ping pong tossing mangonel

thingiverse

Print a base with at least four sides, top and bottom layers, plus at least 40% fill. You will need one 3mm x 15mm machine bolt for the trigger release mechanism. The craft lace leather is an excellent choice for storing energy. Kite string can also work but will not perform as well. Thread the leather/string through the ratchets and wrap it around the two pins four to six times. If you use more than six wraps, use two 3mm x 15mm machine bolts instead. Tie off the leather string and turn the two ratchets in the direction of the arm throw. The ratchets will click and prevent the wrap from unwinding. Use pliers to complete the ratcheting process. Tighten until the ping pong ball flies eight to ten feet. Over tightening the wrap can cause the base to implode. Do not over tighten the energy storage material. https://youtu.be/TxMt6K7XEIY