How To Make a Lego Technic high rpm 1 Cylinder Pneumatic Engine - Parts list now available - YouTube
Nico71 - Lego Switchless Pneumatic engine mk2. With stacked 4 valves instead of side by side, one cylinder and two speeds gearbox. Expected to me mounted soon in a two wheels creation
Air Powered Lego Engine Experiments - YouTube
Valve for Lego Pneumatic Engines by Ja Hey 64 | Download free STL model | Printables.com
I thought you might like the pneumatic engine i built : r/legotechnic