{"product_id":"low-temperature-stirling-engine-model-runs-on-a-cup-of-hot-water","title":"Low-Temperature Stirling Engine Model – Runs on a Cup of Hot Water","description":"\u003ch2\u003eA desktop heat engine — no open flame required\u003c\/h2\u003e\u003cp\u003ePlace this low-temperature-difference Stirling engine on a cup of hot water, allow the base to warm, and give its iridescent flywheel a gentle turn. With a sufficient temperature difference between the warm base and cooler top, it converts heat into visible mechanical motion.\u003c\/p\u003e\u003ch3\u003eExplore thermodynamics\u003c\/h3\u003e\u003cp\u003eAir moves between warmer and cooler regions, expanding and contracting. Pressure changes drive the power piston and connecting rod, while the flywheel carries motion through the cycle. A hands-on demonstration of heat, temperature difference and mechanical work; not a practical electricity generator.\u003c\/p\u003e\u003ch3\u003eHow to use\u003c\/h3\u003e\u003col\u003e\n\u003cli\u003eAn adult fills a suitable cup with hot water and sets it on a stable, level surface. The recommended cup opening is approximately 90 mm.\u003c\/li\u003e\n\u003cli\u003eCenter the engine securely on the cup. Allow about 20 seconds to warm, then gently start the flywheel.\u003c\/li\u003e\n\u003cli\u003ePerformance depends on water temperature, the temperature difference and setup. Let the model cool before storage.\u003c\/li\u003e\n\u003c\/ol\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eApproximate height: 160 mm\u003c\/li\u003e\n\u003cli\u003eBase diameter: 105 mm; flywheel diameter: 120 mm\u003c\/li\u003e\n\u003cli\u003eListed model weight: approximately 125 g, excluding shipping packaging\u003c\/li\u003e\n\u003cli\u003eAluminum alloy support, quartz heating cylinder and plastic flywheel\u003c\/li\u003e\n\u003cli\u003ePower cylinder: Ø12 mm, 10 mm stroke\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eHot water and warm metal can burn; adult handling and supervision are essential. Handle the flywheel and quartz cylinder gently, keep fingers clear of moving parts, and do not oil the mechanism. Cup and hot water are user-supplied.\u003c\/p\u003e\n\u003ch3\u003eDesign highlights\u003c\/h3\u003e\u003cp\u003eThe transparent iridescent flywheel makes rotation easy to observe. A low-friction shaft, silicone diaphragm and connecting rod support smooth movement. Powered by a hot-water temperature difference, with no batteries or open flame required.\u003c\/p\u003e","brand":"RetroMakerKits by innoelement","offers":[{"title":"Default Title","offer_id":67621208227923,"sku":null,"price":18.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0710\/0891\/1443\/files\/05.jpg?v=1791426676","url":"https:\/\/www.retromakerkits.com\/products\/low-temperature-stirling-engine-model-runs-on-a-cup-of-hot-water","provider":"RetroMakerKits by innoelement","version":"1.0","type":"link"}