Ancient Chariot Model Series -Middle Age Trebuchet
Gravity pitching machine, also known as counterweight riprapper, return gun and Xiangyang gun, is called Frankish gun by Islamic scholar rashaden in history collection. The main structure of this pitching machine is a lever, one end of which is a shell and the other end is a counterweight. First, pull down the shell end with human or animal force and make the counterweight end rise to a high place to store energy. When launching, release the lever to make the counterweight end fall and make the shell rise and project.