This is a demonstration of the "impossible" Ice Piston going through one cycle of cold hot.
This tech is open source, public domain, free as the wheel.
If you build the device as I describe it you'll want to set it in a pan in your freezer in case it works "too" well and drives the plunger all the way out of the hypo.
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I look forward to seeing what you do with this!
I'll gladly post links to smallest, fastest, and most powerful ice engines.
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post comments, message me, and at Reddit.com I'm known by the sig ----__---- (four hyphens, two underscores, four hyphens)
check the description of how it works in my other video at https://youtu.be/tr6rzz6IVs4