Air pressure piston engine A i r p r e s s u r e p i s t o n e n g i n e

This engine was my first 3D modeling project, which I made in 6th grade. It’s a single-cylinder piston engine that runs on air pressure instead of fuel: air comes in through the tube on top to drive the piston, and a connecting rod turns its motion into rotation at the crankshaft, which spins on two ball bearings.