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Vertical takeoff aircraft

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• Conceptual design study of 1985 commercial tilt rotor transports. (Washington, D.C. : National Aeronautics and Space Administration ; Springfield, Va. : For sale by the National Technical Information Service [distributor], 1975), by J. A. DeTore, K. W. Sambell, and Bell Helicopter Company (page images at HathiTrust)
• LF336 lift fan modification and acoustic test program / (Washington, D.C. : National Aeronautics and Space Administration ; Springfield, Va. : For sale by the National Technical Information Service [distributor], 1971), by S. B. Kazin, L. J. Volk, Ames Research Center, and General Electric Company (page images at HathiTrust)
• Wind-tunnel and piloted flight simulator investigation of a deflected-slipstream VTOL airplane, the Ryan VZ-3RY / (Washington, [D.C.] : National Aeronautics and Space Administration, 1959), by Harry A. James and Ames Research Center (page images at HathiTrust)
• Aerodynamic characteristics of a powered semispan tilting-shrouded-propeller VTOL model in hovering and transition flight / (Washington [D.C.] : National Aeronautics and Space Administration, 1962), by Kenneth W. Goodson, Kalman J. Grunwald, United States National Aeronautics and Space Administration, and Langley Research Center (page images at HathiTrust)
• Low-speed wind-tunnel investigation of a wingless jet VTOL transport model / (Washington, [D.C.] : National Aeronautics and Space Administration, 1959), by Marion O. McKinney and Langley Research Center (page images at HathiTrust)
• An investigation to determine conditions under which downwash from VTOL aircraft will start surface erosion from various types of terrain / (Washington, [D.C.] : National Aeronautics and Space Administration, 1959), by Richard E. Kuhn and Langley Research Center (page images at HathiTrust)
• An evaluation of linearized vortex theory as applied to single and multiple rotors hovering in and out of ground effect / (Washington, [D.C.] : National Aeronautics and Space Administration, 1959), by Harry H. Heyson and Langley Research Center (page images at HathiTrust)
• Force-test investigation of the stability and control characteristics of a 1/8-scale model of a tilt-wing Vertical-Take-Off-and-Landing (VTOL) airplane / (Washington, [D.C.] : National Aeronautics and Space Administration, 1960), by Louis P. Tosti and Langley Research Center (page images at HathiTrust)
• Wind-tunnel tests of a semispan wing with a fan rotating in the plane of the wing / (Washington, [D.C.] : National Aeronautics and Space Administration, 1959), by David H. Hickey, David R. Ellis, and Ames Research Center (page images at HathiTrust)
• Wind-tunnel investigation of effect of ratio of wing chord to propeller diameter with addition of slats on the aerodynamic characteristics of tilt-wing VTOL configurations in the transition speed range / (Washington, [D.C.] : National Aeronautics and Space Administration, 1959), by Robert T. Taylor, United States National Aeronautics and Space Administration, and Langley Research Center (page images at HathiTrust)

Items below (if any) are from related and broader terms.