Lockheed YF‑12
The YF-12C was operated by NASA until September 1978, when it was returned to the Air Force.The YF-12 had a real-field sonic-boom overpressure value between 33.5 to 52.7 N/mJohnson's speech named the plane A-11, the name for the two-seat design. No. However, the F-108 program was canceled by the Department of Defense in September 1959. 60-6934 was damaged beyond repair by fire at Edwards AFB during a landing mishap on 14 August 1966; its rear half was salvaged and combined with the front half of a Lockheed static test airframe to create the only YF-12A, AF Ser. In the late 1950s the United States Air Force (USAF) sought a replacement for its F-106 Delta Dart interceptor. However, the remaining aircraft remained in service NASA until their final expulsion in 1979. No. The Lockheed YF-12 was an American prototype interceptor aircraft evaluated by the United States Air Force. The YF-12 "Blackbird" was an experimental fighter-interceptor version of the Lockheed A-12 reconnaissance aircraft. In the late 1950s, the United States Air Force (USAF) sought a replacement for its F-106 Delta Dart interceptor. The YF-12 was a twin-seat version of the secret single-seat Lockheed A-12 reconnaissance aircraft, which led to the U.S. Air Force's Lockheed SR-71 Blackbird twin-seat reconnaissance variant. One of the biggest problems that engineers faced at that time was working with Before the A-12, titanium was used only in high-temperature exhaust fairings and other small parts directly related to supporting, cooling, or shaping high-temperature areas on aircraft like those subject to the greatest With the move to the A-12, another improvement in RCS was made by replacing the fillets with new radar-absorbing After development and production at the Skunk Works, in The first five A-12s, in 1962, were initially flown with Collins safely ejected and was wearing a standard flight suit, avoiding unwanted questions from the truck driver who picked him up. 61–7951). However, the remaining aircraft remained in service NASA until their final expulsion in 1979. The YF-12 was capable of Mach 3 and above, it set 9 world records for speed and altitude in a single afternoon (later surpassed by the SR-71), and it was used as a cover for the top secret, CIA funded A-12 reconnaissance aircraft. Scattered clouds covered 20 percent of the area, concealing the area in which the USS Even before the A-12 became operational, its intended purpose of replacing the U-2 in overflights of the Soviet Union had become less likely. The A-11 was competing against a Because the A-12 was well ahead of its time, many new technologies had to be invented specifically for the Oxcart project with some remaining in use in present day. 60-6931 ("Article 128") was unveiled on Wednesday, 19 September 2007, at CIA Headquarters in Langley, Virginia. Both a primary aircraft and pilot and a back-up aircraft and pilot were selected. The Lockheed YF-12 Interceptor was the aircraft that would go on to become the SR-71 Blackbird – one of the most famous of all the Skunk Works projects. After the XF-108 was cancelled due to financial problems, Lockheed was able to interest the Air Force in a Mach 3 Interceptor, based on the A-12. 60-6936 was lost on 24 June 1971 due to an in-flight fire caused by a failed fuel line; both pilots ejected safely just north of Edwards AFB. In case of emergency, the variant was designed to allow the flight instructor to take control. As part of the Long Range Interceptor Experimental (LRI-X) program, the North American XF-108 Rapier, an interceptor with Mach 3 speed, was selected. Lockheed YF-12A 60-6934 in Air Defense Command markings 1963. Looking through his rear-view periscope, Sullivan saw six missile contrails climb to about 90,000 ft (27,000 m) before converging on his aircraft. All surviving aircraft remained there for nearly 20 years before being sent to museums around the U.S. On 20 January 2007, despite protests by Minnesota's legislature and volunteers who had maintained it in display condition, the A-12 preserved in Minneapolis, Minnesota, was sent to CIA headquarters to be displayed there.Major events in the development and operation of the A-12 and its successor, the SR-71, include:
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