FWIW, from the peanut gallery there has yet to be an affordable Stirling Engine that will compete with a comparable-sized Steam (Vapor Powered) Engine.
That is why I suggested going to (In the words of Kyle McCallister) going to a F...ing used Scroll compressor off an automotive air conditioner and using it as a one moving-part-rotary-closed cycle-Expander Engine, Steam (or Propane Vapor) heated from Any Heat Source, like a pot on top of the stove or a heat exchanger in the chimney, solar-warm-water, wood chips, or whatever will burn. I thought Stephen was serious about emergency back-up out in the Ontario woods. Having spent my early childhood in the great depression era, a 30 watt light bulb and running water was stuff we dreamed of. After WW II "prosperity" it took me a long time to get used to taking a crap in the house. Fred
