An experimental investigation was performed to determine the low-speed aerodynamic performance characteristics of the trailed-rotor high-speed rotorcraft concept in its cruise configuration. A 15 percent scale semispan model was tested at speeds up to 180 knots in the NASA Ames 7-by 10-Foot Subsonic Wind Tunnel. The objective of this investigation was to determine specific aerodynamic performance characteristics to assist in evaluating the trailed rotor as a high-speed rotorcraft. The aerodynamic influence of the following model configuration changes were determined: ailerons, flaps, wing/pod angle, number of trailed blades, trailed-blade twist and azimuth, and wing/pod filet radius. The low-speed performance objectives for the concept were met and results indicated that the trailed-rotor model had no significant adverse aerodynamic characteristics. The optimum low-speed cruise configuration was determined. Results suggest the trailed-rotor concept has better low-speed cruise performance characteristics than the folding tiltrotor configuration.


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    Titel :

    Low-speed aerodynamics of the trailed-rotor high-speed rotorcraft concept in cruise configuration


    Beteiligte:
    Johnson, Jeffrey L. (Autor:in) / Swanson, Stephen M. (Autor:in) / Sambell, Ken W. (Autor:in) / Sundar, Ray (Autor:in) / Cowles, Lisa (Autor:in)

    Erscheinungsdatum :

    1991-09-01


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Keine Angabe


    Sprache :

    Englisch


    Schlagwörter :



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