Tags: Aircraft.

The Lockheed YF-12 was an American prototype interceptor aircraft evaluated by the United States Air Force. The YF-12 was 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. The YF-12 set and held speed and altitude world records of over 2000 mph and over 80000 ft (later surpassed by the SR-71) and is the world’s largest manned interceptor to date.

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