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In examining medieval drawings of trebuchets, Neel can't help but notice that many are represented with wheels. He decides to add what is one of history's most fundamental inventions to his second prototype. To nearly everyone's surprise, the wheeled trebuchet shoots about one-third farther than its fixed counterpart. Previous Next Medieval Arms Race | NOVA Builds a Trebuchet | Life in a Castle Destroy the Castle | Resources | Transcript Medieval Siege | Pharaoh's Obelisk | Easter Island | Roman Bath | China Bridge | Site Map Editor's Picks | Previous Sites | Join Us/E-mail | TV/Web Schedule About NOVA | Teachers | Site Map | Shop | Jobs | Search | To print PBS Online | NOVA Online | WGBH © | Updated November 2000 |