The Lockheed SR71 "Blackbird" is a longrange, Mach 3+ strategic reconnaissance aircraft that was operated by the United States Air Force.[1] It was developed as a black project from the Lockheed A12 reconnaissance aircraft in the 1960s by Lockheed and its Skunk Works division. Renowned American aerospace engineer Clarence "Kelly" Johnson was responsible for many of the design's innovative concepts. During aerial reconnaissance missions, the SR71 operated at high speeds and altitudes to allow it to outrace threats. If a surfacetoair missile launch was detected, the standard evasive action was simply to accelerate and outfly the missile.[2] The SR71 was designed to have basic stealth characteristics and served as a precursor to future stealth aircraft.

Lockheed SR71 Blackbird
Strategic reconnaissance aircraft
The Lockheed SR71 "Blackbird" is a longrange, Mach 3+ strategic reconnaissance aircraft that was operated by the United States Air Force. Wikipedia
Top speed: 2,200 mph
Introduced: 1966
Retired: 1999
Length: 107'
Unit cost: 33,000,000–33,000,000 USD (1966)
Engine type: Pratt & Whitney J58
Designer: Kelly Johnson

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