Boeing YB-40 Flying Fortress March 1944. All of the aircraft were sent to reclamation, mostly at RFC Ontario in May 1945, being broken up and smelted. (A couple of the YB-40s can be seen in the 1946 movie "The Best Years of Our Lives", in the famous scene shot at the Ontario "graveyard".) No airframes were sold on the civil market. Boeing YB-40 Flying Fortress The Boeing YB-40 Flying Fortress was a modification for operational testing purposes of the B-17 Flying Fortress bomber aircraft, converted to act as a heavily armed gunship for other bombers during World War II. At the time of its
76th Flying Training Wing (World War II) from single and two-engine aircraft to the B-17 or B-24 Liberator heavy bombers. Also after 1944, most pilots were learning on B-17/B-24s for eventual transition to B-29 Superfortress training under Second Air Force. As training requirements changed during the war, schools were activated and inactivated or transferred to meet those requirements. The schools of the wing flew primarily B-17D/E/F Flying Fortresses. Some B-17Gs were flown after June 1944 when Second Air Force B-17 training ended. Some B-24D Liberators were also used 76th Flying Training Wing (World War II) The 76th Flying Training Wing was a wing of the United States