When it comes to Aviation, higher and faster is typically the name of the game, and one aircraft was trying to make its mark by flying faster than any rotor-wing aircraft at the time.

In 1962, the Lockheed Aircraft Company came out with the XH-51A, which was the second in a series of rotor-wing aircraft and was an evolution of the CL-475 aircraft, which utilized a revolutionary rigid-rotor system, according to Bob Mitchell, U.S. Army Aviation Museum curator.

Although the XH-51’s looks aren’t very striking, the helicopter was able to achieve speeds that few rotor-wing aircraft could attain – close to 300 knots – with average speeds of helicopters at the time reaching 80-90 knots, said Mitchell.

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United States Army Aviation Museum

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Photo By San Diego Air & Space Museum Archive [No restrictions, Public domain or Public domain], via Wikimedia Commons

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