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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 ...
Myanmar Air Force Beechcraft 1900D 4610 crashes near Pyin Oo Lwin en route to Anisakan Airport from Naypyidaw, killing 12 of 16 on board. [ 85 ] [ 86 ] A Mexican Air Force MD Helicopters MD530F sustained substantial damage when it was involved in an accident near Santa Lucía Airport , Santa Lucía , Zumpango , Mexico .
A military fighter jet on its way to an Air Force base in California crashed Tuesday near the international airport in New Mexico's largest city, sending up a large plume of smoke and injuring the ...
The Pratt & Whitney J58 (company designation JT11D-20) is an American jet engine that powered the Lockheed A-12, and subsequently the YF-12 and the SR-71 aircraft. It was an afterburning turbojet engine with a unique compressor bleed to the afterburner that gave increased thrust at high speeds.
The U.S. military grounded its fleet of V-22 Osprey aircraft for months after the fatal crash, which happened during a routine training mission on Nov. 29 off Yakushima Island, about 1,040 km (650 ...
The YF-22 (and the Pratt & Whitney F119 engine) was declared the winner of the competition on 23 April 1991, and on 2 August 1991 both YF-22 prototypes were transferred to the Air Force. [2] Though the Number 1 YF-22 returned to the Lockheed Corporation plant to become a ground test bed for production designs, the Number 2 aircraft flew with ...
The longest continuing United States classified military airplane program is the testing and evaluation of Foreign Aircraft Technology. During the Cold War, secret test flying of Mikoyan-and-Gurevich Design Bureau (MiG) and other Soviet aircraft was an ongoing mission dating back to the acquisition of the first Soviet-built Yakovlev Yak-23 in 1953.