The flywheel is spun up to speed using a hand crank, through a timing belt and ... the walking-arm trebuchet is perhaps the most oddball of all. Video after the break.

The Trebuchet was invented by Mariano Taccola, "the Sienese Archimedes." This war machine was invented during the Middle Ages (around 1400 AD) in order to destroy the great walls of the enemy palaces.

Have you ever sat down and thought “I wonder if a trebuchet could launch a projectile at supersonic speeds?” Neither have we. That’s what separates [David Eade] from the rest of us.

The trebuchet was one of the most devastating weapons of the Middle Ages. During medieval sieges, this destruction machine crushed castle walls. Using trial and error, medieval engineers adjusted ...

How you design your trebuchet will decide the fate of the castle wall—and it may also decide your fate as well. With some choices, your missile might land too short or fly too far. With others ...