Launch It! A Trebuchet Contest

This October, Central Rappahannock Regional Library will be running a trebuchet contest. A trebuchet is a kind of medieval siege engine. Full-sized ones were used to smash down castle walls. This contest will be a fun, family event, and you can join in by bringing your handcrafted trebuchet and testing it against your competitors!

Launch It! will begin at the Fredericksburg Branch on Saturday, October 27, with registration at 9:30. The contest will take place at Old Mill Park, 2201 Caroline Street. 

New to trebuchets? Join us for a Trebuchet Construction lesson at the Fredericksburg Branch, Thursday, September 13, and Tuesday, October 16. These are build it sessions in the MakerLab.

Categories are: 

  • Middle School
  • High School
  • Adult
  • Family

Entries will be judged on the following criteria:

  • Distance
  • Accuracy
  • Most Creative Trebuchet


  1. You must have a name for your device (trebuchet). For example, King Edward I's trebuchet was called Warwolf.
  2. The dimensions of your trebuchet may be no larger than 2 x 2 x 2 feet.
  3. CRRL will provide projectiles which are less than 2 inches in diameter.
  4. Projectiles must remain intact until they hit the ground.
  5. All trebuchets must be propelled by gravity (no springs, no elastics, no compressed air or water, no explosives).
  6. CRRL judges are the final arbiters on safety.