It is no secret that you can build all kinds of fun things with a decent 3D printer. This is a 3D printed solar Stirling engine that you can build without needing a milling machine or a lathe. It can be powered directly by sunlight. When the weather conditions are not favorable, you can rely on reflector mirrors to increase the efficiency. The engine even works indoors.
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3d printed Solar Stirling Engine
The above video shows this 3D Printed Solar Stirling Engine in action. It measures 270 mm x 330mm x 370 mm. The good news is you can buy the construction manual to build one of these for yourself.
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