art\u003c\/p\u003e\n\n\u003cdiv class=\"x\"\u003e\n\n\u003cp\u003eLong before calculation software, engineers dimensioned bridges, cranes, and frames by drawing force polygons with a ruler and compass. This \u003cstrong\u003egraphic statics\u003c\/strong\u003e enabled the construction of the great metal structures of the 19th century. This demonstrator offers a three-dimensional version of that: each taut link is a construction line, each sphere a structural node.\u003c\/p\u003e\n\n\u003cp\u003eIts \u003cstrong\u003emetal ring\u003c\/strong\u003e evokes a bicycle wheel, its white stand the sobriety of a laboratory instrument, its \u003cstrong\u003egreen spheres\u003c\/strong\u003e the precision of a colored diagram. In front of it, students understand at a glance why a highly inclined cable must be much tighter than a vertical cable to carry the same load. And when the ring tilts, the equilibrium is recomposed before their eyes, silent proof that the laws of mechanics do not depend on one's point of view.\u003c\/p\u003e\n\n\u003cp\u003eWe then measure the universality of \u003cstrong\u003estatics\u003c\/strong\u003e: the same rules govern the tension of a clothesline, the inclination of a suspension bridge's stays, and the work of the muscles that maintain our posture. One single object, and a whole section of the built world becomes legible.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-steps\"\u003e\n\n\u003ch4\u003eUsing the demonstrator in four steps\u003c\/h4\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e1\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eSet up the device.\u003c\/strong\u003e Place the stand on a stable, horizontal table with sufficient clearance around the ring (48 cm wide, 50.5 cm high).\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e2\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eObserve the initial equilibrium.\u003c\/strong\u003e Note the position of the three spheres and the direction of each link: have students identify the forces acting on each sphere.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e3\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eTilt the ring.\u003c\/strong\u003e Gently change the orientation of the ring and observe how the links and spheres adopt a new configuration.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e4\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eDiagram and conclude.\u003c\/strong\u003e Reproduce the vectors of each configuration on the board, construct the parallelograms, and verify that the resultant is zero at equilibrium.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eComparison\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-cmp\"\u003e\n\n\u003ctable\u003e\n\n\u003cthead\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCriteria\u003c\/th\u003e\n\n\u003cth\u003eThis ring demonstrator\u003c\/th\u003e\n\n\u003cth\u003eClassic force table\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/thead\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003ePrinciple\u003c\/td\u003e\n\n\u003ctd\u003eSpheres suspended by taut links in a ring\u003c\/td\u003e\n\n\u003ctd\u003eStrings, pulleys, and calibrated weights around a graduated disc\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eOrientation\u003c\/td\u003e\n\n\u003ctd\u003eVertical, tilting ring\u003c\/td\u003e\n\n\u003ctd\u003eHorizontal\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eClassroom visibility\u003c\/td\u003e\n\n\u003ctd\u003eLarge format, readable from afar\u003c\/td\u003e\n\n\u003ctd\u003eMainly for close-up practical work\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eQuantitative measurement\u003c\/td\u003e\n\n\u003ctd\u003eQualitative reading of directions\u003c\/td\u003e\n\n\u003ctd\u003eMeasurement of angles and weights\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eSpace requirement\u003c\/td\u003e\n\n\u003ctd\u003e50.5 × 48 × 15 cm\u003c\/td\u003e\n\n\u003ctd\u003eVariable\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eKey strength\u003c\/td\u003e\n\n\u003ctd\u003eCollective and visual demonstration\u003c\/td\u003e\n\n\u003ctd\u003eQuantitative exercises\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/div\u003e\n\n\u003cp\u003eTo complete your equipment, our \u003ca href=\"\/collections\/physique-et-mouvement\"\u003ephysics and motion\u003c\/a\u003e collection brings together mechanics demonstrators, pendulums, and Stirling engines.\u003c\/p\u003e\n\n\u003cdiv class=\"aa-info\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eGood to know:\u003c\/strong\u003e the dimensions provided are \u003cstrong\u003e505 mm high, 480 mm wide, and 150 mm deep\u003c\/strong\u003e. The manufacturer provides no other technical information (weight, stand material, link adjustment): the product sheet describes what is shown in the photos.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-tip\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eTip:\u003c\/strong\u003e photograph the device from the front in each configuration, then project the image and draw the vectors directly onto it. Students can then measure the angles with a protractor and construct the force parallelograms on a faithful image of the assembly.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eTechnical specifications\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-sp\"\u003e\n\n\u003ctable\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eType\u003c\/td\u003e\n\n\u003ctd\u003eForce decomposition and composition demonstrator\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMain element\u003c\/td\u003e\n\n\u003ctd\u003eMetal ring, aluminum appearance (per photos)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eSpecial feature\u003c\/td\u003e\n\n\u003ctd\u003eTilting ring\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eSuspended masses\u003c\/td\u003e\n\n\u003ctd\u003e3 green spheres\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eConnections\u003c\/td\u003e\n\n\u003ctd\u003eTaut links (strings or cables) inside the ring\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eSupport\u003c\/td\u003e\n\n\u003ctd\u003eWhite tubular stand\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eHeight\u003c\/td\u003e\n\n\u003ctd\u003e505 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eWidth\u003c\/td\u003e\n\n\u003ctd\u003e480 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDepth\u003c\/td\u003e\n\n\u003ctd\u003e150 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eOperation\u003c\/td\u003e\n\n\u003ctd\u003eGravity and tension, no power supply\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eConcepts covered\u003c\/td\u003e\n\n\u003ctd\u003eVectors, resultant, static equilibrium, parallelogram of forces\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eWeight\u003c\/td\u003e\n\n\u003ctd\u003eNot disclosed\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-warn\"\u003e\n\n\u003cp\u003e\u003cstrong\u003ePrecautions:\u003c\/strong\u003e install the demonstrator on a \u003cstrong\u003estable\u003c\/strong\u003e surface, away from the edge of the table: its height makes it sensitive to shocks. Tilt the ring smoothly and do not pull on the links, as their tension is essential for the demonstration. The spheres may constitute small parts: keep out of reach of children under 3 years old; adult supervision is required for younger users.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-gift\"\u003e\n\n\u003ch3\u003eTo equip a classroom or please an engineer\u003c\/h3\u003e\n\n\u003cp\u003eThis demonstrator is primarily intended for \u003cstrong\u003ephysics teachers\u003c\/strong\u003e, schools, and science clubs that want a striking collective demonstration. It also makes an original gift for a structural engineer, an architect, or a mechanics student, who will gladly display it in their office.\u003c\/p\u003e\n\n\u003cp\u003eTo complete the collection, browse our \u003ca href=\"\/collections\/objets-scientifiques\"\u003eLab scientific objects\u003c\/a\u003e or the puzzles in our \u003ca href=\"\/collections\/casse-tetes-et-bureau\"\u003epuzzles and office\u003c\/a\u003e selection.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eFrequently asked questions\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-faq\"\u003e\n\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhat exactly does this device demonstrate?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eIt illustrates the \u003cstrong\u003ecomposition and decomposition of forces\u003c\/strong\u003e, as well as the equilibrium condition of a stationary object. Each green sphere is subject to its own weight and the tension of the links holding it. These forces have different directions, clearly materialized by the links, and their vector sum is zero since the sphere does not move. The demonstrator thus allows for a concrete visualization of the \u003cstrong\u003eparallelogram rule\u003c\/strong\u003e and the notion of resultant. By tilting the ring, you change the directions of the forces and observe how a new equilibrium is established, which significantly enriches classroom discussion.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhat are its dimensions?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eThe demonstrator measures \u003cstrong\u003e505 mm high\u003c\/strong\u003e, \u003cstrong\u003e480 mm wide\u003c\/strong\u003e, and \u003cstrong\u003e150 mm deep\u003c\/strong\u003e. This large format is intentional: it allows an entire class to follow the demonstration from their seats without having to gather around the desk. Provide a stable table at least fifty centimeters wide, with a bit of space around the ring to allow it to tilt without hitting other objects. The manufacturer does not provide the weight of the device. However, its shallow depth makes it easy to store on a shelf between sessions.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhat is the tilting ring for?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eThe ring can change orientation, which modifies the \u003cstrong\u003eangles between the links\u003c\/strong\u003e and the direction of the weight relative to them. The result: the spheres adopt a new equilibrium position and the distribution of tensions changes. This feature allows for the comparison of multiple configurations with a single device and shows that the same weight can require very different tensions depending on the inclination of the links. It is an excellent way to introduce a often counter-intuitive concept: the closer a cable is to the horizontal, the more \u003cstrong\u003etension\u003c\/strong\u003e it must have to carry a load. The manufacturer does not specify the exact range of the tilt.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eCan forces be measured with this demonstrator?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eThis demonstrator is primarily \u003cstrong\u003equalitative\u003c\/strong\u003e: it makes the directions of forces and the state of equilibrium visible, but it is not delivered with any dynamometers or calibrated weights according to the manufacturer. However, it is very well suited for \u003cstrong\u003esemi-quantitative\u003c\/strong\u003e work: by photographing the device from the front, one can measure the angles of the links with a protractor, then construct the force parallelograms to scale based on the weight of a sphere. Students can then compare the relative tensions of the different links. For direct intensity measurements, it is usefully supplemented by a force table with dynamometers.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eFor which level of education is it suitable?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eIt covers a wide spectrum. In \u003cstrong\u003emiddle school\u003c\/strong\u003e, it helps students understand that a stationary object is subject to forces that cancel each other out. In \u003cstrong\u003ehigh school\u003c\/strong\u003e, it illustrates the vector representation of forces, vector sums, and the principle of inertia. In \u003cstrong\u003ehigher education\u003c\/strong\u003e, particularly in civil engineering or mechanics, it serves as a visual introduction to statics and structural calculation. Its large format makes it above all a tool for collective demonstration, handled by the teacher in front of the class. It also finds a place in a science museum or a science outreach space.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eDoes the demonstrator require any adjustment?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eThe manufacturer does not provide a detailed manual on link adjustment or the state of delivery, and we prefer not to claim anything we cannot guarantee. Based on the photos, the device is delivered as a set ready for demonstration, with the \u003cstrong\u003ethree spheres already suspended\u003c\/strong\u003e by their links. Before each session, simply check that the links are taut and that none are tangled, then ensure the \u003cstrong\u003estand\u003c\/strong\u003e is resting flat. If any assembly point seems uncertain upon receipt, contact us: we will transmit any additional information available.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eHow should it be maintained and stored?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eMaintenance is simple. Dust the \u003cstrong\u003emetal ring\u003c\/strong\u003e and the stand with a soft, dry cloth, without abrasive products. Avoid pulling on the links or twisting them: their tension and position are essential for the demonstration. For transport from one room to another, hold the device by the stand rather than the ring. Between uses, store it upright on a shelf or in a cupboard, away from shocks; its \u003cstrong\u003edepth of 15 cm\u003c\/strong\u003e facilitates storage. A cover or a simple cloth will effectively protect it from dust.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Atelier Atypique","offers":[{"title":"Default Title","offer_id":54860800786755,"sku":"1005011743325146-CN","price":199.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0231\/3365\/0991\/files\/S17bfe70810164a388a814a3f9a326fbdA.webp?v=1791061009"},{"product_id":"sculpture-cinetique-de-bureau-orbite-celeste-doree-astralis","title":"Golden Celestial Orbit Desktop Kinetic Sculpture — ASTRALIS","description":"\u003cstyle\u003e\n.aa{font-family:Georgia,'Times New Roman',serif;color:#1A1A1A;line-height:1.7;font-size:15px;max-width:760px;margin:0 auto}\n.aa p{margin:0 0 1rem}\n.aa a{color:#185FA5;text-decoration:underline}\n.aa .aa-title{display:inline-block;border-bottom:2px solid #FAC775;padding-bottom:4px;font-size:16px;font-weight:600;margin:1.75rem 0 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0 1.5rem}\n.aa details.aa-q{border-bottom:1px solid #ebe5d6;padding:.85rem 0}\n.aa details.aa-q summary{font-size:14px;font-weight:700;list-style:none;padding-right:20px;position:relative;cursor:pointer}\n.aa details.aa-q summary::-webkit-details-marker{display:none}\n.aa details.aa-q summary::after{content:\"+\";position:absolute;right:0;top:0;color:#FAC775;font-size:18px;line-height:1}\n.aa details.aa-q[open] summary::after{content:\"\\2212\"}\n.aa .aa-a{font-size:13px;color:#3a3a3a;margin-top:.5rem}\n.aa .aa-a p{margin:0 0 .5rem}\n@media(max-width:600px){.aa .aa-vars,.aa .aa-ben{grid-template-columns:1fr}}\n\u003c\/style\u003e\n\u003cdiv class=\"aa\"\u003e\n\n\u003cp\u003e\u003cspan class=\"aa-badge aa-badge-noir\"\u003eThe Lab\u003c\/span\u003e \u003cspan class=\"aa-badge aa-badge-or\"\u003eGold finish\u003c\/span\u003e A flick of your fingertips, and a small universe begins to turn. This \u003cstrong\u003ekinetic desk sculpture\u003c\/strong\u003e evokes the armillary spheres and orreries of astronomers past, reinterpreted in a resolutely decorative language. On a \u003cstrong\u003egold rectangular base\u003c\/strong\u003e, two \u003cstrong\u003ecurved uprights\u003c\/strong\u003e support a set of \u003cstrong\u003econcentric rings\u003c\/strong\u003e, each pivoting on its axis like interlaced orbits. \u003cstrong\u003eGold spheres\u003c\/strong\u003e punctuate their path, while at the center of the ensemble shines a \u003cstrong\u003etranslucent green central sphere\u003c\/strong\u003e, enhanced by small beads of the same green. Set in motion by hand, the rings rotate, intersect, and shift in a ballet that slowly decelerates before coming to a stop in a new configuration. Standing approximately 22.5 cm tall and made entirely of \u003cstrong\u003egold-finish metal\u003c\/strong\u003e, it naturally finds its place on an executive desk, a bookshelf, or an entryway console. An \u003cstrong\u003eobject for contemplation\u003c\/strong\u003e for those who love to look up at the sky, even in the middle of a workday.\u003c\/p\u003e\n\n\u003ch3 class=\"aa-title\"\u003eThe finish\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-vars\"\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v light\" style=\"background: #C8A84B;\"\u003eGOLD\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eGold\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003eGold-finish metal, translucent green central sphere and beads\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v dark\" style=\"background: linear-gradient(135deg,#C8A84B 0%,#2E6B3F 100%);\"\u003eGOLD AND GREEN\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eSculpture accents\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003eGold orbits and spheres around a translucent green core\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-mat\"\u003e\n\n\u003ch3\u003eFrom armillary sphere to orrery\u003c\/h3\u003e\n\n\u003cp\u003eSince antiquity, astronomers have represented the sky using nested circles. The \u003cstrong\u003earmillary sphere\u003c\/strong\u003e, from the Latin \u003cem\u003earmilla\u003c\/em\u003e (bracelet), assembles rings representing the celestial equator, the ecliptic, and the meridians around a central point. The 18th century saw the appearance of mechanical \u003cstrong\u003eorreries\u003c\/strong\u003e, which rotate small spheres representing the planets around a central Sun, making the system envisioned by Copernicus visible.\u003c\/p\u003e\n\n\u003cp\u003eThis sculpture borrows from both traditions without claiming astronomical accuracy: its concentric rings pivot freely and create ever-changing figures. The movement relies on \u003cstrong\u003erotational inertia\u003c\/strong\u003e: once started, each ring maintains its momentum until friction on its axis gradually stops it. No object can rotate indefinitely without an external energy source; it is precisely this slow, almost solemn deceleration that makes the spectacle so soothing.\u003c\/p\u003e\n\n\u003cp\u003eEach ring has its own axis and mass: when started together, they do not rotate at the same speed. Some stop sooner, while others continue their course, composing a shifting choreography where the \u003cstrong\u003eorbits\u003c\/strong\u003e seem to catch up and then drift apart, much like planets with differing periods of revolution.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eWhy you will love it\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-ben\"\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eHypnotic movement\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe rings cross and shift at different rhythms: no two spins are ever the same.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eAncient instrument allure\u003c\/span\u003e\u003cspan class=\"ds\"\u003eOrbits, spheres, and curved uprights recall the armillary spheres of old astronomy cabinets.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eLuminous gold finish\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe gold metal catches the light and instantly warms up a desk or shelf.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eAn intriguing green core\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe translucent green central sphere and its small beads add an unexpected note of color.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eAnti-stress break\u003c\/span\u003e\u003cspan class=\"ds\"\u003eSpinning the rings and watching them slow down offers a few seconds of breathing room between tasks.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eNo batteries or cables\u003c\/span\u003e\u003cspan class=\"ds\"\u003eA simple manual flick is enough: the object remains silent and autonomous, wherever it is placed.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-des\"\u003e\n\n\u003cp class=\"t\"\u003eA miniature sky on your desk\u003c\/p\u003e\n\n\u003cdiv class=\"x\"\u003e\n\n\u003cp\u003eThere is something profoundly soothing about watching orbits turn. Renaissance astronomers spent nights observing the path of the planets; clockmakers of the Enlightenment dedicated years to reproducing them in brass. This sculpture captures that spirit in a freer form: here, there are no revolution calculations, only the pleasure of \u003cstrong\u003egold curves\u003c\/strong\u003e intersecting.\u003c\/p\u003e\n\n\u003cp\u003ePlaced on a desk, it becomes a ritual. You spin it while picking up the phone, watch it while deep in thought, or spin it again for an intrigued visitor. Its rings always end up stopping in a new position, like a celestial map of a fleeting moment. The \u003cstrong\u003egreen sphere\u003c\/strong\u003e at the center, like a distant planet, catches the eye. It is an object that reminds us, in the heart of daily life, that the entire universe is made of \u003cstrong\u003emovement\u003c\/strong\u003e.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-steps\"\u003e\n\n\u003ch4\u003eSetting the orbits in motion\u003c\/h4\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e1\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eChoose a stable location.\u003c\/strong\u003e Place the sculpture on a flat surface, away from drafts and far from the edge of the desk, leaving space around the rings.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e2\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eLaunch gently.\u003c\/strong\u003e Give one of the rings a light flick with the tip of your finger in the direction of its rotation. A measured gesture is enough: no need to force it.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e3\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eCombine the orbits.\u003c\/strong\u003e Then spin a second ring, in the same or opposite direction, to achieve more complex intersections and figures.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e4\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eObserve and relaunch.\u003c\/strong\u003e Let the rings slow down and freeze in a new configuration, then spin them again at your own pace for a new ballet.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eComparison\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-cmp\"\u003e\n\n\u003ctable\u003e\n\n\u003cthead\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCriterion\u003c\/th\u003e\n\n\u003cth\u003eCelestial Orbit Sculpture\u003c\/th\u003e\n\n\u003cth\u003eClassic Armillary Sphere\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/thead\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003ePurpose\u003c\/td\u003e\n\n\u003ctd\u003eDecorative kinetic object\u003c\/td\u003e\n\n\u003ctd\u003eSky representation instrument\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eMovement\u003c\/td\u003e\n\n\u003ctd\u003eManually spun rotating rings\u003c\/td\u003e\n\n\u003ctd\u003eGenerally fixed or whole-unit rotation\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eAstronomical accuracy\u003c\/td\u003e\n\n\u003ctd\u003eFree interpretation\u003c\/td\u003e\n\n\u003ctd\u003eLabeled celestial circles\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eFinish\u003c\/td\u003e\n\n\u003ctd\u003eGold metal, translucent green accents\u003c\/td\u003e\n\n\u003ctd\u003eOften brass or wood\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eHeight\u003c\/td\u003e\n\n\u003ctd\u003e≈ 22.5 cm\u003c\/td\u003e\n\n\u003ctd\u003eVaries by model\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eIdeal usage\u003c\/td\u003e\n\n\u003ctd\u003eDesk, contemplative break, gift\u003c\/td\u003e\n\n\u003ctd\u003eBookshelf, collection\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/div\u003e\n\n\u003cp\u003eFor other items inspired by the sky, explore our \u003ca href=\"\/collections\/astronomie-et-cartographie\"\u003eastronomy and cartography\u003c\/a\u003e universe, or discover our kinetic objects in \u003ca href=\"\/collections\/physique-et-mouvement\"\u003ephysics and movement\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cdiv class=\"aa-info\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eGood to know:\u003c\/strong\u003e rotation is sustained by the \u003cstrong\u003emomentum\u003c\/strong\u003e you give the rings. As with any mechanical object, friction eventually stops it: the duration of rotation depends on the force of the launch and the position of the rings. The indicated dimensions are read from photos and remain approximate.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-tip\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eTip:\u003c\/strong\u003e place the sculpture near a natural light source or a warm lamp: the gold finish and translucent green sphere become more vibrant, and the moving reflections multiply the hypnotic effect as the rings rotate.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eTechnical specifications\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-sp\"\u003e\n\n\u003ctable\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eType\u003c\/td\u003e\n\n\u003ctd\u003eKinetic desk sculpture\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eInspiration\u003c\/td\u003e\n\n\u003ctd\u003eArmillary sphere, orrery\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\n\u003ctd\u003eGold-finish metal (based on photos)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eFinish\u003c\/td\u003e\n\n\u003ctd\u003eGold\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMoving parts\u003c\/td\u003e\n\n\u003ctd\u003eMultiple concentric pivoting rings\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eSpheres\u003c\/td\u003e\n\n\u003ctd\u003eGold spheres, translucent green central sphere, small green beads\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eSupport\u003c\/td\u003e\n\n\u003ctd\u003eGold rectangular base, two curved uprights\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eHeight\u003c\/td\u003e\n\n\u003ctd\u003e≈ 22.5 cm (photo reading)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eWidth\u003c\/td\u003e\n\n\u003ctd\u003e≈ 22.9 cm (photo reading)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eBase\u003c\/td\u003e\n\n\u003ctd\u003e≈ 5.6 cm depth, ≈ 3.2 cm height (photo reading)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eActivation\u003c\/td\u003e\n\n\u003ctd\u003eManual, no batteries or power source\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eWeight\u003c\/td\u003e\n\n\u003ctd\u003eNot disclosed\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-warn\"\u003e\n\n\u003cp\u003e\u003cstrong\u003ePrecautions:\u003c\/strong\u003e the \u003cstrong\u003esmall beads\u003c\/strong\u003e and spheres are small parts: keep the sculpture out of reach of children under 3 years old. Do not force the rings and do not spin them at high speed: an overly abrupt movement can misalign an axis. Do not lift the object by its orbits; lift it by the base.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-gift\"\u003e\n\n\u003ch3\u003eA dream-worthy gift idea\u003c\/h3\u003e\n\n\u003cp\u003eFor an \u003cstrong\u003eastronomy enthusiast\u003c\/strong\u003e, an executive who loves beautiful desk objects, an architect, a teacher, or a friend who always has their head in the stars, this sculpture is an elegant gift. It stylishly marks a promotion, a departure, a birthday, or a move into a new office.\u003c\/p\u003e\n\n\u003cp\u003eIt also pairs nicely with Father's Day, a birthday for a space lover, or an engineering graduation: a gift that is kept for years on a desk, far from easily forgotten items. Its slow movement invites the recipient to take a moment, and its ancient instrument look makes it fit naturally into both classic and contemporary decor.\u003c\/p\u003e\n\n\u003cp\u003eTo create a complete gift, pair it with another piece from our \u003ca href=\"\/collections\/objets-scientifiques\"\u003escientific objects from The Lab\u003c\/a\u003e.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-faq\"\u003e\n\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eDoes the sculpture rotate indefinitely?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eNo, and no object can: movement without an energy source always ends up stopping due to friction. Despite certain commercial names, this is \u003cstrong\u003enot a perpetual motion machine\u003c\/strong\u003e. The rings spin thanks to the \u003cstrong\u003emomentum\u003c\/strong\u003e you give them, then gradually slow down before coming to a stop. The duration of rotation depends on the force of the spin and the ring chosen. It is precisely this gradual slowing, and the new configuration that results each time, that makes the sculpture so charming. A new flick is all that is needed to restart the ballet of the orbits.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eDoes it require batteries or power?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eNo. The sculpture features \u003cstrong\u003eno motor, no batteries, and no cables\u003c\/strong\u003e: it is animated solely by hand. A light flick on a ring is enough to set it in motion, and you can spin several to multiply the intersections. This complete autonomy is a real advantage for a desk: no wires to hide, no motor noise, and no recharging required. It can be placed anywhere—a desk, living room, or library—and remains ready to spin at any moment to accompany a thought or intrigue a visitor.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhat are its dimensions?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eBased on the measurements visible in the manufacturer's photos, the sculpture is approximately \u003cstrong\u003e22.5 cm high\u003c\/strong\u003e by \u003cstrong\u003e22.9 cm wide\u003c\/strong\u003e. Its rectangular base is approximately 5.6 cm deep and 3.2 cm high. These are \u003cstrong\u003eapproximate readings\u003c\/strong\u003e and may vary slightly. This size makes it a desk object that is visible without being intrusive; it fits well next to a monitor, on a library shelf, or on an entryway console. Just plan for a little space around the rings so they can rotate freely without bumping into other objects.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhat material is it made of?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eBased on the photos, the structure, base, uprights, and rings are made of \u003cstrong\u003egold-finish metal\u003c\/strong\u003e. In the center, a \u003cstrong\u003etranslucent green sphere\u003c\/strong\u003e and small green beads add a touch of color; the manufacturer does not specify their exact material. We do not provide specific composition or alloy information due to lack of reliable data. The gold finish gives the object its ancient instrument look and catches the light particularly well, especially when the rings are in motion. To preserve it, gentle cleaning with a dry cloth is recommended; do not use abrasive products.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eIs this an accurate astronomical model?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eNo: it is a \u003cstrong\u003edecorative sculpture inspired\u003c\/strong\u003e by armillary spheres and orreries, not a scientific instrument. Its rings do not represent actual planetary orbits and do not respect the proportions or periods of the solar system. However, it adopts their visual vocabulary: \u003cstrong\u003enested circles\u003c\/strong\u003e, suspended spheres, and a central star. This is what makes it a beautiful conversation piece: one can discuss Copernicus, 18th-century clockmakers, or celestial mechanics while enjoying an object that is primarily aesthetic and soothing to watch.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eHow do I maintain it?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eRegular, gentle maintenance is enough. Dust the sculpture with a \u003cstrong\u003edry microfiber cloth\u003c\/strong\u003e or a soft-bristled brush, which allows you to reach the areas between the rings. Avoid water, household products, and abrasive cleaners, which could tarnish or scratch the \u003cstrong\u003egold finish\u003c\/strong\u003e. Handle the object by its base rather than by the rings so as not to misalign the axes of rotation. If a ring seems to turn less freely, check that no dust is hindering its axis. Kept away from humidity, the sculpture will retain its luster for a long time.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eIs this a good corporate gift?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eAbsolutely. Elegant, timeless, and without a strong personal connotation, the sculpture is suitable as a \u003cstrong\u003ebusiness gift\u003c\/strong\u003e, for retirement, a promotion, or the inauguration of new premises. It appeals just as much to an executive as to an employee who is passionate about science or design. Its \u003cstrong\u003egold finish\u003c\/strong\u003e gives it immediate presence on a desk, and its movement makes it an object that one will gladly interact with during meetings or phone calls. For a more complete present, you can pair it with another object from our scientific or desk selection.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Atelier Atypique","offers":[{"title":"Default Title","offer_id":54860800852291,"sku":"1005010804098140-as-show","price":89.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0231\/3365\/0991\/files\/S3695e1cc2ab84531a64ceeb720d512db1.webp?v=1791060983"},{"product_id":"demonstrateur-de-force-centripete-rail-a-looping-de-bureau-cyclone","title":"Centripetal force demonstrator, desktop looping track — CYCLONE","description":"\u003cstyle\u003e\n.aa{font-family:Georgia,'Times New Roman',serif;color:#1A1A1A;line-height:1.7;font-size:15px;max-width:760px;margin:0 auto}\n.aa p{margin:0 0 1rem}\n.aa a{color:#185FA5;text-decoration:underline}\n.aa .aa-title{display:inline-block;border-bottom:2px solid 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h3{color:#5C3A1E;font-size:16px;margin:0 0 .6rem}\n.aa .aa-gift p{font-size:14px}\n.aa .aa-faq{margin:1rem 0 1.5rem}\n.aa details.aa-q{border-bottom:1px solid #ebe5d6;padding:.85rem 0}\n.aa details.aa-q summary{font-size:14px;font-weight:700;list-style:none;padding-right:20px;position:relative;cursor:pointer}\n.aa details.aa-q summary::-webkit-details-marker{display:none}\n.aa details.aa-q summary::after{content:\"+\";position:absolute;right:0;top:0;color:#FAC775;font-size:18px;line-height:1}\n.aa details.aa-q[open] summary::after{content:\"\\2212\"}\n.aa .aa-a{font-size:13px;color:#3a3a3a;margin-top:.5rem}\n.aa .aa-a p{margin:0 0 .5rem}\n@media(max-width:600px){.aa .aa-vars,.aa .aa-ben{grid-template-columns:1fr}}\n\u003c\/style\u003e\n\u003cdiv class=\"aa\"\u003e\n\n\u003cp\u003e\u003cspan class=\"aa-badge aa-badge-noir\"\u003eThe Lab\u003c\/span\u003e \u003cspan class=\"aa-badge aa-brun\"\u003eWooden base\u003c\/span\u003e A marble released at the top of a slope, a moment of suspense, then it climbs, goes upside down at the top of a vertical circle, and comes back down without ever falling. This \u003cstrong\u003ecentripetal force demonstrator\u003c\/strong\u003e reenacts the founding experience of roller coasters right on your desk. Its silhouette consists of a single gesture: a \u003cstrong\u003epolished metal rail\u003c\/strong\u003e descending a slope, curling into a \u003cstrong\u003eunique vertical loop\u003c\/strong\u003e, and then shooting toward a small black cap at the end of the course. The whole rests on a \u003cstrong\u003edark wooden rectangular base\u003c\/strong\u003e that gives it the look of an instrument from a cabinet of curiosities. Originally designed as \u003cstrong\u003eeducational physics equipment\u003c\/strong\u003e, it speaks as much to the high schooler discovering \u003cstrong\u003ecircular dynamics\u003c\/strong\u003e as it does to the nostalgic engineer or the simply curious. Each launch poses the same question: why doesn't the marble fall when it is upside down? The answer lies in \u003cstrong\u003espeed\u003c\/strong\u003e, \u003cstrong\u003ecurvature\u003c\/strong\u003e, and a handful of elegant equations that the object suddenly makes tangible. A \u003cstrong\u003edemonstrative desk object\u003c\/strong\u003e, sober and expressive, that turns a Newton's law into a spectacle of a few seconds.\u003c\/p\u003e\n\n\u003ch3 class=\"aa-title\"\u003eThe model\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-vars\"\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v dark\" style=\"background: linear-gradient(135deg,#5C3A1E 0%,#704028 40%,#5C3A1E 70%,#8B5E2A 100%);\"\u003eUNIQUE LOOP\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eUnique model — one loop\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003ePolished metal rail, metal marble, dark wood base\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-mat\"\u003e\n\n\u003ch3\u003eCentripetal force, or the art of turning without falling\u003c\/h3\u003e\n\n\u003cp\u003eAny object in motion tends to continue its path in a straight line: this is the \u003cstrong\u003eprinciple of inertia\u003c\/strong\u003e, formulated by Newton in 1687. For a marble to trace a circle, a force must constantly pull it toward the center: this is the \u003cstrong\u003ecentripetal force\u003c\/strong\u003e, from the Latin \u003cem\u003ecentrum\u003c\/em\u003e (center) and \u003cem\u003epetere\u003c\/em\u003e (to seek). In the loop, this role is played by the rail itself, which pushes the marble inward, aided at the top by gravity. What one feels on a ride as a push toward the outside, the famous \"centrifugal force,\" is merely the manifestation of this inertia seen from the passenger's seat.\u003c\/p\u003e\n\n\u003cp\u003eAt the highest point, the marble only stays pressed against the rail if it is going fast enough: the square of its speed must exceed the product of gravity and the radius of the loop (\u003cstrong\u003ev² ≥ g·R\u003c\/strong\u003e). Below this threshold, the rail stops holding it, and it drops. As early as the 1840s, attractions called \"centrifugal railways\" thrilled the Parisian public with this same principle; the loops of modern amusement parks are their direct heirs.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eWhy you'll love it\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-ben\"\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eA law made visible\u003c\/span\u003e\u003cspan class=\"ds\"\u003eCentripetal force ceases to be a formula on the blackboard: it can be seen, replayed, and discussed in a few seconds.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eLook of an antique instrument\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe polished metal that catches the light and the dark wood of the base compose an object worthy of a library or an engineer's study.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eOne loop, zero distractions\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe path can be read at a glance: a slope, a circle, an exit. Ideal for focusing attention on the essentials.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eNo power supply\u003c\/span\u003e\u003cspan class=\"ds\"\u003eOnly gravity sets the marble in motion: no batteries, no cables, nothing to recharge.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eReady-to-use lesson support\u003c\/span\u003e\u003cspan class=\"ds\"\u003eTeachers, parents, and science communicators have a ready-to-use demonstration for talking about inertia and energy.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eA curiosity magnet\u003c\/span\u003e\u003cspan class=\"ds\"\u003ePlaced on a desk, it draws the hands of visitors and starts conversations better than any paperweight.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-des brun\"\u003e\n\n\u003cp class=\"t\"\u003eFrom the fairground ride to the engineer’s desk\u003c\/p\u003e\n\n\u003cdiv class=\"x\"\u003e\n\n\u003cp\u003eThere is an almost childlike pleasure in watching a marble defy the fall. 19th-century fairground showmen understood this by installing their first looping circuits, where intrepid passengers went upside down to the cheers of the crowd. Physicists saw in it an ideal demonstration of the link between \u003cstrong\u003espeed\u003c\/strong\u003e, \u003cstrong\u003eradius of curvature\u003c\/strong\u003e, and \u003cstrong\u003egravity\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eThis demonstrator takes up this dual lineage. Its unique, clean, and legible loop recalls the engraved plates of mechanics treatises; its dark wood base evokes the demonstration instruments of old science classrooms. On a desk, it becomes a ritual: one releases the marble, holds one's breath, watches it go upside down and return. A little theater of \u003cstrong\u003eNewtonian mechanics\u003c\/strong\u003e, replayed at will, reminding us that the laws of nature are as beautiful as they are exact.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-steps\"\u003e\n\n\u003ch4\u003eStaging the loop in four steps\u003c\/h4\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e1\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eChoose the location.\u003c\/strong\u003e Place the base on a perfectly flat and stable surface: an inclined or wobbly table alters the trajectory and may prevent the marble from completing its loop.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e2\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003ePosition the marble at the start.\u003c\/strong\u003e Place the metal marble at the very top of the slope, immobile, holding it with your fingertip.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e3\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eRelease without pushing.\u003c\/strong\u003e Simply open your finger: gravity is enough. A push would distort the experiment by adding initial velocity.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e4\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eObserve and vary.\u003c\/strong\u003e Follow the marble through the loop and then to the black cap. Repeat by releasing it lower down the slope to discover the point at which it no longer clears the summit.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eComparison\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-cmp\"\u003e\n\n\u003ctable\u003e\n\n\u003cthead\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCriteria\u003c\/th\u003e\n\n\u003cth\u003eThis model (one loop)\u003c\/th\u003e\n\n\u003cth\u003eSingle or double loop rail\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/thead\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eNumber of loops\u003c\/td\u003e\n\n\u003ctd\u003eOne, vertical\u003c\/td\u003e\n\n\u003ctd\u003eOne or two depending on version\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eRail\u003c\/td\u003e\n\n\u003ctd\u003eMetal, polished steel appearance\u003c\/td\u003e\n\n\u003ctd\u003eV-profile aluminum\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eBase\u003c\/td\u003e\n\n\u003ctd\u003eRectangular dark wood\u003c\/td\u003e\n\n\u003ctd\u003eWood, length ≈ 40 cm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eMarble(s)\u003c\/td\u003e\n\n\u003ctd\u003eMetal marble shown\u003c\/td\u003e\n\n\u003ctd\u003eSteel marble and 2.5 cm plastic marble\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eEnd of course\u003c\/td\u003e\n\n\u003ctd\u003eSmall black cap\u003c\/td\u003e\n\n\u003ctd\u003eMarble catch net\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\n\u003ctd\u003eNot provided\u003c\/td\u003e\n\n\u003ctd\u003eLoop radius ≈ 7 cm (and ≈ 3.5 cm)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eIdeal usage\u003c\/td\u003e\n\n\u003ctd\u003eDemonstrative desk object\u003c\/td\u003e\n\n\u003ctd\u003eComparative experiments in class\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/div\u003e\n\n\u003cp\u003eBoth demonstrators tell the same physics story with different temperaments: this one focuses on the legibility of a single loop, the other on experimentation. To compose a real science corner, browse all of our \u003ca href=\"\/collections\/objets-scientifiques\"\u003escientific objects from The Lab\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cdiv class=\"aa-info\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eGood to know:\u003c\/strong\u003e this demonstrator is sourced from \u003cstrong\u003ephysics teaching equipment\u003c\/strong\u003e. Its exact dimensions and weight are not provided by the manufacturer; this sheet sticks to what the product photo shows: a single-loop rail on a dark wood base, presented with a metal marble.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-tip\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eTip:\u003c\/strong\u003e before each demonstration, wipe the rail and the marble with a dry microfiber cloth. A fingerprint or a grain of dust is enough to slow the marble down and make it miss the summit. A small spirit level placed on the base ensures perfect horizontality.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eTechnical characteristics\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-sp\"\u003e\n\n\u003ctable\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eType\u003c\/td\u003e\n\n\u003ctd\u003eCentripetal force demonstrator (looping rail)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eNumber of loops\u003c\/td\u003e\n\n\u003ctd\u003eOne vertical loop\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eRail\u003c\/td\u003e\n\n\u003ctd\u003eMetal, shiny polished steel appearance\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMarble\u003c\/td\u003e\n\n\u003ctd\u003eMetal (shown in product photo)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eBase\u003c\/td\u003e\n\n\u003ctd\u003eDark wood, rectangular shape\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eEnd of course\u003c\/td\u003e\n\n\u003ctd\u003eSmall black cap at the end of the rail\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eOperation\u003c\/td\u003e\n\n\u003ctd\u003eGravity only, no power source\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eConcepts illustrated\u003c\/td\u003e\n\n\u003ctd\u003eInertia, centripetal force, potential and kinetic energy\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eUsage\u003c\/td\u003e\n\n\u003ctd\u003eClassroom demonstration, desk object\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\n\u003ctd\u003eNot provided\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eWeight\u003c\/td\u003e\n\n\u003ctd\u003eNot provided\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDelivery assembled or in kit\u003c\/td\u003e\n\n\u003ctd\u003eNot provided\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-warn\"\u003e\n\n\u003cp\u003e\u003cstrong\u003ePrecautions:\u003c\/strong\u003e the marble is a \u003cstrong\u003esmall part\u003c\/strong\u003e that can be swallowed: this demonstrator is not suitable for children under 3 years old and should be used under adult supervision with younger ones. Do not force the rail: a deformed loop will no longer guide the marble correctly. Do not throw the marble by hand off the path.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-gift\"\u003e\n\n\u003ch3\u003eA gift idea that goes full circle\u003c\/h3\u003e\n\n\u003cp\u003eFor a \u003cstrong\u003ephysics teacher\u003c\/strong\u003e at the end of the school year, an engineering student, a mechanics enthusiast, or a colleague who has everything, this demonstrator is a gift that gets noticed and shared. It also accompanies a retirement, a new desk, or a baccalaureate success with a touch of scholarly humor.\u003c\/p\u003e\n\n\u003cp\u003eTo extend the pleasure, pair it with a puzzle or an intriguing desk object from our \u003ca href=\"\/collections\/casse-tetes-et-bureau\"\u003epuzzles and desk objects\u003c\/a\u003e collection, or explore the other \u003ca href=\"\/collections\/physique-et-mouvement\"\u003ephysics and movement\u003c\/a\u003e experiments from The Lab.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-faq\"\u003e\n\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhy doesn't the marble fall at the top of the loop?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eBecause it's going fast enough. At the summit, the marble needs a \u003cstrong\u003eforce directed toward the center\u003c\/strong\u003e to continue turning. As long as its speed is sufficient, gravity alone is not enough to provide this force: the rail must still push it inward, which keeps it pressed against it. If the speed drops below the threshold defined by \u003cstrong\u003ev² = g·R\u003c\/strong\u003e, gravity becomes \"too strong\" for the circular trajectory and the marble leaves the rail. This is exactly what ensures passenger safety in an amusement park loop: the entry speed is calculated with a large margin.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eDoes it need batteries or an electrical power supply?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eNo. The demonstrator works \u003cstrong\u003esolely thanks to gravity\u003c\/strong\u003e. The energy the marble needs to travel through the loop is provided by the starting height: by descending the slope, it converts its potential energy into speed, then spends part of this speed to climb back to the top of the circle. No motor, no battery, no cable is involved. This is precisely what makes the experiment so expressive: everything observed stems from the initial height, the shape of the rail, and friction. Simply place the object on a flat surface to be ready for use, at any time.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhat is the difference with The Lab’s single or double looping rail?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eBoth objects illustrate \u003cstrong\u003ecentripetal force\u003c\/strong\u003e, but they are not aimed at the same use. This model focuses on \u003cstrong\u003ea single loop\u003c\/strong\u003e: its path can be understood at a glance, making it a demonstrative desk object and an excellent starting point for a discussion. The other demonstrator, more laboratory-oriented, offers a version with two loops of different radii, two marbles of different materials, and a catch net, to multiply comparative trials. If you are looking for a sober object to display and have people try, this one is ideal; for a complete practical session, the other will be richer.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhat happens if the marble doesn't clear the loop?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eThat is an experiment in itself. If the marble is released too low on the slope, it does not accumulate enough speed: it climbs into the loop, slows down, then \u003cstrong\u003edrops before the summit\u003c\/strong\u003e and falls back. In theory, for a marble that slides without friction, you would need to start from a height at least equal to \u003cstrong\u003etwo and a half times the radius\u003c\/strong\u003e of the loop; a marble that rolls must start a little higher, because part of its energy is used to make it spin on itself. Also, check that the base is perfectly horizontal and that the rail is clean: dust or a slight tilt is enough to make a pass fail.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eCan it be used in class or with children?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eYes, that is its primary vocation: it is \u003cstrong\u003ephysics teaching equipment\u003c\/strong\u003e. In middle school, it simply illustrates the conversion between height and speed; in high school and higher education, it allows for approaching \u003cstrong\u003eNewton's second law in circular motion\u003c\/strong\u003e, the concept of support reaction, and the condition for clearing the summit. With young children, the object is fascinating, but it must remain under adult supervision: the marble is a small part that can be swallowed, and the demonstrator is not suitable for those under 3. For older ones, it is a great starting point for asking questions and formulating hypotheses.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhat are the dimensions of the demonstrator?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eThe manufacturer \u003cstrong\u003edoes not provide dimensions or weight\u003c\/strong\u003e for this model, and we prefer not to offer approximate figures. The product photo shows a set composed of a slope, a single vertical loop, and an exit rail fixed to a \u003cstrong\u003erectangular dark wood base\u003c\/strong\u003e, with a metal marble and a small black cap at the end of the course. If space is a deciding factor for you, for example for a specific shelf or display case, write to us before your order: we will provide any additional information we have on this object.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eHow do I maintain the rail and the marble?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eMaintenance is minimal. Regularly dust the rail with a \u003cstrong\u003edry microfiber cloth\u003c\/strong\u003e, following the entire length of the loop, and wipe the marble in the same way: fingerprints and dust create friction that slows the marble down. Avoid aggressive household products and water on the \u003cstrong\u003ewooden base\u003c\/strong\u003e, which could stain or swell. Keep the marble near the object, in a small dish for example, so as not to lose it. Finally, handle the demonstrator by the base rather than the loop: it is the precise geometry of the rail that ensures successful passes.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Atelier Atypique","offers":[{"title":"Default Title","offer_id":54860801474883,"sku":"1005009392089083-Default-Title","price":119.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0231\/3365\/0991\/files\/Sf719fd3c457d47dda14a9827b529f1a3X.webp?v=1791060883"},{"product_id":"moteur-stirling-bicylindre-avec-generateur-et-led-castor","title":"Two-cylinder Stirling engine with generator and LED — CASTOR","description":"\u003cstyle\u003e\n.aa{font-family:Georgia,'Times New Roman',serif;color:#1A1A1A;line-height:1.7;font-size:15px;max-width:760px;margin:0 auto}\n.aa p{margin:0 0 1rem}\n.aa a{color:#185FA5;text-decoration:underline}\n.aa .aa-title{display:inline-block;border-bottom:2px solid 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h3{color:#5C3A1E;font-size:16px;margin:0 0 .6rem}\n.aa .aa-gift p{font-size:14px}\n.aa .aa-faq{margin:1rem 0 1.5rem}\n.aa details.aa-q{border-bottom:1px solid #ebe5d6;padding:.85rem 0}\n.aa details.aa-q summary{font-size:14px;font-weight:700;list-style:none;padding-right:20px;position:relative;cursor:pointer}\n.aa details.aa-q summary::-webkit-details-marker{display:none}\n.aa details.aa-q summary::after{content:\"+\";position:absolute;right:0;top:0;color:#FAC775;font-size:18px;line-height:1}\n.aa details.aa-q[open] summary::after{content:\"\\2212\"}\n.aa .aa-a{font-size:13px;color:#3a3a3a;margin-top:.5rem}\n.aa .aa-a p{margin:0 0 .5rem}\n@media(max-width:600px){.aa .aa-vars,.aa .aa-ben{grid-template-columns:1fr}}\n\u003c\/style\u003e\n\u003cdiv class=\"aa\"\u003e\n\n\u003cp\u003e\u003cspan class=\"aa-badge aa-badge-noir\"\u003eHot air engine\u003c\/span\u003e \u003cspan class=\"aa-badge aa-badge-brun\"\u003eWooden base\u003c\/span\u003e Two cylinders, a flame, and the mechanics awaken. This \u003cstrong\u003etwin-cylinder Stirling engine\u003c\/strong\u003e is a true \u003cstrong\u003ehot air engine\u003c\/strong\u003e in miniature: heated by two glass \u003cstrong\u003ealcohol lamps\u003c\/strong\u003e, its \u003cstrong\u003ehorizontal cylinders\u003c\/strong\u003e set a rocker, connecting rods, and a red spoked \u003cstrong\u003eflywheel\u003c\/strong\u003e in motion. This movement in turn drives a small \u003cstrong\u003egenerator\u003c\/strong\u003e that lights an \u003cstrong\u003eLED\u003c\/strong\u003e: in a few moments, heat becomes movement, then electricity, right before your eyes. Mounted on a \u003cstrong\u003elight wood base\u003c\/strong\u003e, the assembly combines the precision of \u003cstrong\u003emetallic\u003c\/strong\u003e parts with the charm of a scientific cabinet object. Two finishes are available, silver or brass-style gold, at 1:12 scale according to the manufacturer. Recommended for ages 14 and up, this model is aimed at mechanical enthusiasts, teachers, engineers, and anyone who loves to see physics in action, whether on a desk or a bookshelf.\u003c\/p\u003e\n\n\u003ch3 class=\"aa-title\"\u003eAvailable finishes\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-vars\"\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v light\" style=\"background: #9A9A9A;\"\u003eSILVER\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eSilver\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003eSilver-colored cylinders and mechanical parts, red flywheel, light wood base\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v light\" style=\"background: #C8A84B;\"\u003eGOLD\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eGold\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003eBrass-style gold finish mechanical parts, red flywheel, light wood base\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-mat\"\u003e\n\n\u003ch3\u003eThe Stirling cycle: when heat becomes movement\u003c\/h3\u003e\n\n\u003cp\u003eInvented in 1816 by the Scottish clergyman \u003cstrong\u003eRobert Stirling\u003c\/strong\u003e, this engine works without explosions or valves: a fixed volume of gas, in this case air, is trapped in the engine and alternately \u003cstrong\u003eheated and cooled\u003c\/strong\u003e. When heated, the air expands and pushes a piston; when cooled, it contracts and the piston returns. The temperature difference between the hot part, above the flame, and the cold part is enough to maintain continuous movement, transmitted by connecting rods to the \u003cstrong\u003eflywheel\u003c\/strong\u003e, whose momentum regulates the rotation.\u003c\/p\u003e\n\n\u003cp\u003eIn the \u003cstrong\u003etwin-cylinder\u003c\/strong\u003e configuration, the pistons work in an offset manner, making the movement more regular and more spectacular to observe. The Stirling engine is renowned for its quiet operation and its ability to harness almost any heat source; it is currently studied for energy recovery and solar power. The small \u003cstrong\u003egenerator\u003c\/strong\u003e added to this model illustrates the final stage of the chain: thermal energy becomes mechanical, then electrical.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eWhy you will love it\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-ben\"\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eA real heat engine\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThis is no simple model: the flame actually makes the engine turn.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eTwo cylinders in action\u003c\/span\u003e\u003cspan class=\"ds\"\u003ePistons, rods, and rocker arm animate in rhythm for a fascinating mechanical show.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eFrom heat to light\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe driven generator lights an LED: the entire energy conversion chain in one object.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eA teaching tool\u003c\/span\u003e\u003cspan class=\"ds\"\u003eIdeal for explaining thermodynamics, gas expansion, and energy conservation.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eTwo elegant finishes\u003c\/span\u003e\u003cspan class=\"ds\"\u003eSilver for a technical style, brass-style gold for a cabinet-of-curiosities feel.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eA light wood base\u003c\/span\u003e\u003cspan class=\"ds\"\u003eA warm base that turns the machine into a beautiful desk object.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-des\"\u003e\n\n\u003cp class=\"t\"\u003eTwo centuries of mechanical genius\u003c\/p\u003e\n\n\u003cdiv class=\"x\"\u003e\n\n\u003cp\u003eIn 1816, during the height of the Industrial Revolution, steam engines were exploding regularly. \u003cstrong\u003eRobert Stirling\u003c\/strong\u003e then imagined a safer engine, without a pressurized boiler, requiring only a heat source and a little trapped air. Two centuries later, his invention continues to inspire engineers and researchers.\u003c\/p\u003e\n\n\u003cp\u003eThis twin-cylinder model offers a desk-sized version, featuring the most fascinating aspects of mechanics: the \u003cstrong\u003eballet of the rods\u003c\/strong\u003e, the oscillating rocker, the red flywheel gaining momentum, and that little LED lighting up like a reward.\u003c\/p\u003e\n\n\u003cp\u003eLight the lamps, wait a few moments, and give the flywheel a nudge: the machine comes to life with a light ticking. This is exactly what we love to gather in our \u003ca href=\"\/collections\/physique-et-mouvement\"\u003ePhysics \u0026amp; Movement\u003c\/a\u003e collection: objects that aren't just beautiful, but actually work.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-steps\"\u003e\n\n\u003ch4\u003eStarting the engine\u003c\/h4\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e1\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003ePlace it on a stable surface.\u003c\/strong\u003e A flat, non-flammable table, cleared of any paper or fabric, away from drafts.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e2\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003ePrepare the lamps.\u003c\/strong\u003e Fill the alcohol lamps with methylated spirits (not included) without exceeding two-thirds, then close and wipe clean.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e3\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eHeat then start.\u003c\/strong\u003e Light the wicks under the cylinders, wait for the air to heat up, then give the flywheel a light push.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e4\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eObserve, then extinguish.\u003c\/strong\u003e Admire the rotation and the LED, then cap the lamps and let them cool before touching.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eComparison: which Stirling engine to choose?\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-cmp\"\u003e\n\n\u003ctable\u003e\n\n\u003cthead\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCriteria\u003c\/th\u003e\n\n\u003cth\u003eTwin-cylinder with generator (this model)\u003c\/th\u003e\n\n\u003cth\u003eLabo low-temperature Stirling\u003c\/th\u003e\n\n\u003cth\u003eLabo Stirling assembly kit\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/thead\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eHeat source\u003c\/td\u003e\n\n\u003ctd\u003eTwo alcohol lamps\u003c\/td\u003e\n\n\u003ctd\u003eSmall temperature difference (hand, hot cup)\u003c\/td\u003e\n\n\u003ctd\u003eVaries by model\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eMechanical spectacle\u003c\/td\u003e\n\n\u003ctd\u003eTwo cylinders, rocker, red flywheel\u003c\/td\u003e\n\n\u003ctd\u003eSlow and silent movement\u003c\/td\u003e\n\n\u003ctd\u003ePleasure of assembly\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eElectricity production\u003c\/td\u003e\n\n\u003ctd\u003eYes, generator and LED\u003c\/td\u003e\n\n\u003ctd\u003eSee specific product page\u003c\/td\u003e\n\n\u003ctd\u003eSee specific product page\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eOpen flame\u003c\/td\u003e\n\n\u003ctd\u003eYes\u003c\/td\u003e\n\n\u003ctd\u003eNo\u003c\/td\u003e\n\n\u003ctd\u003eVaries by model\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eIdeal audience\u003c\/td\u003e\n\n\u003ctd\u003eMechanical enthusiasts, teachers (14+)\u003c\/td\u003e\n\n\u003ctd\u003eDesk, gentle demonstration\u003c\/td\u003e\n\n\u003ctd\u003eDIYers, model makers\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-info\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eGood to know:\u003c\/strong\u003e a Stirling engine does not start instantly. The cylinders must be allowed to heat for a few moments to create a sufficient temperature difference, then the flywheel must be started by hand. The engine only turns as long as the flame is maintained; it stops on its own when the lamps are extinguished and the cylinders cool down. This is in no way a perpetual motion machine.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-tip\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eTip:\u003c\/strong\u003e for a demonstration in a classroom or in front of guests, dim the room lights: the little generator LED becomes clearly visible and makes the energy conversion very clear. If the flywheel struggles to start, wait a few more seconds before restarting, and check that the wicks are centered under the cylinders.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eTechnical specifications\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-sp\"\u003e\n\n\u003ctable\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eType\u003c\/td\u003e\n\n\u003ctd\u003eHot air Stirling engine, two horizontal cylinders\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eFinishes\u003c\/td\u003e\n\n\u003ctd\u003eSilver · Brass-style gold\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\n\u003ctd\u003eMetal; light wood base\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eFlywheel\u003c\/td\u003e\n\n\u003ctd\u003eRed, spoked\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eGenerator\u003c\/td\u003e\n\n\u003ctd\u003eDriven by the engine, powers an LED\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eHeat source\u003c\/td\u003e\n\n\u003ctd\u003eTwo glass alcohol lamps (visible in photos)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eFuel\u003c\/td\u003e\n\n\u003ctd\u003eMethylated spirits, not included\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eAnnounced scale\u003c\/td\u003e\n\n\u003ctd\u003e1:12 (according to manufacturer)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eApproximate dimensions\u003c\/td\u003e\n\n\u003ctd\u003eAbout 17.5 × 9.5 cm base, 13 cm height\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eRecommended age\u003c\/td\u003e\n\n\u003ctd\u003e14 years and older\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eAnnounced compliance\u003c\/td\u003e\n\n\u003ctd\u003eCE (according to manufacturer)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDelivery\u003c\/td\u003e\n\n\u003ctd\u003eAssembled or kit (not specified)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-warn\"\u003e\n\n\u003cp\u003e\u003cstrong\u003ePrecautions — open flame:\u003c\/strong\u003e never leave the engine running unattended. Use on a stable, non-flammable surface, away from curtains, paper, and flammable materials. Fill lamps only when flames are extinguished and lamps are cold, and store alcohol out of reach of children. The cylinders remain burning hot for several minutes after extinguishing: do not touch. Small parts: not suitable for children under 14 without adult supervision.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-gift\"\u003e\n\n\u003ch3\u003eA gift that makes engineers' eyes shine\u003c\/h3\u003e\n\n\u003cp\u003eFor an engineer, a physics professor, a mechanical student, a fan of steam and vintage machines, or a curious young person over 14, this engine is a rare gift: it is meant to be admired, demonstrated, and always sparks questions. It marks a graduation, retirement, Father's Day, or a birthday.\u003c\/p\u003e\n\n\u003cp\u003eTo extend the discovery, explore the entire \u003ca href=\"\/collections\/objets-scientifiques\"\u003eLabo d'Atelier Atypique\u003c\/a\u003e, with its other Stirling engines, pendulums, and moving objects, or our \u003ca href=\"\/collections\/bureau-et-hi-tech\"\u003eDesk \u0026amp; Hi-tech\u003c\/a\u003e selection.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-faq\"\u003e\n\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eHow does this Stirling engine work?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eThe Stirling engine is a \u003cstrong\u003ehot air engine\u003c\/strong\u003e: air trapped in the cylinders is alternately heated by the flame of alcohol lamps and cooled on the opposite side. By expanding, the air pushes a piston; by contracting, it lets it return. This back-and-forth motion is transmitted by the \u003cstrong\u003erods\u003c\/strong\u003e to the \u003cstrong\u003eflywheel\u003c\/strong\u003e, whose momentum regulates the rotation. On this twin-cylinder model, the two pistons work in an offset manner for smoother movement. The rotation finally drives a small \u003cstrong\u003egenerator\u003c\/strong\u003e that lights an LED, illustrating the transition from thermal energy to mechanical then electrical energy.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eIs the alcohol included?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eNo, \u003cstrong\u003efuel is not included\u003c\/strong\u003e. The photos show two \u003cstrong\u003eglass alcohol lamps\u003c\/strong\u003e placed under the cylinders; they are used with commercial \u003cstrong\u003emethylated spirits\u003c\/strong\u003e, available in supermarkets or hardware stores. Fill each lamp without exceeding two-thirds, always when flames are extinguished and lamps are cold, then close carefully and wipe away any spills before lighting. Keep the alcohol bottle closed, away from any flame, and out of reach of children. Never use gasoline, lighter fluid, or any other fuel not intended for this type of lamp.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eIs the engine delivered assembled?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eThe manufacturer does not specify if the engine is delivered \u003cstrong\u003efully assembled\u003c\/strong\u003e or as an \u003cstrong\u003eassembly kit\u003c\/strong\u003e, and we prefer not to confirm on their behalf. The supplier page mentions a set of twenty elements, which may correspond to the engine parts, lamps, and accessories. In any case, take the time to check the tightness of the parts and the free movement of the flywheel before the first start. If you specifically want a model to build yourself, the Labo also offers a \u003cstrong\u003eStirling assembly kit\u003c\/strong\u003e, designed for the pleasure of building.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eCan the engine run indefinitely?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eNo. The Stirling engine is not a \u003cstrong\u003eperpetual motion machine\u003c\/strong\u003e, which would be physically impossible: it needs a \u003cstrong\u003eheat source\u003c\/strong\u003e to function. As long as the alcohol lamps burn and the temperature difference between the hot and cold parts of the cylinders is sufficient, it runs steadily. As soon as the flame goes out, the cylinders cool down, the temperature gap decreases, and the flywheel slows down until it stops. The operating time therefore depends on the amount of alcohol in the lamps. Do not extend demonstrations beyond reason and let cool between uses.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhat is the difference between the silver and gold finishes?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eBoth finishes share the same mechanics, the same \u003cstrong\u003ered spoked flywheel\u003c\/strong\u003e, the same generator with LED, and the same \u003cstrong\u003elight wood base\u003c\/strong\u003e. Only the appearance of the metallic parts changes. The \u003cstrong\u003eSilver\u003c\/strong\u003e version features silver-colored cylinders and parts for a technical and contemporary look, which suits a modern office. The \u003cstrong\u003eGold\u003c\/strong\u003e version sports a brass-style finish, warmer, evoking antique scientific instruments and curiosity cabinets. The choice is therefore primarily aesthetic: consider the decor of the room where the engine will be displayed.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eIs this engine suitable for educational use?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eYes, that is one of its major strengths. This engine allows for concrete illustration of \u003cstrong\u003egas expansion\u003c\/strong\u003e, the \u003cstrong\u003ethermodynamic cycle\u003c\/strong\u003e, motion transmission via rods, and \u003cstrong\u003eenergy conversion\u003c\/strong\u003e: thermal, then mechanical, then electrical thanks to the generator and its LED. It interests physics and technology teachers, science clubs, and curious families. The manufacturer recommends it for ages \u003cstrong\u003e14 and up\u003c\/strong\u003e. In the presence of students or children, the demonstration must always be conducted by an adult, due to the open flame and hot parts.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eHow do I maintain the Stirling engine?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eAlways let the engine \u003cstrong\u003ecool completely\u003c\/strong\u003e before handling or cleaning. Dust off the mechanical parts with a soft brush or a dry cloth, and wipe the wooden base with a slightly damp cloth, without aggressive products. If the movement becomes less fluid, a drop of fine oil on the joints can help, avoiding the cylinders. Empty the alcohol lamps if the engine is to remain unused for a long time, and store it away from dust. Regularly check the condition of the wicks and replace them if they are too worn to ensure a stable flame.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Atelier Atypique","offers":[{"title":"Money","offer_id":54860801605955,"sku":"1005004879058245-Silver","price":119.9,"currency_code":"EUR","in_stock":true},{"title":"Golden","offer_id":54860801638723,"sku":"1005004879058245-Golden","price":119.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0231\/3365\/0991\/files\/Sfa3718df67d145db9228453f6838a150i.webp?v=1791060849"},{"product_id":"maquette-reacteur-d-avion-turbofan-en-coupe-kit-3d-aeros","title":"Turbofan aircraft engine cross-section model, 3D kit — AEROS","description":"\u003cstyle\u003e\n.aa{font-family:Georgia,'Times New Roman',serif;color:#1A1A1A;line-height:1.7;font-size:15px;max-width:760px;margin:0 auto}\n.aa p{margin:0 0 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.aa-gift{background:linear-gradient(135deg,#FFFDF7,#FFF9E8);border:1px solid #FAC775;border-radius:10px;padding:1.3rem 1.5rem;margin:1.5rem 0}\n.aa .aa-gift h3{color:#5C3A1E;font-size:16px;margin:0 0 .6rem}\n.aa .aa-gift p{font-size:14px}\n.aa .aa-faq{margin:1rem 0 1.5rem}\n.aa details.aa-q{border-bottom:1px solid #ebe5d6;padding:.85rem 0}\n.aa details.aa-q summary{font-size:14px;font-weight:700;list-style:none;padding-right:20px;position:relative;cursor:pointer}\n.aa details.aa-q summary::-webkit-details-marker{display:none}\n.aa details.aa-q summary::after{content:\"+\";position:absolute;right:0;top:0;color:#FAC775;font-size:18px;line-height:1}\n.aa details.aa-q[open] summary::after{content:\"\\2212\"}\n.aa .aa-a{font-size:13px;color:#3a3a3a;margin-top:.5rem}\n.aa .aa-a p{margin:0 0 .5rem}\n@media(max-width:600px){.aa .aa-vars,.aa .aa-ben{grid-template-columns:1fr}}\n\u003c\/style\u003e\n\u003cdiv class=\"aa\"\u003e\n\n\u003cp\u003e\u003cspan class=\"aa-badge aa-badge-noir\"\u003eAssembly kit\u003c\/span\u003e \u003cspan class=\"aa-badge aa-badge-brun\"\u003e3D printing\u003c\/span\u003e Immerse yourself in the heart of an airliner with this \u003cstrong\u003ecutaway turbofan jet engine model\u003c\/strong\u003e, for you to assemble yourself. Its parts are \u003cstrong\u003e3D printed\u003c\/strong\u003e in \u003cstrong\u003emetallic-finish PLA\u003c\/strong\u003e: the \u003cstrong\u003eblades\u003c\/strong\u003e and casings take on \u003cstrong\u003ecopper and silver\u003c\/strong\u003e highlights, the inlet cone shines like polished metal, and the whole assembly rests on a \u003cstrong\u003eblack base\u003c\/strong\u003e that presents it like a museum piece. The cutaway reveals the architecture of the high-bypass engine: the large fan at the front, followed by the compressor stages, the combustion chamber, and the turbine. Once assembled, a \u003cstrong\u003esmall battery-powered motor\u003c\/strong\u003e spins the blades, allowing you to understand at a glance how air is drawn in, compressed, and ejected. Delivered in a \u003cstrong\u003eblack box\u003c\/strong\u003e with its parts secured in foam, this kit, measuring approximately 28 × 15 × 10 cm, will appeal to aviation enthusiasts, engineers, and anyone who enjoys understanding how machines work. A desktop object that is as educational as it is decorative.\u003c\/p\u003e\n\n\u003ch3 class=\"aa-title\"\u003eVersion and finish\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-vars\"\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v dark\" style=\"background: linear-gradient(135deg,#1A1A1A 0%,#704028 60%,#9A9A9A 100%);\"\u003eASSEMBLY KIT\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eAssembly kit\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003e3D printed parts with metallic finish, arranged in a black foam-lined box, black base\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v dark\" style=\"background: linear-gradient(135deg,#8B5E2A 0%,#C88A4B 50%,#9A9A9A 100%);\"\u003eCOPPER \u0026amp; SILVER FINISH\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eCopper and silver finish\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003eCopper and metallic silver blades and casings, silver cone, black base\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-mat\"\u003e\n\n\u003ch3\u003eThe turbofan, engine of airliners\u003c\/h3\u003e\n\n\u003cp\u003eThe \u003cstrong\u003ehigh-bypass turbofan\u003c\/strong\u003e engine powers almost all modern airliners. At the front, a large \u003cstrong\u003efan\u003c\/strong\u003e draws in a huge amount of air. A small portion of this air, the \u003cstrong\u003ecore flow\u003c\/strong\u003e, enters the heart of the engine: it is compressed by several compressor stages, mixed with fuel, and burned in the combustion chamber. The hot gases then pass through the turbine, which recovers part of their energy to drive the compressor and fan, before being ejected toward the rear.\u003c\/p\u003e\n\n\u003cp\u003eMost of the air, the \u003cstrong\u003ebypass flow\u003c\/strong\u003e, bypasses the engine core and is simply accelerated by the fan. This provides the bulk of the thrust in modern engines, while reducing fuel consumption and noise. The ratio between these two flows, known as the bypass ratio, is one of the major advances in civil aviation since the 1960s. This cutaway model allows you to visualize these two paths of air and the sequence of stages.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eWhy you'll love it\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-ben\"\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eA cutaway view\u003c\/span\u003e\u003cspan class=\"ds\"\u003eFan, compressor, combustion, turbine: the inside of the jet engine becomes clear.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eRotating blades\u003c\/span\u003e\u003cspan class=\"ds\"\u003eA battery-operated motor sets the blades in rotation for a vivid demonstration.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eThe pleasure of assembly\u003c\/span\u003e\u003cspan class=\"ds\"\u003eAssembling the engine yourself means understanding the role of every part.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eA metallic finish\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe metallic-surface PLA provides copper and silver highlights worthy of an exhibition model.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eA polished case\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe parts arrive arranged in foam, inside an elegant black box.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eA striking desk object\u003c\/span\u003e\u003cspan class=\"ds\"\u003eOn its black base, it stands out as a collector's item for aviation enthusiasts.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-des\"\u003e\n\n\u003cp class=\"t\"\u003eThe art of engineering at desk scale\u003c\/p\u003e\n\n\u003cdiv class=\"x\"\u003e\n\n\u003cp\u003eYou only need to have seen a jet engine up close, on the tarmac or in an air museum, to remember that impression of power: a \u003cstrong\u003ering of blades\u003c\/strong\u003e perfectly aligned, tolerances to within a tenth of a millimeter, and behind it, a whole hidden world.\u003c\/p\u003e\n\n\u003cp\u003eThis cutaway model makes that world visible. The blades, stages, and casings reveal themselves layer by layer, and the \u003cstrong\u003emetallic finish\u003c\/strong\u003e evokes the titanium and alloys of real engines. 3D printing, an additive manufacturing technique now used even in the aeronautics industry, adds a modern touch to the object.\u003c\/p\u003e\n\n\u003cp\u003eOnce assembled, it sits on a desk like an engineer's trophy. It naturally joins our \u003ca href=\"\/collections\/physique-et-mouvement\"\u003ePhysics \u0026amp; Motion\u003c\/a\u003e collection, where every object elegantly recounts a mechanical principle.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-steps\"\u003e\n\n\u003ch4\u003eFrom box to demonstration\u003c\/h4\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e1\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eInventory the parts.\u003c\/strong\u003e Gently remove the elements from their foam and lay them out on a clean, clear surface.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e2\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eAssemble step by step.\u003c\/strong\u003e Mount the base, then the engine stages in order, being careful not to force the thinner blades.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e3\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eInstall the batteries.\u003c\/strong\u003e Place the appropriate batteries into the electric motor housing, ensuring correct polarity.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e4\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eStart the rotation.\u003c\/strong\u003e Watch the blades spin and follow the air's journey, from the fan to the exhaust nozzle.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eComparison with other Lab models\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-cmp\"\u003e\n\n\u003ctable\u003e\n\n\u003cthead\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eCriteria\u003c\/th\u003e\n\n\u003cth\u003eTurbofan engine model\u003c\/th\u003e\n\n\u003cth\u003eStirling demo engine\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/thead\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003ePrinciple illustrated\u003c\/td\u003e\n\n\u003ctd\u003eAeronautical high-bypass propulsion\u003c\/td\u003e\n\n\u003ctd\u003eHot air engine, thermodynamic cycle\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eSource of motion\u003c\/td\u003e\n\n\u003ctd\u003eSmall battery-operated electric motor\u003c\/td\u003e\n\n\u003ctd\u003eHeat (flame or heat source depending on model)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eActual engine operation\u003c\/td\u003e\n\n\u003ctd\u003eNo: visual demonstration of rotation\u003c\/td\u003e\n\n\u003ctd\u003eYes: the engine actually functions\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eManufacturing\u003c\/td\u003e\n\n\u003ctd\u003e3D printing, metallic-surface PLA\u003c\/td\u003e\n\n\u003ctd\u003eMetal parts\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eAssembly\u003c\/td\u003e\n\n\u003ctd\u003eAssembly kit\u003c\/td\u003e\n\n\u003ctd\u003eDepends on model\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eIdeal audience\u003c\/td\u003e\n\n\u003ctd\u003eAviation enthusiasts, engineers, modelers\u003c\/td\u003e\n\n\u003ctd\u003eThose curious about physics and thermodynamics\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-info\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eGood to know:\u003c\/strong\u003e \u003cstrong\u003ePLA\u003c\/strong\u003e (polylactic acid) is a plant-based plastic widely used in 3D printing. Its \"metallic\" version contains pigments that imitate the look of metal, but the model is not made of solid metal: it is therefore lightweight and must be handled with care. The fine lines visible on the surface are the normal signature of layer-by-layer printing.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-tip\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eTip:\u003c\/strong\u003e Take your time during assembly and work in daylight on a clear table. For an optimal presentation, position the model at a three-quarter angle, with the cutaway side facing you: the fan and internal stages will be visible at a single glance. Remove the batteries if the model will not be spun for a long time.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eTechnical characteristics\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-sp\"\u003e\n\n\u003ctable\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eType\u003c\/td\u003e\n\n\u003ctd\u003eHigh-bypass jet engine model, cutaway view\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eVersion\u003c\/td\u003e\n\n\u003ctd\u003eAssembly kit\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eManufacturing\u003c\/td\u003e\n\n\u003ctd\u003e3D printing\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\n\u003ctd\u003eMetallic-surface PLA\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eFinish\u003c\/td\u003e\n\n\u003ctd\u003eCopper and metallic silver blades and casings, silver cone\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eBase\u003c\/td\u003e\n\n\u003ctd\u003eBlack\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eApproximate dimensions\u003c\/td\u003e\n\n\u003ctd\u003eApprox. 28 × 15 × 10 cm (based on photo)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eAnimation\u003c\/td\u003e\n\n\u003ctd\u003eBlade rotation via battery-operated electric motor\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eBattery type and quantity\u003c\/td\u003e\n\n\u003ctd\u003eNot disclosed\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eBatteries included\u003c\/td\u003e\n\n\u003ctd\u003eNot disclosed\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003ePackaging\u003c\/td\u003e\n\n\u003ctd\u003eBlack box with foam padding\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eNumber of parts \/ manual\u003c\/td\u003e\n\n\u003ctd\u003eNot disclosed\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-warn\"\u003e\n\n\u003cp\u003e\u003cstrong\u003ePrecautions:\u003c\/strong\u003e This is a collector's model, not a toy. It contains small parts and batteries: keep out of reach of children under 3 years old. PLA deforms in heat: do not expose the model to direct sunlight behind glass, near a radiator, or in a car. Do not put fingers into the rotating blades and never force the thin parts during assembly.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-gift\"\u003e\n\n\u003ch3\u003eThe ideal gift for an aviation enthusiast\u003c\/h3\u003e\n\n\u003cp\u003ePrivate pilot, aeronautical engineer, mechanic, engineering student, airshow lover, or simply a traveler fascinated by airplanes: this model is a gift that is built and has a story to tell. It marks a retirement, a graduation, a first flight, or a birthday, and also makes a very beautiful corporate gift for the aeronautics sector.\u003c\/p\u003e\n\n\u003cp\u003eTo complete the gift, discover other items from the \u003ca href=\"\/collections\/objets-scientifiques\"\u003eAtypical Workshop Lab\u003c\/a\u003e or our \u003ca href=\"\/collections\/bureau-et-hi-tech\"\u003eOffice \u0026amp; High-Tech\u003c\/a\u003e selection, for a truly realistic engineer's desk.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eFrequently asked questions\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-faq\"\u003e\n\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eDoes the model come assembled?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eNo, this is an \u003cstrong\u003eassembly kit\u003c\/strong\u003e. The 3D printed parts are delivered in a \u003cstrong\u003eblack box\u003c\/strong\u003e, secured in foam that protects them during transport. Assembly is part of the pleasure: by mounting the base and then the different engine stages, you concretely understand how the fan, compressor, and turbine articulate. The exact number of parts and the presence of a detailed manual are not disclosed by the manufacturer. We recommend proceeding \u003cstrong\u003ecalmly\u003c\/strong\u003e on a well-lit table and never forcing the blades, which are the model's thinnest elements.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eDo the blades really spin?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eYes. The model incorporates a \u003cstrong\u003esmall battery-operated electric motor\u003c\/strong\u003e that spins the blades, allowing for a vivid demonstration of how a jet engine works. This is, of course, an \u003cstrong\u003eanimation\u003c\/strong\u003e: the model produces neither thrust nor combustion; it only reproduces the rotational movement to help visualize the air's path. The \u003cstrong\u003ebattery type and quantity\u003c\/strong\u003e are not specified by the manufacturer, and their inclusion in the box is not confirmed: check the battery compartment during assembly to choose the right format. Remember to remove the batteries if not in use for an extended period.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhat are the model's dimensions?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eAccording to the measurements visible in the manufacturer's photos, the assembled model measures about \u003cstrong\u003e11 × 6 × 4 inches\u003c\/strong\u003e, or approximately \u003cstrong\u003e28 × 15 × 10 cm\u003c\/strong\u003e with its base. This is an ideal format for a \u003cstrong\u003edesk\u003c\/strong\u003e, a bookshelf, or a collector's display case: large enough for the details of the blades and stages to be easily legible, but compact enough not to clutter a workspace. The weight is not disclosed; as the model is made of PLA, it remains lightweight. Plan for a stable location, protected from direct sunlight and heat sources.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhat material is it made of?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eThe model is \u003cstrong\u003e3D printed\u003c\/strong\u003e in \u003cstrong\u003ePLA\u003c\/strong\u003e, a plant-based plastic (polylactic acid) widely used in additive manufacturing. The version used here has a \u003cstrong\u003emetallic surface\u003c\/strong\u003e: pigments give the blades and casings \u003cstrong\u003ecopper and silver\u003c\/strong\u003e highlights that evoke the metal of a real engine. It is therefore not solid metal, which makes the object lightweight and pleasant to handle, but more sensitive to heat and impact. Fine lines may be visible on the surface: these are the normal signature of layer-by-layer printing, not a defect.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhat exactly does the model represent?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eIt represents a \u003cstrong\u003ehigh-bypass turbofan\u003c\/strong\u003e jet engine, the type of engine that powers most airliners. The \u003cstrong\u003ecutaway view\u003c\/strong\u003e reveals the interior: the large \u003cstrong\u003efan\u003c\/strong\u003e at the front, the compressor stages, the combustion zone, and the turbine, all the way to the rear exhaust nozzle. It allows you to understand the two paths of air—the core flow that passes through the heart of the engine and the bypass flow that goes around it. It is a \u003cstrong\u003egeneric and educational\u003c\/strong\u003e representation that does not reproduce a specific engine model or brand.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eIs the assembly difficult?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eAssembly primarily requires \u003cstrong\u003epatience and delicacy\u003c\/strong\u003e, more than technical know-how. The parts are pre-printed and arranged in the box's foam; the main challenge is to respect the order of the stages and not to force thin elements like the blades. The manufacturer does not disclose assembly time or difficulty level. We recommend this kit for \u003cstrong\u003eadults and teenagers\u003c\/strong\u003e accustomed to models or curious about mechanics. Work on a clear table with good lighting, and keep small parts in a bowl so as not to lose anything during assembly.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eHow do I maintain the model once assembled?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003e\n\n\u003cp\u003eOnce assembled, the model requires little maintenance. Dust it regularly with a \u003cstrong\u003esoft brush\u003c\/strong\u003e or a \u003cstrong\u003eblower\u003c\/strong\u003e, especially between the blades where dust tends to accumulate. Avoid water and household cleaners, which could dull the metallic finish. Above all, keep it away from \u003cstrong\u003eheat\u003c\/strong\u003e: PLA can deform in direct sunlight behind glass, near a radiator, or in a car during the summer. If you do not spin the blades for several weeks, remove the batteries to avoid any risk of leakage in the compartment.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003c\/details\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Atelier Atypique","offers":[{"title":"Default Title","offer_id":54860801540419,"sku":"1005012831820155-Poland","price":94.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0231\/3365\/0991\/files\/Sd78e02b515904b6d86f66b3e24c065224.webp?v=1791060813"},{"product_id":"hand-boiler-en-verre-liquide-bleu-qui-bout-dans-la-main-caloris","title":"Glass Franklin's boiling point, blue liquid that boils in your hand — HEAT","description":"\u003cstyle\u003e\n.aa{font-family:Georgia,'Times New Roman',serif;color:#1A1A1A;line-height:1.7;font-size:15px;max-width:760px;margin:0 auto}\n.aa p{margin:0 0 1rem}\n.aa a{color:#185FA5;text-decoration:underline}\n.aa 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.aa-gift{background:linear-gradient(135deg,#FFFDF7,#FFF9E8);border:1px solid #FAC775;border-radius:10px;padding:1.3rem 1.5rem;margin:1.5rem 0}\n.aa .aa-gift h3{color:#5C3A1E;font-size:16px;margin:0 0 .6rem}\n.aa .aa-gift p{font-size:14px}\n.aa .aa-faq{margin:1rem 0 1.5rem}\n.aa details.aa-q{border-bottom:1px solid #ebe5d6;padding:.85rem 0}\n.aa details.aa-q summary{font-size:14px;font-weight:700;list-style:none;padding-right:20px;position:relative;cursor:pointer}\n.aa details.aa-q summary::-webkit-details-marker{display:none}\n.aa details.aa-q summary::after{content:\"+\";position:absolute;right:0;top:0;color:#FAC775;font-size:18px;line-height:1}\n.aa details.aa-q[open] summary::after{content:\"\\2212\"}\n.aa .aa-a{font-size:13px;color:#3a3a3a;margin-top:.5rem}\n.aa .aa-a p{margin:0 0 .5rem}\n@media(max-width:600px){.aa .aa-vars,.aa .aa-ben{grid-template-columns:1fr}}\n.aa-links{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:1rem 0}\n.aa-links a.aa-link{display:block;background:#fff;border:1px solid #ebe5d6;border-left:3px solid #FAC775;border-radius:6px;padding:.8rem 1rem;text-decoration:none;color:#1A1A1A}\n.aa-link .lt{display:block;font-weight:700;font-size:14px}.aa-link .ld{display:block;font-size:12px;color:#555}\n@media(max-width:600px){.aa-links{grid-template-columns:1fr}}\n\u003c\/style\u003e\n\u003cdiv class=\"aa\"\u003e\n\n\u003cp\u003e\u003cspan class=\"aa-badge aa-badge-bleu\"\u003ePhysics experiment\u003c\/span\u003e \u003cspan class=\"aa-badge aa-badge-noir\"\u003eGlass\u003c\/span\u003e Simply take it in your palm for the magic to happen. The \u003cstrong\u003eCALORIS hand boiler\u003c\/strong\u003e, also known as a \u003cstrong\u003eFranklin boiler\u003c\/strong\u003e or \u003cstrong\u003elove thermometer\u003c\/strong\u003e, is a \u003cstrong\u003eglass scientific object\u003c\/strong\u003e 16.5 cm tall that turns the heat from your fingers into a spectacle. Two transparent bulbs, a small one at the top and a larger one at the bottom, are connected by a \u003cstrong\u003edouble-loop tube\u003c\/strong\u003e in which a \u003cstrong\u003eblue liquid\u003c\/strong\u003e circulates. Place your hand on the bottom bulb: the liquid climbs the loop, reaches the top bulb, and starts to bubble, looking as if it is boiling, even though it remains barely lukewarm. Then hold the top bulb and the movement reverses. Behind the effect lies a real lesson in \u003cstrong\u003evapor pressure physics\u003c\/strong\u003e, visible to the naked eye and without any batteries. Fragile and delicate, this \u003cstrong\u003escientific gift\u003c\/strong\u003e, recommended for ages 14 and up, will find its place on a desk, a shelf, or in the cabinet of a curiosity collector.\u003c\/p\u003e\n\n\u003ch3 class=\"aa-title\"\u003eWhy it is so intriguing\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-ben\"\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eWorks with your hand\u003c\/span\u003e\u003cspan class=\"ds\"\u003eNo batteries, no power cords: the simple heat of your palm is enough to set the liquid in motion.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eA fake boil\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe liquid appears to boil in the top bulb while remaining at the temperature of your fingers.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eDouble glass loop\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe tube creates two loops between the bulbs: the path of the blue liquid becomes a little spectacle to follow with your eyes.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e★\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eReversible at will\u003c\/span\u003e\u003cspan class=\"ds\"\u003eChange your grip, hold the top bulb, and the liquid moves in the other direction.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e❄\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eA physics lesson\u003c\/span\u003e\u003cspan class=\"ds\"\u003eVapor pressure, heat transfer, equilibrium: perfect for illustrating a lesson or sparking a discussion.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e❖\u003c\/span\u003e\n\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eDesktop size\u003c\/span\u003e\u003cspan class=\"ds\"\u003e16.5 cm tall and 5 cm wide: it fits in the hand and slips easily onto a shelf.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eGlass, the material of the experiment\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-mat\"\u003e\n\n\u003ch3\u003eGlass: seeing physics through matter\u003c\/h3\u003e\n\n\u003cp\u003eIf glass is the preferred material for demonstration instruments, it is first and foremost for its \u003cstrong\u003etransparency\u003c\/strong\u003e: it allows you to see every stage of the phenomenon, the rise of the liquid in the tube, its passage through the loops, and finally the arrival of the bubbles in the upper bulb. Nothing is hidden, everything is clear.\u003c\/p\u003e\n\n\u003cp\u003eGlass is also an \u003cstrong\u003eimpermeable and inert\u003c\/strong\u003e material: it keeps the liquid locked in a closed circuit and does not react with it. On the other hand, it remains \u003cstrong\u003efragile\u003c\/strong\u003e. The walls of the bulbs and the double-loop tube should be handled gently, preferably over a soft surface, and stored away from impacts and falls.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eHow the hand boiler works\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-des\"\u003e\n\n\u003cp class=\"t\"\u003eThe heat that moves the liquid\u003c\/p\u003e\n\n\u003cdiv class=\"x\"\u003e\n\n\u003cp\u003eInside the glass, CALORIS contains a \u003cstrong\u003evolatile liquid colored blue\u003c\/strong\u003e. Volatile means that it easily changes from a liquid to a vapor state, even at room temperature. Above the liquid, the empty space is filled with its own vapor, the pressure of which depends directly on the temperature.\u003c\/p\u003e\n\n\u003cp\u003eWhen you close your hand around the bottom bulb, you warm it slightly. The \u003cstrong\u003evapor pressure\u003c\/strong\u003e increases on that side and pushes the liquid upward, through the double-loop tube, to the top bulb. Once the liquid has left the bottom bulb, the vapor itself rushes into the tube and rises in \u003cstrong\u003ebubbles\u003c\/strong\u003e through the liquid: it is this bubbling that creates the illusion of boiling.\u003c\/p\u003e\n\n\u003cp\u003eThe liquid does not heat up like in a pot. It does not boil in the usual sense: it simply moves from the warmer zone to the cooler one. Hold the top bulb, and the \u003cstrong\u003etemperature difference\u003c\/strong\u003e is reversed, as is the path of the liquid.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-steps\"\u003e\n\n\u003ch4\u003eMaking CALORIS boil in four steps\u003c\/h4\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e1\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eHold it:\u003c\/strong\u003e gently grasp the hand boiler and close your palm over the large bottom bulb without squeezing the glass.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e2\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eWait:\u003c\/strong\u003e keep your hand still for a few moments, long enough for the heat of your fingers to affect the bulb and the blue liquid.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e3\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eObserve:\u003c\/strong\u003e the liquid rises into the double-loop tube, reaches the small top bulb, and begins to bubble.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e4\u003c\/span\u003e\n\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eReverse:\u003c\/strong\u003e let go of the bottom bulb and hold the top one: the liquid slowly returns to the large bulb.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eWhat happens according to your grip\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-cmp\"\u003e\n\n\u003ctable\u003e\n\n\u003cthead\u003e\n\n\u003ctr\u003e\n\n\u003cth\u003eSituation\u003c\/th\u003e\n\n\u003cth\u003eWhat you observe\u003c\/th\u003e\n\n\u003cth\u003eWhy\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/thead\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eHand on bottom bulb\u003c\/td\u003e\n\n\u003ctd\u003eLiquid rises into the loop and bubbles at the top\u003c\/td\u003e\n\n\u003ctd\u003eThe vapor, heated at the bottom, pushes the liquid toward the cooler bulb\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eHand on top bulb\u003c\/td\u003e\n\n\u003ctd\u003eThe liquid moves back down to the large bulb\u003c\/td\u003e\n\n\u003ctd\u003eThe hot zone moves to the top: the pressure direction changes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eObject left at rest\u003c\/td\u003e\n\n\u003ctd\u003eThe liquid gradually gathers at the bottom\u003c\/td\u003e\n\n\u003ctd\u003eWithout a temperature difference, gravity takes over\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eCold hands\u003c\/td\u003e\n\n\u003ctd\u003eSlower, or even subtle reaction\u003c\/td\u003e\n\n\u003ctd\u003eThe temperature difference between the hand and the glass is lower\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-info\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eGood to know:\u003c\/strong\u003e the hand boiler does not measure temperature and does not tell you anything about your feelings, despite its nickname, the \"love thermometer.\" It reacts to the \u003cstrong\u003etemperature difference\u003c\/strong\u003e between your hand and the glass: the warmer the hand is compared to the room, the faster and more spectacular the phenomenon.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-tip\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eTip for a successful demonstration:\u003c\/strong\u003e rub your hands together for a few seconds before holding the bottom bulb, or blow gently on your palms. In a cool room, the effect is often clearer. For a group demonstration, pass the object from hand to hand: everyone gets a slightly different result, which inevitably sparks conversation.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eSpecifications\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-sp\"\u003e\n\n\u003ctable\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eType\u003c\/td\u003e\n\n\u003ctd\u003eHand boiler\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\n\u003ctd\u003eGlass\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eHeight\u003c\/td\u003e\n\n\u003ctd\u003e16.5 cm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eWidth\u003c\/td\u003e\n\n\u003ctd\u003e5 cm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eNumber of bulbs\u003c\/td\u003e\n\n\u003ctd\u003e2 (a small one at the top, a large one at the bottom)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eConnecting tube\u003c\/td\u003e\n\n\u003ctd\u003e2 loops\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eContents\u003c\/td\u003e\n\n\u003ctd\u003eBlue-colored volatile liquid, closed circuit\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eOperation\u003c\/td\u003e\n\n\u003ctd\u003eHeat of the hand, no batteries or power needed\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eRecommended age\u003c\/td\u003e\n\n\u003ctd\u003e14 years and older\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eColors\u003c\/td\u003e\n\n\u003ctd\u003eTransparent glass, blue liquid\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eUse\u003c\/td\u003e\n\n\u003ctd\u003eScientific demonstration and decorative object\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-warn\"\u003e\n\n\u003cp\u003e\u003cstrong\u003eFragile glass object:\u003c\/strong\u003e handle CALORIS with care, without squeezing or shaking it, and place it away from impacts and falls. Never heat it with anything other than your hand (flame, radiator, hot water, direct sunlight) and do not try to open it. In case of breakage, collect the pieces carefully and avoid any skin, eye, or mouth contact with the liquid. Recommended for ages \u003cstrong\u003e14 and up\u003c\/strong\u003e; keep out of reach of young children.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eA scientific gift that gets a reaction\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-gift\"\u003e\n\n\u003ch3\u003eFor the curious of all ages\u003c\/h3\u003e\n\n\u003cp\u003eChristmas, birthdays, a small gift for a colleague passionate about science or a physics teacher: CALORIS is one of those gifts that you try out as soon as you open it and that everyone wants to hold in turn. It appeals just as much to curious teenagers, from age 14, as it does to adults who love desk objects with a story to tell.\u003c\/p\u003e\n\n\u003cp\u003eTo extend the exploration of heat and motion, pair it with the \u003ca href=\"\/products\/moteur-stirling-bicylindre-avec-generateur-et-led-castor\"\u003eCASTOR Stirling engine\u003c\/a\u003e, which also transforms temperature differences into movement, or the \u003ca href=\"\/products\/barometre-a-cristaux-globe-en-verre-storm-glass-aurore\"\u003eAURORE crystal barometer\u003c\/a\u003e. Shipping is free.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-links\"\u003e\n\n\u003ca class=\"aa-link\" href=\"\/collections\/physique-et-mouvement\"\u003e\u003cspan class=\"lt\"\u003ePhysics and motion\u003c\/span\u003e\u003cspan class=\"ld\"\u003eKinetic objects and physics experiments for your desk\u003c\/span\u003e\u003c\/a\u003e \u003ca class=\"aa-link\" href=\"\/products\/moteur-stirling-bicylindre-avec-generateur-et-led-castor\"\u003e\u003cspan class=\"lt\"\u003eCASTOR Stirling engine\u003c\/span\u003e\u003cspan class=\"ld\"\u003eHeat transformed into motion, mechanical version\u003c\/span\u003e\u003c\/a\u003e \u003ca class=\"aa-link\" href=\"\/products\/sablier-a-bulles-en-verre-liquide-colore-8-20-cm-nimbus\"\u003e\u003cspan class=\"lt\"\u003eNIMBUS bubble hourglass\u003c\/span\u003e\u003cspan class=\"ld\"\u003eAnother colorful liquid spectacle under glass\u003c\/span\u003e\u003c\/a\u003e \u003ca class=\"aa-link\" href=\"\/collections\/objets-scientifiques\"\u003e\u003cspan class=\"lt\"\u003eScientific objects\u003c\/span\u003e\u003cspan class=\"ld\"\u003eAll the Lab's curiosities to gift science\u003c\/span\u003e\u003c\/a\u003e\n\n\u003c\/div\u003e\n\n\u003ch3 class=\"aa-title\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-faq\"\u003e\n\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eHow does a hand boiler work?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003eThe hand boiler contains a \u003cstrong\u003ecolored volatile liquid\u003c\/strong\u003e, meaning a liquid that easily turns into vapor. This vapor occupies the empty space above the liquid, and its pressure increases with temperature. When you hold the bottom bulb, you warm it up: the \u003cstrong\u003evapor pressure\u003c\/strong\u003e becomes higher there than in the top bulb, pushing the liquid through the double-loop tube. Once the bottom bulb is empty, the vapor rises in turn and passes through the liquid in the form of bubbles. It is this passage of vapor that creates the impression of boiling, without any heat source other than your hand.\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eDoes the liquid actually boil?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003eNot in the way you boil water. The liquid in CALORIS \u003cstrong\u003edoes not become boiling hot\u003c\/strong\u003e: it remains at a temperature close to that of your hand. The bubbles visible in the top bulb are \u003cstrong\u003evapor pushed from the bottom bulb\u003c\/strong\u003e, which rises through the liquid. The result looks exactly like boiling, hence the name hand boiler, but it is actually a displacement caused by a pressure difference. It is precisely this contrast between what we see and what is really happening that makes it an excellent scientific demonstration object.\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhy is it called a love thermometer?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003eThis nickname is based on a fun idea: the more \"in love\" or \"warm\" a person is, the faster the liquid rises. In reality, the hand boiler measures neither feelings nor a precise temperature. It only reacts to the \u003cstrong\u003etemperature difference\u003c\/strong\u003e between the hand and the glass. Warm hands in a cool room will produce a faster effect, while cold hands will produce a slower one. It remains a fun game among friends or family, provided you remember that it is \u003cstrong\u003ephysics\u003c\/strong\u003e, not the heart, that makes the blue liquid rise.\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhat should I do if the liquid doesn't rise?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003eMost often, it is because the temperature difference between the hand and the glass is too small. Start by \u003cstrong\u003ewarming your hands\u003c\/strong\u003e by rubbing them together, then close your palm over the entire surface of the large bottom bulb and remain still for a few moments. Also, check that the liquid is in the bottom bulb before starting: if it is already at the top, first hold the upper bulb to make it descend. Finally, the effect is clearer in a \u003cstrong\u003ecool room\u003c\/strong\u003e than in a very warm one. Avoid any other heat source than your hand.\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eWhat are the dimensions of CALORIS?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003eCALORIS measures \u003cstrong\u003e16.5 cm tall\u003c\/strong\u003e and \u003cstrong\u003e5 cm wide\u003c\/strong\u003e. This size fits comfortably in the hand, which is essential since your palm triggers the phenomenon. It consists of two glass bulbs, a small one at the top and a larger one at the bottom, connected by a tube that forms two loops. Its size allows you to keep it on a desk, a shelf, or in a cabinet next to other scientific objects. Since it is made of glass, choose a stable location away from impacts, high-traffic areas, and direct sunlight.\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eAt what age can it be gifted?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003eCALORIS is recommended \u003cstrong\u003efor ages 14 and up\u003c\/strong\u003e. It is not a toy: it is a \u003cstrong\u003efragile glass object\u003c\/strong\u003e containing a liquid that should not be handled. It is therefore suitable for curious teenagers and adults capable of handling it with delicacy. For a demonstration in front of younger children, it is best for an adult to hold the object while the children observe. This format makes it a great tool to spark interest in science: one can explain vapor pressure, heat, and phase changes using an experiment that everyone can see with their own eyes.\u003c\/div\u003e\n\n\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\n\u003csummary\u003eHow do I maintain and store the hand boiler?\u003c\/summary\u003e\n\u003cdiv class=\"aa-a\"\u003eMaintenance is minimal. Wipe the glass with a \u003cstrong\u003esoft, dry cloth\u003c\/strong\u003e to remove fingerprints. Do not use abrasive products or hot water, and never submerge the object in water. The circuit is closed: you should \u003cstrong\u003enever attempt to open or refill it\u003c\/strong\u003e. Store it on a soft and stable surface, away from heat sources and direct sunlight, and out of reach of young children. For transport, wrap it in thick fabric: the bulbs and the double-loop tube are the parts most sensitive to impact.\u003c\/div\u003e\n\n\u003c\/details\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e","brand":"Atelier Atypique","offers":[{"title":"Default Title","offer_id":54905645531459,"sku":"AA-CALORIS","price":29.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0231\/3365\/0991\/files\/S719b6beca02d4683b3a3b4e0f1cfce8ak.png?v=1791973062"},{"product_id":"kit-tornade-a-monter-simulateur-de-tourbillon-motorise-tornade","title":"DIY tornado kit, motorized whirlpool simulator — TORNADO","description":"\u003cstyle\u003e\n.aa{font-family:Georgia,'Times New Roman',serif;color:#1A1A1A;line-height:1.7;font-size:15px;max-width:760px;margin:0 auto}\n.aa p{margin:0 0 1rem}\n.aa a{color:#185FA5;text-decoration:underline}\n.aa .aa-title{display:inline-block;border-bottom:2px solid #FAC775;padding-bottom:4px;font-size:16px;font-weight:600;margin:1.75rem 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0 1.5rem}\n.aa details.aa-q{border-bottom:1px solid #ebe5d6;padding:.85rem 0}\n.aa details.aa-q summary{font-size:14px;font-weight:700;list-style:none;padding-right:20px;position:relative;cursor:pointer}\n.aa details.aa-q summary::-webkit-details-marker{display:none}\n.aa details.aa-q summary::after{content:\"+\";position:absolute;right:0;top:0;color:#FAC775;font-size:18px;line-height:1}\n.aa details.aa-q[open] summary::after{content:\"\\2212\"}\n.aa .aa-a{font-size:13px;color:#3a3a3a;margin-top:.5rem}\n.aa .aa-a p{margin:0 0 .5rem}\n@media(max-width:600px){.aa .aa-vars,.aa .aa-ben{grid-template-columns:1fr}}\n.aa-links{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:1rem 0}\n.aa-links a.aa-link{display:block;background:#fff;border:1px solid #ebe5d6;border-left:3px solid #FAC775;border-radius:6px;padding:.8rem 1rem;text-decoration:none;color:#1A1A1A}\n.aa-link .lt{display:block;font-weight:700;font-size:14px}.aa-link .ld{display:block;font-size:12px;color:#555}\n@media(max-width:600px){.aa-links{grid-template-columns:1fr}}\n\u003c\/style\u003e\n\u003cdiv class=\"aa\"\u003e\n\n\n\u003cp\u003e\u003cspan class=\"aa-badge aa-badge-noir\"\u003eAssembly kit\u003c\/span\u003e \u003cspan class=\"aa-badge aa-badge-bleu\"\u003eAges 8+\u003c\/span\u003e How is a tornado born? Rather than explaining it on a chalkboard, the \u003cstrong\u003eTORNADO kit\u003c\/strong\u003e makes one appear right on your living room table. This \u003cstrong\u003emotorized vortex simulator\u003c\/strong\u003e is self-assembled: a \u003cstrong\u003egray conical base\u003c\/strong\u003e houses a small motor powered by two AA batteries, which sets the water in a transparent bottle placed on top into rotation. In a few moments, a \u003cstrong\u003evortex\u003c\/strong\u003e forms in the center, like an air funnel plunging into the liquid. Add a few \u003cstrong\u003eglitter flakes\u003c\/strong\u003e or a drop of \u003cstrong\u003efood coloring\u003c\/strong\u003e and the whirlpool becomes spectacular. The kit includes the base, the motor with its wires, the propeller and parts to assemble, a screwdriver, and an \u003cstrong\u003eillustrated instruction manual\u003c\/strong\u003e. Two versions are available: \u003cstrong\u003eWithout bottle\u003c\/strong\u003e, to use your own 50 cl plastic mineral water bottle, or \u003cstrong\u003eWith bottle\u003c\/strong\u003e, supplied with its own 19 cm transparent bottle. A \u003cstrong\u003escientific experiment to do at home\u003c\/strong\u003e, to be shared with the family from age 8, combining DIY, mechanics, and fluid physics.\u003c\/p\u003e\n\n\n\u003cdiv class=\"aa-vars\"\u003e\n\n  \u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v dark\" style=\"background:#3A3A3A\"\u003eWITHOUT BOTTLE\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eWithout bottle\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003eThe complete kit, to be used with your own 50 cl plastic mineral water bottle\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n  \u003cdiv class=\"aa-var\"\u003e\n\n\u003cdiv class=\"aa-var-v light\" style=\"background:#F5F0E8\"\u003eWITH BOTTLE\u003c\/div\u003e\n\n\u003cdiv class=\"aa-var-i\"\u003e\n\n\u003cspan class=\"aa-var-n\"\u003eWith bottle\u003c\/span\u003e\u003cspan class=\"aa-var-d\"\u003eThe complete kit and its transparent bottle, 6.2 cm in diameter and 19 cm high\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003ch3 class=\"aa-title\"\u003eHighlights of the tornado kit\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-ben\"\u003e\n\n  \u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e✦\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eA real motorized whirlpool\u003c\/span\u003e\u003cspan class=\"ds\"\u003eThe motor housed in the base puts the water into rotation: the vortex forms and is maintained as long as it spins.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n  \u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e◆\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eAssembled by your own hands\u003c\/span\u003e\u003cspan class=\"ds\"\u003eBase, motor, propeller, and parts assemble using the included screwdriver by following the illustrated instructions.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n  \u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e➤\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003ePhysics made visible\u003c\/span\u003e\u003cspan class=\"ds\"\u003eRotation, air funnel, particle movement: a weather phenomenon to observe up close.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n  \u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e★\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eGlitter and colors\u003c\/span\u003e\u003cspan class=\"ds\"\u003eA pinch of glitter or a drop of food coloring is enough to reveal the spiral of the current.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n  \u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e❖\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eTwo versions to choose from\u003c\/span\u003e\u003cspan class=\"ds\"\u003eWith the provided bottle, or without, to recycle a 50 cl mineral water bottle.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n  \u003cdiv class=\"aa-b\"\u003e\n\n\u003cspan class=\"ic\"\u003e●\u003c\/span\u003e\u003cdiv\u003e\n\n\u003cspan class=\"tt\"\u003eCompact and CE-marked\u003c\/span\u003e\u003cspan class=\"ds\"\u003eA 11 cm diameter base, a 21.5 × 17 × 7 cm box, an educational toy for ages 8 and up.\u003c\/span\u003e\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003ch3 class=\"aa-title\"\u003eHow a vortex is born\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-mat\"\u003e\n\n\u003ch3\u003eThe tornado in a bottle: a lesson in fluid physics\u003c\/h3\u003e\n\n\u003cp\u003eA \u003cstrong\u003evortex\u003c\/strong\u003e is a rotary movement of a fluid around an axis. When water spins, it is pushed toward the walls of the bottle: the surface dips in the center and forms a \u003cstrong\u003efunnel\u003c\/strong\u003e, which becomes deeper as the rotation is sustained. It is the same principle that governs the whirlpool in a draining bathtub, the eddies in a river, or, on a completely different scale, the rotating air columns of \u003cstrong\u003etornadoes\u003c\/strong\u003e and waterspouts.\u003c\/p\u003e\n\n\u003cp\u003eThe kit allows these phenomena to be observed without risk and at eye level. The glitter, carried by the current, materializes the lines of movement: it rises, descends, and spirals around the axis. An excellent gateway to the concepts of \u003cstrong\u003ecentrifugal force\u003c\/strong\u003e, pressure, and meteorology, perfect for a \u003cstrong\u003ephysics experiment\u003c\/strong\u003e at home or in the classroom.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003ch3 class=\"aa-title\"\u003eA whirlpool on the table\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-des\"\u003e\n\n\u003cp class=\"t\"\u003eStormy skies, in pocket version\u003c\/p\u003e\n\n\u003cdiv class=\"x\"\u003e\n\n\u003cp\u003eTornadoes are as fascinating as they are impressive. We watch them on television, read stories about storm chasers, but we rarely see them up close. TORNADE reverses the scene: the phenomenon fits inside a \u003cstrong\u003ewater bottle\u003c\/strong\u003e, placed on a gray base with a conical design.\u003c\/p\u003e\n\n\u003cp\u003eThe most joyful moment comes when it is turned on. The water begins to spin, the surface dips, and then an \u003cstrong\u003eair funnel\u003c\/strong\u003e plunges toward the bottom. The glitter rises in a spiral and outlines the shape of the whirlpool. Children ask questions, adults look for answers: it is exactly what one expects from a \u003cstrong\u003escientific object\u003c\/strong\u003e.\u003c\/p\u003e\n\n\u003cp\u003eAnd because the kit is self-assembled, the satisfaction is twofold: you first understand how the machine works, then you observe what it produces.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003ch3 class=\"aa-title\"\u003eAssembly and startup\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-steps\"\u003e\n\n\u003ch4\u003eYour tornado in four steps\u003c\/h4\u003e\n\n  \u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e1\u003c\/span\u003e\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eAssemble:\u003c\/strong\u003e follow the illustrated instructions to install the motor, its wires, and the propeller in the conical base, screwing the parts together with the included screwdriver.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n  \u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e2\u003c\/span\u003e\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003ePower:\u003c\/strong\u003e insert two 1.5 V AA batteries (not included) into the base compartment, observing the indicated polarity.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n  \u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e3\u003c\/span\u003e\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003ePrepare the bottle:\u003c\/strong\u003e fill the provided bottle or your own 50 cl bottle with water, add glitter or food coloring, close, and install it.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n  \u003cdiv class=\"aa-step\"\u003e\n\n\u003cspan class=\"aa-step-n\"\u003e4\u003c\/span\u003e\u003cdiv class=\"aa-step-c\"\u003e\n\n\u003cstrong\u003eObserve:\u003c\/strong\u003e turn the motor on: the water spins, the vortex deepens, and the glitter draws the spiral of your tornado.\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003c\/div\u003e\n\n\n\u003ch3 class=\"aa-title\"\u003eWithout or with bottle\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-cmp\"\u003e\u003ctable\u003e\n\n\u003cthead\u003e\u003ctr\u003e\n\n\u003cth\u003eCriteria\u003c\/th\u003e\n\n\u003cth\u003eWithout bottle\u003c\/th\u003e\n\n\u003cth\u003eWith bottle\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\u003c\/thead\u003e\n\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eMotor base and parts\u003c\/td\u003e\n\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eScrewdriver and manual\u003c\/td\u003e\n\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eBottle\u003c\/td\u003e\n\n\u003ctd\u003eTo be provided: 50 cl plastic mineral water bottle\u003c\/td\u003e\n\n\u003ctd\u003eTransparent bottle provided, Ø 6.2 cm × 19 cm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr class=\"hl\"\u003e\n\n\u003ctd\u003eBatteries\u003c\/td\u003e\n\n\u003ctd\u003e2 x 1.5 V AA batteries not included\u003c\/td\u003e\n\n\u003ctd\u003e2 x 1.5 V AA batteries not included\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eIdeal for\u003c\/td\u003e\n\n\u003ctd\u003eRecycling an everyday bottle\u003c\/td\u003e\n\n\u003ctd\u003eStarting the experiment immediately\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/tbody\u003e\n\n\n\u003c\/table\u003e\u003c\/div\u003e\n\n\n\u003ch3 class=\"aa-title\"\u003eGood to know\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-info\"\u003e\u003cp\u003e\u003cstrong\u003eKit contents:\u003c\/strong\u003e conical motor base with battery compartment, small motor and wires, propeller and parts to assemble, screwdriver, and illustrated manual; the With bottle version adds a \u003cstrong\u003etransparent bottle\u003c\/strong\u003e. The \u003cstrong\u003etwo 1.5 V AA batteries are not included\u003c\/strong\u003e, nor are the glitter and food coloring seen in the promotional photos.\u003c\/p\u003e\u003c\/div\u003e\n\n\n\u003cdiv class=\"aa-tip\"\u003e\u003cp\u003e\u003cstrong\u003eObservation tip:\u003c\/strong\u003e \u003cstrong\u003efine, light glitter\u003c\/strong\u003e follows the current better than large confetti. A single drop of food coloring is enough: if too concentrated, the water obscures the funnel. Place the bottle in front of a window or lamp to make the glitter shine and better see the shape of the vortex.\u003c\/p\u003e\u003c\/div\u003e\n\n\n\u003cdiv class=\"aa-warn\"\u003e\u003cp\u003e\u003cstrong\u003eSafety:\u003c\/strong\u003e this kit contains \u003cstrong\u003esmall parts\u003c\/strong\u003e and is not suitable for children under 3 years old due to the risk of choking. It is recommended for \u003cstrong\u003eages 8+\u003c\/strong\u003e; adult presence is advised during assembly and handling of batteries. Carefully close the bottle before installing it and keep the base, which contains the motor and batteries, away from water. Remove the batteries if not in use for an extended period.\u003c\/p\u003e\u003c\/div\u003e\n\n\n\u003ch3 class=\"aa-title\"\u003eTechnical specifications\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-sp\"\u003e\u003ctable\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eType\u003c\/td\u003e\n\n\u003ctd\u003eAssembly kit, motorized tornado simulator\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eBase\u003c\/td\u003e\n\n\u003ctd\u003eConical, gray, with motor and battery compartment\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eBase dimensions\u003c\/td\u003e\n\n\u003ctd\u003eØ 11 cm × 7 cm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eBottle (With bottle version)\u003c\/td\u003e\n\n\u003ctd\u003eTransparent, Ø 6.2 cm × 19 cm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eBottle (Without bottle version)\u003c\/td\u003e\n\n\u003ctd\u003e50 cl plastic mineral water bottle, to be provided\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003ePower supply\u003c\/td\u003e\n\n\u003ctd\u003e2 x 1.5 V AA batteries (not included)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eBox dimensions\u003c\/td\u003e\n\n\u003ctd\u003e21.5 × 17 × 7 cm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eIncluded tool\u003c\/td\u003e\n\n\u003ctd\u003eScrewdriver\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eDocumentation\u003c\/td\u003e\n\n\u003ctd\u003eIllustrated assembly manual\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eRecommended age\u003c\/td\u003e\n\n\u003ctd\u003eAges 8+ (not recommended for under 3s: small parts)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\u003ctr\u003e\n\n\u003ctd\u003eCompliance\u003c\/td\u003e\n\n\u003ctd\u003eCE Marking\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n\n\u003c\/table\u003e\u003c\/div\u003e\n\n\n\u003ch3 class=\"aa-title\"\u003eA scientific gift idea\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-gift\"\u003e\n\n\u003ch3\u003eFor curious children and weather enthusiasts\u003c\/h3\u003e\n\n  \u003cp\u003eBirthday, Christmas, or just a desire to build something together on a Sunday: TORNADE is a \u003cstrong\u003escientific gift\u003c\/strong\u003e that is meant to be shared. It occupies the hands during assembly, the mind during observation, and leaves an object to display on a shelf or desk.\u003c\/p\u003e\n\n\u003cp\u003eTo extend the exploration, pair it with the \u003ca href=\"\/products\/barometre-a-cristaux-globe-en-verre-storm-glass-aurore\"\u003eAURORE crystal barometer\u003c\/a\u003e, which reacts to the weather, or the \u003ca href=\"\/products\/demonstrateur-de-force-centripete-rail-a-looping-de-bureau-cyclone\"\u003eCYCLONE centripetal force demonstrator\u003c\/a\u003e, the other side of rotation.\u003c\/p\u003e\n\n\n\u003c\/div\u003e\n\n\u003cdiv class=\"aa-links\"\u003e\n\n\u003ca class=\"aa-link\" href=\"\/collections\/physique-et-mouvement\"\u003e\u003cspan class=\"lt\"\u003ePhysics and motion\u003c\/span\u003e\u003cspan class=\"ld\"\u003ePendulums, gyroscopes, and demonstrators to see the laws of motion\u003c\/span\u003e\u003c\/a\u003e\n\u003ca class=\"aa-link\" href=\"\/collections\/temps-et-meteo\"\u003e\u003cspan class=\"lt\"\u003eWeather and meteorology\u003c\/span\u003e\u003cspan class=\"ld\"\u003eBarometers, hourglasses, and objects that tell the weather\u003c\/span\u003e\u003c\/a\u003e\n\u003ca class=\"aa-link\" href=\"\/products\/ferrofluide-magnetique-en-bouteille-decouvrez-la-science\"\u003e\u003cspan class=\"lt\"\u003eFerrofluid in a bottle\u003c\/span\u003e\u003cspan class=\"ld\"\u003eA magnetic liquid that takes shape under a magnet\u003c\/span\u003e\u003c\/a\u003e\n\u003ca class=\"aa-link\" href=\"\/collections\/idees-cadeaux-anniversaire\"\u003e\u003cspan class=\"lt\"\u003eBirthday gift ideas\u003c\/span\u003e\u003cspan class=\"ld\"\u003eOur selection of unique gifts to give\u003c\/span\u003e\u003c\/a\u003e\n\n\u003c\/div\u003e\n\n\n\u003ch3 class=\"aa-title\"\u003eFrequently asked questions\u003c\/h3\u003e\n\n\u003cdiv class=\"aa-faq\"\u003e\n\n\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eHow does the tornado-in-a-bottle kit work?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eThe kit consists of a \u003cstrong\u003econical base\u003c\/strong\u003e that houses a small motor powered by two AA batteries. Once the kit is assembled, you place a water-filled bottle on the base. When turned on, the motor \u003cstrong\u003esets the water into rotation\u003c\/strong\u003e. As it spins, the water is pushed toward the walls of the bottle: the surface dips in the center and an \u003cstrong\u003eair funnel\u003c\/strong\u003e plunges to the bottom, exactly like in a natural whirlpool. Glitter or food coloring added to the water makes the movement more visible. The phenomenon lasts as long as the motor is running, leaving plenty of time to observe it and discuss it.\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eWhat is the difference between the Without bottle and With bottle versions?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eBoth versions contain the same kit: \u003cstrong\u003emotorized base\u003c\/strong\u003e, parts to assemble, screwdriver, and illustrated manual. The \u003cstrong\u003eWith bottle\u003c\/strong\u003e version adds a transparent bottle 6.2 cm in diameter and 19 cm high, to start the experiment as soon as the box is opened. The \u003cstrong\u003eWithout bottle\u003c\/strong\u003e version is designed to work with your own 50 cl plastic mineral water bottle: a simple way to give a second life to an everyday container. In both cases, two 1.5 V AA batteries must be provided.\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eAre batteries included?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eNo. The motor works with \u003cstrong\u003etwo 1.5 V AA batteries\u003c\/strong\u003e, which are \u003cstrong\u003enot included\u003c\/strong\u003e in the box. Remember to include them if giving the kit as a gift, so the experiment can begin as soon as assembly is complete. They go into the compartment integrated into the base, observing the correct polarity. If the kit is to remain unused for several weeks, remove the batteries: this will avoid any risk of leakage that could damage the compartment or the motor contacts. Rechargeable AA batteries can be a practical option for repeated sessions.\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eAt what age can this scientific experiment be done?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eThe recommended age, indicated on the box, is \u003cstrong\u003e8 years and older\u003c\/strong\u003e. The kit contains \u003cstrong\u003esmall parts\u003c\/strong\u003e and is not suitable for children under 3. Between 8 and 10 years old, adult presence is recommended during assembly, particularly for using the screwdriver, connecting the motor, and inserting the batteries. Afterward, the child can fill the bottle, choose their glitter, and launch the tornado independently. Curious teenagers and adults also enjoy it: it is a \u003cstrong\u003escientific experiment for children\u003c\/strong\u003e that remains fascinating at any age.\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eWhat can be added to the water to better see the vortex?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eThe two simplest additions are \u003cstrong\u003eglitter\u003c\/strong\u003e and \u003cstrong\u003efood coloring\u003c\/strong\u003e, not supplied with the kit. Glitter, driven by the current, shows the trajectory of the water: it spirals around the axis of the whirlpool and outlines its shape. Food coloring, used sparingly, gives depth to the water and makes the air funnel stand out. Prefer fine glitter, which follows movement better, and only one drop of food coloring to keep the water translucent. Changing the water between sessions allows you to vary the colors and compare the effects.\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eIs the assembly difficult?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eThe assembly is designed for \u003cstrong\u003ebeginners\u003c\/strong\u003e. The \u003cstrong\u003eillustrated manual\u003c\/strong\u003e details every step: installing the motor and its wires in the base, attaching the propeller and parts, and closing with the included \u003cstrong\u003escrewdriver\u003c\/strong\u003e. No other tools are necessary. Assembly is also the most educational part of the kit: by building the mechanism themselves, the child understands where the movement comes from before observing it in the bottle. Take the time to read the manual thoroughly before starting, and work on a clear table to avoid losing any small parts.\u003c\/div\u003e\u003c\/details\u003e\n\u003cdetails class=\"aa-q\"\u003e\u003csummary\u003eIs TORNADE a good scientific gift idea?\u003c\/summary\u003e\u003cdiv class=\"aa-a\"\u003eYes, for a curious child as well as a weather enthusiast. TORNADE combines three pleasures: the \u003cstrong\u003eDIY\u003c\/strong\u003e aspect of the assembly, the \u003cstrong\u003esurprise\u003c\/strong\u003e of seeing the tornado form, and the \u003cstrong\u003ediscussion\u003c\/strong\u003e it triggers about natural phenomena. It is perfect for a birthday, Christmas, or a family activity afternoon. Just remember to include two AA batteries with the gift, and a small container of glitter for an immediate effect. To complete the set, our Physics and motion collection offers other objects that make the laws of physics visible and tangible.\u003c\/div\u003e\u003c\/details\u003e\n\n\u003c\/div\u003e\n\n\n\n\u003c\/div\u003e\n","brand":"Atelier Atypique","offers":[{"title":"Without a bottle","offer_id":54905645433155,"sku":"AA-TORNADE-SANS-BOUTEILLE","price":29.9,"currency_code":"EUR","in_stock":true},{"title":"With bottle","offer_id":54905645400387,"sku":"AA-TORNADE-AVEC-BOUTEILLE","price":34.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0231\/3365\/0991\/files\/S7604f28de1764f3ab91a88b366656fdf2_1.jpg?v=1791971723"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0231\/3365\/0991\/collections\/S8d410d550e3f4d4da4b6fcd4f02614bas.webp?v=1792401312","url":"https:\/\/atelier-atypique.com\/collections\/physique-et-mouvement.oembed?page=2","provider":"Atelier Atypique","version":"1.0","type":"link"}