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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.
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 ...
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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]
The aircraft was not repaired, and was scrapped in situ. [51] On 3 January 2020, a Y-12-II of the Sri Lankan Air Force crashed to Haputale, Sri Lanka, while on aerial observations, killing all 4 airmen. [52] On 4 August 2020, a Y-12-II of the Kenyan Air Force resupplying AMISOM crashed after taking off from Dhobley Airstrip in Somalia. All 10 ...
Irwin was also a developmental test pilot for the Lockheed YF-12, the Mach 3 fighter-interceptor variant which preceded the SR-71 Blackbird. His first flight of that aircraft was on the day that one of his five children was born. [7] In 1961, a student pilot that Irwin was training crashed the plane they were flying on a training mission.
The aircraft was an Antonov AN-12B with the aircraft registration 11000 (factory number - 5343610, a serial number showing some basic information about the aircraft, 5 for the last digit of the year of manufacture - 1965, 34 for the factory of origin - the Tashkent aviation factory, 36 for the production batch and 10 for the individual aircraft within that batch [3] [4]) this aircraft left the ...