Editing Lockheed XF-90 (section)

{{Short description|Experimental aircraft}}
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{{Infobox aircraft
| name = XF-90
| image = File:XF-90 inflight USAFM.jpg
| caption = XF-90 in flight
| type = Fighter
| manufacturer = [[Lockheed Corporation|Lockheed]]
| designer = <!--Only appropriate for single designers, not project leaders-->
| first_flight = 3 June 1949
| introduction = 
| retired = 
| status = Canceled
| primary_user = [[United States Air Force]] (Intended)
| more_users = 
| produced = 
| number_built = 2
| unit cost = US$5.1 million for the program<ref name="knaack">Knaack 1978, p. 325.</ref>
| variants = 
}}

The '''Lockheed XF-90''' was built in response to a [[United States Air Force]] requirement for a long-range [[penetration fighter]] and [[escort fighter|bomber escort]]. The same requirement produced the [[McDonnell]] [[XF-88 Voodoo]]. Lockheed received a contract for two prototype '''XP-90'''s (redesignated '''XF-90''' in 1948). The design was developed by [[Willis Hawkins]] and the [[Skunk Works]] team under [[Clarence Johnson|Kelly Johnson]]. Two prototypes were built ([[United States military aircraft serials|s/n]] ''46-687'' and ''-688''). Developmental and political difficulties delayed the first flight until 3 June 1949, with Chief Test Pilot [[Tony LeVier]] at the controls. Embodying the experience gained in developing the [[P-80 Shooting Star]], the XF-90 shared some design traits with the older Lockheed fighter, albeit with [[swept wing|swept-wings]]; however, this latter design choice could not sufficiently make up for the project’s underpowered engines,<ref name="Jones p. 241">Jones 1975, p. 241.</ref> and the XF-90 never entered production.