Boeing B-17 Flying Fortress Boeing B-17 Flying Fortress The Boeing B-17 Flying Fortress is a four-engined heavy bomber developed in the 1930s for the United States Army Air Corps (USAAC). Competing against Douglas and Martin for a contract to build 200 bombers, the Boeing entry (prototype Model 299/XB-17) outperformed both competitors and exceeded the air corps' performance specifications. Although Boeing lost the contract (to the Douglas B-18 Bolo) because the prototype crashed, the air corps ordered 13 more B-17s for further evaluation. From its introduction in 1938, the B-17 Flying Fortress evolved through numerous design advances, becoming the third-most produced bomber of all time,
RAF Bomber Command aircrew of World War II recognized emergency landing place. Vigilance was always maintained as Luftwaffe night fighters flying as "night intruders" sometimes followed the bombers home and attacked as aircraft came into land. If the conditions were foggy, or particularly poor on their return it was not unusual for aircraft to be diverted to more distant bases which were clear. Arriving back at base crews were promptly ferried to de-briefing where mugs of tea were distributed while each crew was interviewed and a detailed operational report, compiled before a generous bacon and egg breakfast could be claimed. From the outbreak of war RAF Bomber Command