The B-17 was designed in 1934 by Boeing to take part in a US Army Air Corps competition to produce a modern multi-engined bomber. Their Model 299 prototype first flew on 28 July 1935, and a Journalist nicknamed it the ‘Flying Fortress’.
In October 1935, the prototype crashed and the design lost out to the Douglas DB-1. Fortunately, the Air Corps recognized it was a promising aircraft and ordered 13299s in January 1936, which they designated the Y1B-17. Not long after, the Y1B-17 became the B-17, and Wright Cyclone engines replaced the 299’s Pratt 8 Whitney Hornet engines. […]