One of two X-31 Enhanced Fighter Maneuverability Demonstrator aircraft flown by an international test organization at NASA's Dryden Flight Research Center, Edwards, California.
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One of two X-31 Enhanced Fighter Maneuverability Demonstrator aircraft (top), flown by an international test organization at NASA’s Dryden Flight Research Center, Edwards, Calif., is seen here accompanied by a NASA F/A-18 chase aircraft during a research flight over the desert floor. The X-31 had a three-axis thrust-vectoring system, coupled with advanced flight controls, to allow it to maneuver tightly at very high angles of attack.1994NASA Photo / NASA› 1990s Fleet Description