3D printing Star type three cylinder pneumatic engine

youtu.be/TJNK66PdgK0

Sorry, it’s a test item, so it’s not suitable for novices. It just works. I want to thank two people first. It was their work that inspired me. Slava_Z yuris。
https://youtu.be/TJNK66PdgK0

I upload step. For reference.

There are a lot of design errors, but fortunately it works. I’ll upload it for a while, and then I’ll write instructions when I have time.

7 19stl is a 10ml syringe. I use diamond blades to cut them.

The cylinder and piston are also 10ml syringes.

You need two syringes.

Five more small bearings are required. 2x5x2.5 x3

6x15x7 x2

One M2 screw 25 mm long.

M3 screw 40 long. 14 roots

M3x10 or m3x16 3.

It takes a lot of brains to install.