The first X-29 flew for the first time on 14 December 1984 from Edwards AFB piloted by Grumman's Chief Test Pilot Chuck Sewell. The X-29 was the third forward-swept wing jet-powered aircraft design to fly; the other two were the Nazi Germany Junkers Ju 287 (1944 and post-war by the USSR) and the HFB-320 Hansa Jet (1964). On 13 December 1985, a X-29 became the first forward-swept wing aircraft to fly at supersonic speed in level flight.
The NASA Dryden Flight Research Center reported that the X-29 demonstrated a number of new technologies and techniques, and new uses of existing technologies, including the use of "aeroelastic tailoring to control structural divergence", aircraft control and handling during extreme instability, three-surface longitudinal control, a "double-hinged trailing-edge flaperon at supersonic speeds", effective high angle of attack control, vortex control, and demonstration of military utility.
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YouTube-Link : Grumman X-29A - 1/72