Thursday, September 3, 2009

How to Build A Trebuchet

For instructions on how to build a trebuchet and more details see or any number of websites dealing with trebuchets and pumpkin chuckin' contests.

For example, here are plans for a tennis ball trebuchet. This is a 30 inch (axle height) Trebuchet and it is a working model suitable for learning the fundamentals of Hinged Counter Weight Trebuchet. The base is 34 inches long and 31 inches wide, making it suitable for many projects that are restricted to 1 meter dimensions.

Tennis Ball Trebuchet

Axles and Counter Weights (CW's)

Here is information about:
  • FAT/F2K Trigger, the basic concept.
  • Phssthpok's Rule, concerning how much CW to use.
  • Parachutes to avoid head dings.
  • Wheels and Trebuchets.
  • Bracing an Axle.
  • Pouch Roll, why sling anchor position is important.
  • Taught Line Hitch
Here are some do-it-yourself projects from on how to build a Trebuchet.