Hinged Counterweight (HCW)

Counterweight powered trebuchet where the counterweight is attached to the short arm through a hanger allowed to pivot at the attachment to the short arm (hanger axle).


Power Source



  • Easy to build
  • More efficient than fixed counterweight (FCW) trebuchets
  • Arm rocks back and forth less (Settles faster)
  • Can use loose load cw material with an open top box


  • Less potential energy than super propped trebuchets
  • Counterweight doesn't raise as high as an FCW (reduced potential energy)
  • Increased shock load on axle during launch
  • CW is more likely to twist into legs if suspended by chain, rope, or cable.


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