Messerschmitt P-1101. World's first variable geometry wing.
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Messerschmitt Me P. 1101 1/72
The Messerschmitt P.1101 was a single-seat, single-jet fighter project of World War II, developed in response to the 15 July 1944 Emergency Fighter Program which sought a second generation of jet fighters for the Third Reich. A characteristic feature of the P.1101 prototype was that the sweep angle of the wings could be changed before flight, a feature further developed in later variable-sweep aircraft such as the Bell X-5 and Grumman XF10F Jaguar.