NASA Center Boosted YF-12 Supersonic Engine Research

NASA pilots flew this YF-12C aircraft from 1971 and 1978 to perform airspeed calibrations and collect propulsion system data at numerous flight conditions.Supersonic flight became a reality in October 1947, when the Bell X-1 rocket plane broke the sound barrier. NASA’s Lewis Research Center in Cleveland , which had served as the agency’s aeropropulsion leader since it was established in the 1940ssubsequently helped NASA advance the technology needed to make longer supersonic flights possible.

Bobby Sanders and Robert Coltrin check a full-scale YF-12 flight inlet prior to a February 1972 test run in the NASA Lewis Research Center 10×10 Supersonic Wind Tunnel. Although the 5-foot 9-inch diameter inlet was large for the test section, no problems aroseLewis’ researchers had studied supersonic inlets in wind tunnels since the early 1950s and were in the midst of an extensive evaluation of supersonic nozzles and inlets using an.

Researchers also studied the relationships between the airframe, inlet, engine, and control system during normal flight conditions and when experiencing realistic flow disturbances.

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