While his machine looks very cool, Haeuser charges 10 Euros for the full manual and files on his website. With no included prospects of using any generated energy, I don’t know if that´s worth it for you. There are several other models for 3d printed Stirling engines online for free; only they’re not solar powered. But if you just want to learn and see how a Stirling engine works, they maybe are the better option.
License: The text of "A solar engine you can 3D print" by All3DP is licensed under a Creative Commons Attribution 4.0 International License.
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