Use the following links to build your catapult or trebuchet
Trebuchet Plans
Catapult Plans
Also you can use the following database and type in "Trebuchet" or "Catapult" as a search
ABC Clio Databases
For more information on the history of medieval weaponry:
History of Medieval Weapons
Trebuchet Plans
Catapult Plans
Also you can use the following database and type in "Trebuchet" or "Catapult" as a search
ABC Clio Databases
For more information on the history of medieval weaponry:
History of Medieval Weapons