Visionary designer Jack Northrop built a series of experimental "flying wing" aircraft both before and during WWII. One of the most radical designs of the post-war era, the propeller-driven YB-35 bomber's all-wing design minimized drag and promised maximum payload capacity and terrific endurance. The YB-49, a turbojet powered variant built on the YB-35 airframe, forever altered aviation history and inspired the design of the B-2 Spirit stealth bomber. Originally printed by Northrop Aircraft in 1948, the YB-49 Flying Wing Pilot's Flight Operating Manual taught pilots everything they needed to...