Adventures from the Technology Underground : Catapults, Pulsejets, Rail Guns, Flamethrowers, Tesla Coils, Air Cannons, and the Garage Warriors Who Love

A journey into world of underground technology enthusiasts--and their labs, workshops, and gatherings--introduces the amateur inventors, science fanatics, and technophiles dedicated to creating a wide variety of unusual machines, with little regard for profit, government regulations, or their own physical well-being. Reprint. 30,000 first printing.