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X-3 Stiletto experimental aircraft. Historical image of the Douglas X-3 Stiletto. This experimental jet aircraft was built in 1952 for the US Air Force. It featured a narrow fuselage, tiny wings and a long tapered nose making it the sleekest aircraft for its time. The X-3 performed poorly in test flights and never attained its target speed of Mach 2 (twice the speed of sound). Despite this, several features were taken forward to use in future high speed planes. Photographed at Edwards Air Force Base, California, USA, in April 1954.
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