compressed air engine / pneumatic engine

A simple but good working compressed air engine. It works even with your lung, no pump required! I designed it because i wanted to make my own motor and develop my design skills and my knowledge about tolerance in 3D printing. Im also fascinated how simple it is to build such a nice engine.

Parts you need:
- 4 M3x16mm screws with nuts for the casing
- 2 M3x12mm screws with nuts for the cylinder and the crankshaft
- 1 M2,5x14mm screw (It is placed at the top of the "Ventilhebel" to adjust the opening time
of the Valve. Cut away the head of the screw and make it a bit smaller at the top for
more air flow)
- 1 6mm BB (from a Airsoft gun for example)
- 1 O ring with inner diameter: min. 5mm and outer diameter: max. 7mm
- 1 Ball Bearing with inner diameter of 8mm and outer diameter of 22mm
- some sealing paste to prevent "Gehäuse" and "deckel" from leaking
- Glue for the parts of the casing

Use a little bit of the sealing paste to fix the O ring in its position.