Propeller Launcher

This is a modified version of Propeller Launcher based on Lucas Hannert's Launcher design.
[Original design.](https://makerworld.com/en/models/628601#profileId-553231)

I was unable to print the original design on my printer due to its lack of precision and the use of PET bottles as filament. However, if you have a high-precision printer (such as a Bambulab, for which the original design was developed), I recommend using the Lucas version.

I also recommend scaling the propellers up to 102% for best results

Update: This is the second version of the Propeller Launcher.

Changes made:

- The sizes of all planetary gearbox stages have been adjusted to be fully identical. The only differences are the first-stage carriage, which has a thread for the lower housing, and the third-stage sun gear, which has a different output shaft socket shape. All other components in the three stages are identical and interchangeable.
- The diameter of all gear teeth has been reduced by 0.2 mm to improve sli