bl.

Warwolf :3 / Floating-arm trebuchet

A floating-arm trebuchet built around a moving pivot, a vertical counterweight drop, and an adjustable launch. A project in turning a simple physical principle into a repeatable mechanism.

Project
Floating-arm trebuchet
Focus
Mechanisms / CAD / Fabrication / Testing
Team
Brian Lu & Andy Truong
Year
2023
Isometric engineering drawing of the floating-arm trebuchet

01 / The mechanism

Let the pivot move.

The floating pivot allows the counterweight to fall along a vertical path. A wooden frame guides the arm on bearings, while adjustable weights and the sling give us ways to tune the launch. CAD helped us work through the geometry before fabrication.

02 / Iteration

The small details change the launch.

An aluminum C-channel arm reduced weight, while cross-bracing stiffened the wooden frame. Testing highlighted the importance of arm orientation, alignment, and friction. We collected launch data to build targeting tables and adjust range using the counterweight.

Next projectBungee drop