Trigger and Sling

This is the trigger for the catapult.

  A string is tied onto the trigger, and when the string is pulled the trigger is released from the eye hook allowing the weights to go down and launch the projectile.

Mckenna pointing to the trigger

A 24 in. of string is tied onto the bottom eye hook, and the string is then connected to the sling. Then a 28 in. of string is tied onto the other side of the sling, with a eye hook tied to the end of it. The eye hook is then hooked onto the nail at the top of the throwing arm,  which comes off once the projectile is released.

Our first sling