3d Printable Air Balloon Engine for LEGO

A rework of [this little motor](https://skfb.ly/6LQBR). No more bolts, now need only a nitrile glove and two balloons to assemble it. You can see what it's capable of [here on Youtube](https://youtu.be/5G4Wwa94_aM), and all the .stl files can be downloaded [here on the MakerWorld](https://makerworld.com/ru/models/1783606-air-balloon-radial-piston-engine#profileId-1921213). 

♥ 101