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Building a Catapult

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Building a Catapult

Building a Catapult

Building a Catapult

  • Download
  • <iframe src="https://www.npr.org/player/embed/1979279/1979280" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">

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NPR's Scott Simon talks to mechanical engineer and catapult enthusiast William Gurstelle about his obsession. He is the author of the new book The Art of the Catapult.