ping pong tossing mangonel

Print base with at least 4 perimeter, top and bottom layers, plus at least 40% fill.

You will need one 3mm x 15mm machine bolt for the trigger release.

The craft lace leather is a good option for the energy storage. However, kite string will also work but not as well.

Thread the leather/string through the ratchets and wrap around the two pins 4 to 6 times. If you use more than 6 wraps then use two 3mm x 15mm machine bolts.

Tie off the leather string and crank the two ratchets in