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The SR-71 was the second operational aircraft [44], after the Lockheed A-12, [44], designed to be hard to spot on radar. Early studies in stealth technology indicated that a shape with flattened, tapering sides would reflect most radar energy away from a beam's place of origin, so Lockheed's engineers added chines and canted the vertical ...
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By the late 1980s, many aerospace industry observers believed that the U.S. had the technological capability to build a Mach 5 (hypersonic speed) replacement for the aging Lockheed SR-71 Blackbird. Detailed examinations of the U.S. defense budget claimed to have found money missing or channeled into black projects. [8]
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Clarence Leonard "Kelly" Johnson (February 27, 1910 – December 21, 1990) was an American aeronautical and systems engineer.He is recognized for his contributions to a series of important aircraft designs, most notably the Lockheed U-2 and SR-71 Blackbird.
As of December 2020, the only combat-ready stealth aircraft in service are the Northrop Grumman B-2 Spirit (1997), the Lockheed Martin F-22 Raptor (2005), the Lockheed Martin F-35 Lightning II (2015), [15] [16] the Chengdu J-20 (2017), [17] and the Sukhoi Su-57 (2020), [18] with a number of other countries developing their own designs. There ...
SR-71 Blackbird: Dec 22, 1964: USAF supersonic spyplane YO-3A Quiet Star: 1966: Reconnaissance LASA-60: Sep 15, 1959: Light Utility Sport Aircraft X-26B: Have Blue (XST) Dec 1977: stealth technology testbed F-117 Nighthawk: Jun 18, 1981: stealth attack aircraft Flatbed: 1980 s military transport aircraft project, cancelled P-7: 1980 s