Development History

The development of the B-17 began in the summer of 1934 using the specs given out by the army requesting a multiengined bomber. These specifications called for a bomber that was capable of carrying 2,002 pounds (907 kg) of ordanance and have a range from 1,025 (1,650 km) to 2,175 miles (3,500 km). This aircraft would also have to fly at speeds around 200 mph (320 km/h). When Boeing began designing their proposal for the aircraft they strayed from the nomal approach of the time to use four engines instead of the normal two. The aircraft made its first flight on July 28, 1935 and about a month later covered a distince of about 2,110 miles in nine hours without stopping.

After the design was complete and the B-17 was constructed it began its testing phase. These tests were so promising that it began production almost immidiatly. The first order cane in 1938 for 39 then in 1939 another 38 B-17Cs were ordered. The B-17Cs were givin more powerful engines and stronger armor.

In 1941 the B-17E was finished. This new model had the rear section of the fusaladge changed to increase stability and to supprot the addition of a rear machine gun mounted in the tail. Also another gun turret was placed on the belly as well as increased weapons. With the completion of the B-17E production increased drastically. 512 B-17s were eventuelly produced then later 3,400 B-17F's were produced. The B-17F had even more powerfull armament. The last model of the B-17 the B-17G was produced the most with a total of 8,685 aircraft. This final model had more defensive armament and the addition of another turret below the nose in the front of the aircraft. In all about 12,800 B-17s were built.