3d printable Whipper Trebuchet

Designed to fit on an ender 3, i used metal skewers for the pivot pins and axles
Supports = Arm only
Arm has a hole in the top for a piece of wire/paperclip etc for the launch pin
https://youtube.com/shorts/4NkcMLq5KF8?si=IcuPyNHY1d2K9_2g
Trebuchet in action
I heated the trigger lightly with a lighter and bent it into position with a bit of trial and error
https://youtube.com/shorts/lDmOOdaQnIA?si=WgyAZqcPEjH1mf8v
2nd video with trigger

Sling must be long enough in the loaded position to basically reach the main pivot so it rotates around the centre point and doesnt wip out too early in turn catching the frame

You want the sling releasing the projectile as the counterweight hits its lowest point for maximum efficiency = that snap which = the powers in the projectile with the least amount of energy left in the counterweight