Low-Temperature Stirling Engines are great physics toys that you can power with a hot tea or coffee. They are made in various shapes and sizes. The D16-C Low-Temperature Stirling Engine is another one that can run on hot water. It is made with SUJ alloy steel and has two flywheels.
Tea Coffee Mug Stirling Engine ☕ Gadgetify
Simply bring a hot tea or water over 80C, and you will be able to get this engine moving. The bottom plate absorbs the heat while the top plate remains cooler due to the surrounding air. The heat expands the gas inside to push the piston. As the gas gets cooler, it contracts and pulls the piston back.
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