Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

This was an earlier EBay purchase post where I learned about its history and origin. The cylinder was made from spiral wound HVAC tubing so I imagine he had this in his shop.  I’m improvising with a cylinder design I used in my Stirling engines. The fins are press fit. This engine is really just a pattern since I decided it’s to far gone to restore.