The frame of the mangonel is composed of thick wood rectangles laid flat on the ground. Two holes are bored into each side of the frame through which run skeins of rope. In the middle of the sinew ropes is the throwing arm with a basket attached to one end. A lever attached on one side is used to torsion the skeins as well as ratcheting down the arm.

The mangonel is centered, facing starboard.
The mangonel's arm is in the forward position.