Compressed Air Engine (NO PUSHRODS)

This is a Compressed air engine that can run off your own breath! There are no pushrods, cams, or belts. Just print, build, and run!

To build this engine you will need:
8 M3x20 Screw (head and bottom end)
4 M3 Locknuts (Bottom end)
6 M5x25 Screw (flywheel)
1 M3x10 screw (piston)
0.5mm Rubber sheet (gaskets)
5mm ball bearing (for airtight seal) I used a BB pellet
2L Soda bottle
Tubeless presta valve (for bikes)
Bike pump or compressor
Silicone based lubricant (I used bike chain lubricant)
3.8mmID 5.2mmOD O-rings
hot glue
CA glue (superglue)

The engine in action:
https://youtu.be/lljzR_W2DOc

The build:
https://youtu.be/3rphVOjEvbU

I've built a V2 if you want to see that:
https://www.thingiverse.com/thing:4860073

If you guys want to see more projects like this, check out my channel:
https://youtube.com/c/AxelDayton