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List view record 1: Do-It-Yourself Engineering. Episode 17, A Tale of Three Catapults [efilm]List view anchor tag for record 1: Do-It-Yourself Engineering. Episode 17, A Tale of Three Catapults [efilm]
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Do-It-Yourself Engineering. Episode 17, A Tale of Three Catapults [efilm]

2019
Delve into the history of the most potent artillery weapons in the era before gunpowder: catapults. Examine the workings of the ballista, onager, and trebuchet. Then get started on a model ballista capable of hurling a golf ball 200 feet. Analyze the machine's nylon torsion springs to ensure that...
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