World’s Simplest and Newest Trebuchet (Walking Arm Trebuchet)

This is the world premier for our new trebuchet design. Not only is this trebuchet simple, but it is also extremely efficient. It has many advantages of a floating arm trebuchet but with fewer parts, less friction, and a unique projectile launch path. As you can see in my son’s video above, the projectile never swings backward beyond its starting point, reducing the danger to bystanders behind the trebuchet. Using this design last fall, my 8-year-old son set the all-time record for best design at the Vermont Pumpkin Chuckin’ Festival. His 20 pound, 41 inch tall trebuchet threw a 3 ounce ball 266 feet. My 500 pound, 10 foot version threw a 5 pound cantaloupe over 700 feet, but it went so high and so far that the spotter never saw it pass over him on its way into the woods.

the original document is on https://www.instructables.com/id/Worlds-Simplest-and-Newest-Trebuchet-Walking-Arm-T/