EISCO
This student-constructed trebuchet will throw the included ping pong ball more than 30'. With a simple counterweight, beam arm, and sling, heavier projectiles can be launched much further than is possible with much more complicated siege engines. The key to this success is the efficiency with which the gravitational potential energy of the counterweight can be converted to kinetic energy of the projectile.
Material: Birch Veneer Plywood
Size: 17"L x 6"W x 29"H
Weight: 4.7 lbs.
Includes
base plate
A-frame supports
4 wheels
beam arm
dowel
release pin
leather pouch
string
counterweight
counterweight pin
wooden pins
wood screws
ping pong ball
cardboard storage box
instructions