{"product_id":"stirling-engine-model-hot-air-motor-model-physics-twin-engine-generator-model-with-led-light-flywheel-science-experiment-toy","title":"Twin-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 #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 .aa-badge-noir{background:#1A1A1A;color:#FAC775}\n.aa 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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":172.0,"currency_code":"USD","in_stock":true},{"title":"Golden","offer_id":54860801638723,"sku":"1005004879058245-Golden","price":172.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0231\/3365\/0991\/files\/Sfa3718df67d145db9228453f6838a150i.webp?v=1791060849","url":"https:\/\/atelier-atypique.com\/products\/stirling-engine-model-hot-air-motor-model-physics-twin-engine-generator-model-with-led-light-flywheel-science-experiment-toy","provider":"Atelier Atypique","version":"1.0","type":"link"}