A miscommunication has led timber framers to drill too big a hole in the arm's axle, compromising its strength. Beffeyte's strategy is to slowly increase the counterweight so as not to stress the arm.

The first toss falls woefully short, as expected. Weight is added to the carriage, but still its missiles miss their mark. Before the last toss (the remaining timber framers have a plane to catch) Brandt nudges the ball's guiding ramp a sword's width to the left. The launching prong also is bent slightly.

The final toss is a bulls-eye, proving that Edward I of England could have used this giant siege machine to vanquish his Scottish enemies. The men go home satisfied, their hands-on experiment a castle-smashing success.

Previous



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

Support provided by

For new content
visit the redesigned
NOVA site