Now completely revised and expanded, with new models, new full-color graphics, and new know-how, this is the irresistible bestseller that marries the fun of making paper airplanes with the hard science of aeronautical engineering. The result? The perfect collection for novice and frequent flier alike. It features: a hangar's worth of different designs, from the basic dart to a biplane, autogyro, and the famous World Record Paper Airplane; 112 ready-to-fold airplanes with attention-grabbing full-color graphics; an improved and expanded primer on the principles of flight, including weight vs. lift, drag vs. thrust, and adjustments for greater stability; Everything you need to know about the all-important throw —how to match throwing technique with the right model; aerobatics; how to perform circles, loops, dives, and other stunts; how to organize (and win! ) paper airplane contests; *plus a flight log and pull-out runway*.