Endwood Castle – The Ballista – Siege Weapon

The ballista was an ancient missile weapon that launched a large projectile at a distant target.Developed from earlier Greek weapons, it relied upon different mechanics, using two levers with torsion springs instead of a prod the bow part of a modern crossbow, the springs consisting of several loops of twisted skeins. Early versions projected heavy darts or spherical stone projectiles of various sizes for siege warfare.