Editing Boeing B-47 Stratojet (section)

===X-model competitions===
By mid-1948, the USAF's bomber competition had already been through one iteration, pitting the North American XB-45 against the Convair XB-46. The North American design won that round of the competition. As an interim measure, the USAF decided to put the North American bomber into production on a limited basis as the B-45 Tornado. The expectation was that B-45 production would be terminated if either of the remaining two designs in the competition, the Boeing XB-47 and the Martin XB-48, proved superior. It is sometimes claimed that the final production decision was made as a result of Boeing president [[William McPherson Allen|Bill Allen]] inviting USAF General K.B. Wolfe, in charge of bomber production, for a ride in the XB-47.<ref name="Yenne p160">Yenne 2002, p. 160.</ref> A formal contract for 10 aircraft was signed on 3 September 1948.<ref name="Knaack p107">Knaack 1988, p. 107.</ref><ref name = "gungil 4344">Gunston and Gilchrist 1993, pp. 43–44.</ref>