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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 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.
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 .
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 ...
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 ...
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.
The first YF-16 had its official maiden flight on 2 February 1974. The second YF-16 prototype first flew on 9 May 1974. This was followed by the first flights of the Northrop’s YF-17 prototypes, which were achieved on 9 June and 21 August 1974, respectively. The fly-off commenced in 1974 as both prototypes were delivered.
[3] [23] [24] All three survivors were seated at the back of the aircraft. [18] The crash was the deadliest aviation accident in Kenya since the crash of a Swearingen SA226-TC Metro II on Mount Kenya on 19 July 2003, killing all 14 occupants on board, [25] [26] [27] and was the first aviation accident involving government officials since the ...