This is a simple thermal engine you can build at home. It's power/size ratio is amazing and the temperature range it operates in can be sourced cleanly and greenly :)

... how do you make one? did I miss a link somewhere?
<p>I'll have more detailed info up in the next few weeks, but for now the &quot;description&quot; video lays out the basic principles.</p>
<p>Cool idea!</p>

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