Trebuchet

[Sonia]

A superior piece of medieval [siege] weaponry which is capable of hurling [ninety] [kilogram] projectiles over a distance of three hundred metres using a one-tonne counterweight. Capable of smashing castle walls with ease, unlike those inferior catapults.

[Becky]

A machine used in medieval siege warfare for hurling large stones or other missiles.

[Raeanne Dimick]

a large device used in wars in the past for throwing large rocks, for example at the walls of a castle that was being attacked: