The thread has gotten a little off topic and appeared to even be getting a
little arguementative then it morphed into interesting .
I've always been some what of a gadget guy . When I was a kid I took
everything apart but now I wouldn't know much of what I was seeing .
I have messed with Sterling cycle model engines but nothing useful .
They are silent but do not generate much power generally .
Here is a company that makes claims,still not a lot of power and quite large
http://redhawkenergy.net/qnergystirlingengine.html
At one time ( 100 yrs ago not sure ) a sterling fan for the desk was
manufactured & sold in this country but elect fans soon took its place .
Some are still around as antiques
However I think that same fan is still manufactured in India and is / was
available here . The most useful I have seen is also from the past
In parts of the country that had natural gas piped to homes for heat/lights
etc a sterling engine 2 or 3 ft tall was married to a well pump to slowly fill
a elevated water tank presto running water , pretty fancy stuff back then .
Here is another novel use of heat generating elect to drive a fan .
https://www.amazon.com/VODA-4-Blade-Fireplace-Increases-Friendly/dp/B01CD2AIV8/ref=sr_1_3?dchild=1&keywords=sterling%2Bengine%2Bfan&qid=1597934047&sr=8-3&th=1
You guys ever heard of a Mento Wheel ? Take a look
https://en.wikipedia.org/wiki/Minto_wheel
http://rexresearch.com/minto/minto.htm