This little desktop paperweight, also known as a Stirling engine, will help you relax at your desk with its soothing sounds.

For the fuel I used denatured alcohol as it burns cleaner.
Heating the bulb with the torch initially makes the engine run faster but when the heat is transferred to the cold piston it bogs down, cooling the cold side of the heat exchanger will increase the RPMs and will run more efficiently.

Stirling Engine Kit: https://amzn.to/3b0DuQa

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