|This trebuchet at Castle Urquhart is a modern reconstruction of one type of medieval seige engine. While a catapault is essentially a bucket on a weighted arm and a ballista is a giant crossbow, a trebuchet is a bit more advanced. It combines the weighted arm of the catapault with a sling fitted with a basket on the end. A stone flung from the basket gets an extra boost from the sling. Since the "power" for the engine comes from a counterweight instead of tensioned rope, as with the catapault and ballista, it also has a much heavier payload. © 2004 Lawrence I. Charters
Konica Minolta Camera, Inc.
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