The most relevant fixed-price listing that has been used or worn previously.The item may have some signs of cosmetic wear, but is fully operational and functions as intended. This item may be a floor model or store return that has been used.See details for description of any imperfections.
A hands-on, how-to approach to building such fascinating devices as the high-voltage spud gun, the Jam Jar Jet and the Marshmallow Shooter. Also includes historical information on each invative machine as well as easy-to-follow assembly instructions and diagrams.
William Gurstelle is the author of Adventures from the Technology Underground, Backyard Ballistics, Building Bots, and The Art of the Catapult. The number of hours he s spent crafting fighting robots and catapults instead of working at, say, his normal job (as an engineer) is, in Bill s own words scary to contemplate, but it serves a purpose. When not building devices that make stuff go whoosh, boom, and splat, Bill is a contributing editor at Make magazine and writes frequently for Wired, The Rake, and several other national magazines. He lives in Minneapolis.