Only one part of the multi-cylinder H engine can be seen on my animation. As you can see from the history, it can be 24 cylinders .. the order of ignition can also be seen in wikipedia .. If we properly think, the customs of the main cylinder system from Felix Roller, may not have ANY ONE SCREW to twisting .. :wave:
https://en.wikipedia.org/wiki/H_engine
Formel 1 too :
https://en.wikipedia...h_Racing_Motors
https://rafaelschelb.../11/23/60s-h16/
https://en.wikipedia...Lycoming_H-2470
https://en.wikipedia.../Fairey_Monarch
https://en.wikipedia...Whitney_XH-3130
Andrew