EC87-0050-001 One of the most unusual experimental flight vehicles appearing at NASA's Ames-Dryden Flight Research Facility later redesignated Dryden Flight Research Center in the 1980s was the Rotor Systems Research Aircraft RSRA X-Wing aircraft, seen here on the ramp. The craft was developed originally and then modified by Sikorsky Aircraft for a joint NASA-Defense Advanced Research Projects Agency DARPA program and was rolled out 19 August 1986. Taxi tests and initial low-altitude flight tests without the main rotor attached were carried out at Dryden before the program was terminated in 1988. February 1987 NASA Photo / Tammy Gill
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