Stirling engines are pretty interesting since they work on the principle of converting heat into mechanical work, which means the sun is a pretty good source to generate clean power. Some enterprising brain decided to go even greener with this DIY Stirling engine which is made out of soda cans, spinning at a whopping 860RPM – which is no mean feat. A solar concentrator will function a source of heat instead of candles, and is notable for its quietness and much more efficient level compared to solar cells. Check out the soda can Stirling engine in action in the video above.
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