It launches a projectile consistently. Pull back, hold the tail, line it up, and release. Print using a light colored filament to be able to write measurements on the sides.
I use https://a.co/d/1lBrvpR These #4 thread rolling screws (Torx T10 driver needed).
You will need small rubber bands like these: https://a.co/d/hvP9giv
Then, just print and shoot. The V shaped slot and head adapt to several different projectile sizes and keeps it centered while shooting.
Feel free to design a constant initial height pivot that would allow you to launch at different angles while keeping the launch position the same.
Launcher_2023_v4.3mf | 133.5KB | |
Launcher_2023_v4.f3d | 1.1MB | |
Launcher_2023_v4.step | 733.6KB | |
Rails.3mf | 21.2KB | |
Rails.stl | 92.5KB | |
Slide.stl | 23.9KB | |
Slider.3mf | 6.9KB |