Rotary vane engine

https://www.youtube.com/watch?v=olV_kzSb-IQ

http://www.flyingkettle.com/japsite/conpaper.htm  steam vane engines

https://www.youtube.com/watch?v=mcajheP1RSI from https://www.practicalsteam.com/

https://www.youtube.com/watch?v=u0fLhtWeKjQ A compressed air or steam operated rotary engine that uses sliding vane block that oscillates on a steel shaft. A quick assembly clip and see it running

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