Small Vacuum/Air powered engine V2

Version three is now out!: https://makerworld.com/en/models/2559684-small-vacuum-air-powered-engine-v3-throttle

This small engine runs great! It can be powered by a regular vacuum (Tip: make sure it’s not a weak vacuum; I like to remove the air filters). After assembling the engine, I recommend supergluing the top and bottom pieces together. Be careful not to get glue on the crankshaft itself. The crankshaft should spin smoothly and make several rotations with ease. You can actually also blow into it, it works well that way too!

I recommend printing with at least 30% infill and walls 1mm or thicker. For filament, really any works well!

This is the V2 version, which now includes:

- Mounting areas for screws (if you want to put it onto a piece of wood for example) - Dual exhausts (which look epic!) - A larger and more balanced flywheel - An output for propellers - Two new accessories (some propellers) - Counter weights (which might balance the engine a bit more) Overall, it’s more refined with fewer small errors.

I’m open to suggestions, feedback/photos and comments. Thank you!