Floating Axle Trebuchets (F-Series)

The axle of these trebuchets is wheeled and is allowed to roll along a rail or track. The first one built was a Floating Arm Trebuchet, made by Ron Toms.

Power Source

Usually gravity or springs.


  • Straighter counterweight drop
  • Reduces frame stress
  • Increased efficiency


  • Track Gap in many designs
  • Hard to build

Floating Axle Trebuchet Types


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