Brief Description:  The mangonel was a popular medieval siege weapon classified as a torsion catapult. It consisted of a large wooden frame with a single throwing arm that had a bowl-shaped bucket at the end. Powered by twisted ropes or sinew, it was primarily used to hurl heavy stones and incendiary devices.

Key Design and Mechanical Features:

The Frame: Constructed from heavy local timber, the frame had to support the immense stress of the machine discharging. Some were mounted on wheels to increase maneuverability across the battlefield.

The Throwing Arm: A single large wooden lever with a bowl, cup, or pocket (often called a spoon) at one end to hold the payload.

Power Source: Unlike the counterweight-driven trebuchet, the mangonel stored its mechanical energy through torsion. A large skein of tightly wound rope (often made of horse or human hair for maximum tensile strength) was twisted, storing explosive energy when the arm was cranked downward.

Trigger Mechanism: A release pin held the arm in the tensioned position. When pulled, the twisted rope violently snapped back, driving the arm upward to slam into a padded horizontal beam. This sudden stop sent the projectile soaring forward in an overhead arc.