Based on the Toothed rack and gear module 1.5 by denmx, I created the Pull-O-Copter!
A toy that lauches a 100mm (or experimental 150mm) diameter rotor up in the air with one sharp pull!
Perfect for kids and everyone that doesn't hate fun.
Can be used outdoors and indoors.

If you have problems with the files try using the _fix files provided by HAMMER_T(https://www.thingiverse.com/HAMMER_T) for better results

Thanks to HAMMER_T for providing the fixed files!

Pull-O-Copter in action (tiny video):
https://youtu.be/WDU0ompqszc

You'll need 2 m3 screws, length: 10-13mm

Update1:
The rotor now comes in 2 sizes, 100mm and 150mm (150mm doesn't provide much lift yet, will update soon).
Enjoy!

Update2:
Modified the 150mm rotor file for better performance

Update3:
Added fixed files.

Update4:
Added a short version of the key for smaller buildplates.
Its not tested yet so i dont really know if its long enough to actually let it fly.

Printables link:
https://www.printables.com/social/279659-toastify/prints

modded Zonestar P802m

Yes

25%

After printing make sure to get off the rotors supports cleanly for better aerodynamics.

If the key and the main part dont perfectly work at first just grind them a little by inserting the key multiple times and/or use lubrication.