NASA 515, a Boeing 737 (manufactured 1968, serial number 19437) used by Langley Research Center for various research, including the 1975-1977 Microwave Landing System evaluation &amp; demonstration, 1975-1985 Velocity vector display development, 1976-1980 CRT electronic cockpit displays &amp; formats, 1983 Profile descent control law development, 1986 Total energy control law development, and 1989 Helmet mounted displays for precision manual landings. As of 1989, it was used for research in satellite-based Global Positioning System for autoland, ground-air data-link in lieu of voice communication, traffic flow management ATC-compatible 4-D Flight Management System development, and wind shear detection.
NASA/LRC
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