Сверхинженерная пропеллерная пусковая установка

This propeller launcher is capable of taking any torque you can give it. With a gear ratio adjustable between 1:72 to 1:182, this thing can store an enormous amount of energy in the propeller before releasing it to fly over 350 ft. This youtube video shows it in action : https://youtu.be/1r3lER8qkuw?si=EjQiGRIEY7DaVpfK

The launcher is capable of sustaining very high input forces thanks to it's compound planetary gearbox. A pair of swapable spur gear (for gear ratio adjustment) and bevel gears complete the transmission.

A sturdy stock and grip accompany the launched to ensure you can firmly brace it during the acceleration phase.

The design includes parts to make it left or right hand cranked.

FDM printing. See attached detailed instructions (30 pages!).

Your printer needs at a minimum a 183 mm cube print volume.

Important tips:
- Do not fill completely the BB tracks. Leave 1 bb out. It allows them to spin smoothly.
- Purchase of 1/4-20 x 1" (length), x1 1/2", x2 1/4" is required. Total screw amount is 41. 1/4-20 nuts are required too.
- Purchase of 6mm balls is required - I recommend airsoft BBs as they are very cheap.
- About 2.5 kg of filament is needed.