Book excerpt: Convair Deltas: From SeaDart to Hustler tells the compelling story of America's aerospace industry in its heyday, when manufacturers boldly took the initiative to explore futuristic new designs by actually building and test flying airplanes to determine how well they would work, if at all. Convair led the way in this area with America's only complete family of delta-wing aircraft that included America's first delta-wing jet, the one-of-a-kind XF-92 experimental prototype, the XF2Y-1 jet-powered seaplane, the XFY-1 Pogo turboprop vertical takeoff and landing fighter, the F-102 Delta Dagger and F-106 Delta Dart supersonic missile-firing interceptors, and the revolutionary record-breaking four-engine B-58 Hustler - the world's first Mach 2 strategic bomber. Noted aviation author Bill Yenne thoroughly documents Convair's quest to conquer the aerodynamic mysteries of the delta wing with stories of the dramatic struggles and technological breakthroughs that gave the world some of its greatest fighter and bomber aircraft.