The design of the YF-107 was originally known as the F-100B while later referencing changed its designator to
"YF-107A". The YF-107A was a highly modified F-100 with an all new nose cone and dorsal spine-mounted intake. The nose cone was to house the needed fire control radar for precision weapons delivery while the unique positioning of the intake opening was simply due to the constraints of the existing F-100 layout. The YF-107 design retained the wings, rear fuselage, and tail section of its F-100 origins. The crew numbered one and standard proposed armament was to be 4 x M-39E internal cannons and up to 10,000 pounds of externally stores.
The aircraft competed unsuccessfully against others in a USAF tactical fighter design phase which was won out by the aircraft to become the Republic F-105 "Thunderchief". The three YF-107s completed were still utilized in a variety of air research and development tests to help further high-speed, high-level flying. The North American interceptor concept evolved some during the YF-108 "Rapier" program which was billed as a Mach 3-capable interceptor though this system was not adopted for service either.
Of the three YF-107s completed, one was scrapped during the 1960s while the remaining two ended their service lives as preserved museum showpieces - one at Pima Air and Space Museum of Tucson, Arizona and the other at the National Museum of the United States Air Force of Dayton, Ohio.
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