Smokey Yunick's Adiabatic Engine (Hot Vapor Cycle Engine)

[Henry W]

Just ran across this last night and never knew Smokey Yunick made such an engine. Just found bits and pieces but it was good reading. I'm interested in finding out more to see if it was mostly hot air, or it truly worked well.

https://www.eng-tips.com/viewthread.cfm?qid=78116

https://schou.dk/hvce/

https://www.hotrod.com/articles/hrdp-1009-what-ever-happened-to-smokeys-hot-vapor-engine/

https://www.digitaltrends.com/cars/adiabatic-engines-from-the-1950s-could-have-saved-the-planet/

https://patents.google.com/patent/US4862859?oq=4862859

https://www.hemmings.com/stories/2019/05/14/cumminss-adiabatic-engine-experiments-produced-some-of-the-worlds-most-efficient-internal-combustion-engines