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How to make a PVC powered catapult

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Of the many catapult designs that can be easily made by high school students, one of the best creations in terms of ease of construction, consistency, and ease of launch. To build a simple PVC powered catapult simply create a simple square base and attach a single crossbar approximately 3 feet above the height of the base. Attach one end of a 9ft long, 1in diameter PVC pipe directly below or slightly behind the crossbar. Be sure that the PVC is in front of the crossbar. To the other end of the pipe attach a holding mechanism to place your launch material into. Approximately 1 ft. from the top end of the PVC attach a strong rope which will be used as your firing mechanism. Run the rope under the back of the catapult. Before pulling on the rope drive a stake into the ground on the inside edge of all the corners to prevent the catapult from moving. Pulling back on the rope will bend the PVC towards you allowing someone else to load the object to be fired. Releasing the rope will allow the PVC to snap back to its original position launching the object.

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