Stirlingengineforum.com

Some of the 197 models of the 2017 Coolspring expo
https://youtu.be/cap_1dKp18Y
bit more action on heavy side
https://youtu.be/uA_DIgn1aJI

2021 Greenville Ohio Power of the Past engine show
https://youtu.be/MO7lW-la7Bs

Half-scale model of one of Robert Stirling's original models
https://youtu.be/FZVOnw0nlWc

Compressed air locomotives from yesteryear used in mines and tunnel building.
http://www.douglas-self.com/MUSEUM/LOCO ... oco.htm#fs

Trams and cars powered by emission free and electric free compressed air
http://www.douglas-self.com/MUSEUM/TRAN ... air.htm#fs

In New Orleans, in 1872, fireless locomotives that used ammonia instead of compressed air and steam as working fluid were used in place of horsecar railroads. The cost was $ 6.775 per day and $ 9.910 per day for animal towing.
https://www.tramwayinfo.com/Tramframe.h ... stc123.htm
https://thereaderwiki.com/en/Fireless_locomotive



Some newer stuff,
Eccentric shaft, rotary vane air engine, expendable self-lubricating vanes, (distributor rotating with axel not shown)
https://youtu.be/WFsVAXYeHm8?t=8