In Backyard Catapults, Bill Wilson provides detailed instructions and illustrations for homemade catapults, as well as construction information on ballistas, onagers and trebuchets; information on catapult web sites and catapult contests around the country; and catapult history.
But why stop with catapults? With the information in Ed Carson's BAD: A Video Guide to Constructing and Firing Your Own Backyard Artillery Device, you can assemble your very own backyard artillery device (a self-contained, electrically fired, smooth bore gun powered by a fuel-air mixture of high-octane gasoline and pure oxygen), using just an assortment of parts available at any hardware store and a few hours of semiskilled labor.
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