Boeing B-17 Flying Fortress

When it first took to the air the Boeing XB-15 was the biggest aircraft in the world, but it had already been superseded by the smaller but more efficient B-17 Flying Fortress.
The Boeing B-17 Flying Fortress is one of the most famous aircraft of the Second World War. It earned that fame with the Eighth Air Force, carrying out daylight bombing raids over Hitler’s Fortress Europe.
The B-17B was the last development version of the Flying Fortress. It was the first model of the aircraft to feature the distinctive flat-panelled Plexiglas nose that was used in early production aircraft and the first version to be produced in any numbers that used a turbo-supercharger
The B-17C was the first version of the Flying Fortress to be used in combat, as the RAF Fortress I. This experience began to suggest that the Flying Fortress was not combat ready in its current form and would lead to the development of the much more heavily armed B-17E.
The last 42 of the 80 aircraft originally ordered as B-17Cs were completed as B-17Ds. The new model featured self sealing fuel tanks, and carried two more machine guns.
The B-17E was the first version of the Flying Fortress to have the aircraft’s familiar appearance. It was designed after RAF Fortress Is had seen combat, revealing that the aircraft was badly under-armed for its role as a daylight bomber.
The B-17F was the first version of the Flying Fortress to be built in really large numbers, with a total of 3,405 aircraft being produced.
The B-17G was the final production version of the Flying Fortress and was produced in greater numbers than every other version put together.
The B-17 Flying Fortress first saw combat with the RAF, in the summer of 1941. Its initial performance as a day bomber was disappointing, but it remained in use with Coastal Command and with No.100 Group until the end of the war.