any way ... it is very very intresting engine !

I NEED / I WILL TEST THIS IN MY HOME

I WANT TO EVALUATE efficiency ???


STIRLING's engine max about 40 - 50 percents
BUT not soo...soo easy to build this engine

THIS WHAT YOU SHOWED is very simple ( more nice to build compare to Stirling )

https://en.wikipedia.org/wiki/Stirling_engine