15 Experimental Aircraft You’ve Never heard Of

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North American X-15

North American X-15

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Attaining a speed of Mach 6.72, this aircraft still holds the record as the fastest manned aircraft. It was developed in the 1960s and used for high altitude tests by both the US Air Force and NASA.

Grumman X-29

Grumman X-29

wikimedia.org

Although two of these forward swept winged aircraft were built for experimental purposes, one for the US Air Force and one for NASA, continued instability during flights resulted in no more being made.

Antonov A-40

Antonov A-40

wordpress.com

This aircraft was designed as a glider which could carry tanks to the battlefield having been towed aloft by a powered aircraft. Although a prototype was built and tested in 1942, it proved unacceptable.

Dornier Do 29

Dornier Do 29

free.fr

Although successful testing in the 1950s as a short takeoff and landing aircraft, its development was never continued.

Gasuden Koken

Gasuden Koken

wikimedia.org

This aircraft was built by the Japanese in the 1930s specifically for long range research. On its 3rd flight in 1937, it managed to set a long distance record which was later beaten in 1939 by an Italian aircraft.

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