This is a printable model of a 2 stroke combustion engine. I made this project with Solidworks from a real Kiosho RC engine. It consists of 8 different pieces: the engine block, the cylinder, the cylinder head, the crankshaft, the piston bolt, the piston, the connecting rod and the rear cover. All parts are designed to be assembled, and with the help of some sandpaper and patience the whole set has correct moving. I post a photo of the exploded view of the motor in order to explain and simplify the assembly part.
This can be easily used to learn and explain how a combustion engine works, and also as a great miniature.
Speed: 30-40 mm/s