Results of an investigation, conducted on the Langley helicopter test tower, of a rotor having an NACA 632A015 airfoil thickness distribution in combination with an NACA 230 mean line are presented. Comparison with a previously reported test of a symmetrical rotor blade efficiency was substantially improved over a wide range of tip Mach numbers. The maximum mean lift coefficient was essentially unchanged from that obtained with uncambered blades. Some data showing the effect of a distributed type of leading-edge roughness are also included.


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    Titel :

    Hovering Characteristics of a Rotor having an Airfoil Section Designed for Flying-Crane Type of Helicopter


    Beteiligte:

    Erscheinungsdatum :

    1961-04-01


    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch