Boeing B-17
The Boeing B-17 was developed for a 1934 US Army Air Corps proposal requesting a multiengine bomber to replace the earlier B-10. The first prototype flew in 1935, where it was christened the "Flying Fortress," after a reporter commented on the number of guns bristling from its fuselage. Boeing often advertised the strategic bomber on its merits as a four engine aircraft, claiming it could complete its missions even after losing an engine. The B-17 starred chiefly in daylight raids for the Allied strategic bombing campaign, dropping over 640,000 tons of bombs on Nazi Germany and occupied territories. Across all variants between initial production and the end of the war, 12,731 B-17s were produced. The initial run of the B-17 was rocky. The first prototype went up in flames during an altitude test shortly after takeoff, costing the lives of both test pilots. Modern written takeoff checklists are a direct result of this event. Sin...