52-2626 HB-ILY, C-97G Straotfreighter. The Boeing C-97 Stratofreighter was a long range heavy military cargo aircraft based on the B-29 bomber. Design work began in 1942, with the prototype's first flight in 1944, and the production aircraft entering service in 1947. Between 1947 and 1958, 888 C-97s in several variants were built - 816 of them KC-97 tankers. C-97s served in the Berlin Airlift, the Korean War, and the Vietnam War. Some aircraft served as flying command posts for the Strategic Air Command, while others were modified for use in Aerospace Rescue and Recovery Squadrons (ARRS).