who says stirling engines are all hot air

[octo0072000]

see you tube video neat set up and self propelled
by hot air

http://www.youtube.com/watch?v=qS5x91CZbtY&feature=g-vrec&context=G2dcc721RVAAAAAAAABQ

 

[rtbcomp]

I like them. There's a Victorian one at Blists Hill Victorian Village built into a pot-belly stove.