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
B-17G "Flying Fortress" No. 44-83690 and in 1961, flown to Grissom Air Force Base (then known as Bunker Hill) for permanent display. The Heritage Museum Foundation, established in 1981 as part of the Air Force Museum Program, maintains 44-83690. In 2015 the aircraft was moved to the Museum of Aviation at Robins AFB, Georgia and is currently undergoing a lengthy restoration. B-17G "Flying Fortress" No. 44-83690 is a reasonably intact example of a World War II aircraft type of which only 50 exist in the world. It is also an example of an experimental craft, which participated, in military tests shortly after World War II.