Boeing B-17E

The Boeing B-17E was initially developed for the United States Army Air Corps. Although the Air Corps made a contract with Douglas Aircraft Company, they still ordered 13 more of these prototypes from Boeing.

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After its introduction in 1938, the B-17’s design evolved to add more engineering developments and address many issues. For example, it was given larger rudders and flaps so it would have optimal performance even at slower speeds.