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A fourth YF-12 aircraft, the "YF-12C", was actually the second SR-71A (AF Ser. No. 61–7951). This SR-71A was re-designated as a YF-12C and given the fictitious Air Force Serial Number 60-6937 from an A-12 to maintain SR-71 secrecy. The aircraft was loaned to NASA for propulsion testing after the loss of YF-12A (AF Ser. No. 60–6936) in 1971.
The YF-12 program was a limited production variant of the A-12. Lockheed convinced the U.S. Air Force that an aircraft based on the A-12 would provide a less costly alternative to the recently canceled North American Aviation XF-108, since much of the design and development work on the YF-12 had already been done and paid for. Thus, in 1960 the ...
Designations YF-117 and YF-118 were black projects, with the F-117 designation later becoming the official Tri-Service designation of the production variant of the former. These designations chronologically continued the pre-1962 "F" series. [9] [10] YF-24 – mentioned in a USAF test pilot's official biography, possibly classified [9] [11]
Before the test "Snoopy" could fly, the XF-108 program was cancelled, and the proposed Lockheed YF-12 interceptor was to instead receive the radar/missile system pair. Tests of the system were conducted first in 1960 and until 1963 only on the modified B-58, after which the YF-12 took over until the cancellation of the whole program in 1966. [1]
Lockheed YF-94 (S/N 48-373). This was the second aircraft built (from TF-80C) On 16 April 1949, the first YF-94 prototype performed its maiden flight. [6] To accelerate development, these early test aircraft were converted from existing T-33s; they maintained roughly 75% commonality in terms of components with those used in the earlier F-80 and T-33As.
Douglas A-26C Invader 44-35733 [96]; Douglas C-124C Globemaster II 52-1066 [97]; Lockheed F-80C Shooting Star 49-696 [98]; Lockheed F-94A Starfire 49-2498 [99]; Mikoyan-Gurevich MiG-15bis 2015357 – Soviet fighter of the Korean People's Air Force defected to Seoul, later flown by Chuck Yeager [100]
Designated as part of series continuing from the pre-1962 system and latterly used to identify foreign aircraft acquired by the government, [26] e.g., YF-113 was a MiG-23. [27] Additionally, the basic mission designation as fighter implies air-to-air capabilities though the F-117 does not possess any.
This is a list of aircraft produced or proposed by the Lockheed Aircraft Corporation from its founding as the Lockheed Aircraft Company in 1926 to its merging with Martin Marietta to form the Lockheed Martin Corporation in 1995. Ordered by model number, Lockheed gave most of its aircraft astronomical names, from the first Vega to the C-5 Galaxy.