Boeing B-17C Flying Fortress tail number 105MD in flight the aircraft is assigned to Wright Field ca. 1941. November 21, 2017 at: 982 × 767 In: Overmatch: On Bullets, Bombers, and Taking the Right Path (Brief Thoughts 004) Next → A rare color photo of an early model B-17C in flight. In the late 1930s, the US Army Air Corps made the decision to proceed with the heavily armed “fortress” bomber concept, which resulted in great loss of life in World War II.