Rubber Band Trebuchet

The rubber band should pull on the sides of the vertical curve not the sides of the hooks.

Rubber band trebuchet.

This catapult worked by storing elastic potential energy the type of energy you get from stretching something such as a rubber band or a spring and rapidly converting it to kinetic energy the. Drill with bits wrenches rotary tool with bits clamps procedure. I opted for rubber bands because they gave me better results with this particular trebuchet than weights and they are much more compact. The trebuchet is a medieval device not unlike a catapult that was used in warfare to hurl damaging objects from afar into areas that were otherwise inaccessible such as over castle walls and into forts.

A trebuchet works differently. Don t make the rubber band really tight. Rubber band trebuchet materials. 2 wood blocks 5 1 2 x 2 1 2 x 1 d e 3 wood dowels 3 16 x 2 1 2 a b c 1 balsa plank 3 4 x 1 2 x 7 f 1 8 32 x 5 bolt 1 8 32 nut 8 8 washers 1 4 screw eye hook 1 plastic egg shell orthodontic rubber band super glue tools.

If it s too tight it will deform the hooks and if it s just snug you will actually get a little assist from the rubber. Tape the rubber band onto the stick about 1 inch below the paper cup. You want the rubber band to wrap on the side without the wire back and forth.