New Surplus B-17 Flying Fortress Tail Wheel p/n 25272. Found in an inventory we purchased these are for the B-17 Flying Fortress Tail Wheel. The Boeing B-17 Flying Fortress is a four-engine heavy bomber developed in the 1930s for the United States Army Air Corps. First flight for the B-17 was on July 28th, 1935 and was in use by many different countries until 1968 when the Brazilian Air Force retired its last one. This wheel is a very unique item as you do not see many B-17 parts for sale.