In this revised and expanded edition of Whoosh Boom Splat , William Gurstelle professional engineer and author of Backyard Ballistics shows ordinary folks how to build a dozen fun and impressively powerful launchers, from vortex launchers and clothespin shooters to Yagua blowguns and jam jar jets with inexpensive household and hardware store materials and this step-by-step guide. Clear instructions, diagrams, and photographs show how to build projects ranging from the simple elastic zip cannon and marshmallow shooter to the more complex high-voltage night lighter 36 spud gun and T-shirt cannon. This new edition includes three new projects along with additional diagrams, photographs, and fascinating science information throughout. With a strong emphasis on safety, the book also gives tips on troubleshooting and describes each machine s historical origins as well as the science behind it with verve, fun, and quirky details. Workshop warriors and tinkerers at any skill level will love these new exciting DIY projects. ".