An investigation was conducted in the Langley Transonic Dynamics Tunnel to evaluate differences between an existing utility-class main-rotor blade and an advanced-design main-rotor blade. The two rotor blade designs were compared with regard to rotor performance oscillatory pitch-link loads, and 4-per-rev vertical fixed-system loads. Tests were conducted in hover and over a range of simulated full-scale gross weights and density altitude conditions at advance ratios from 0.15 to 0.40. Results indicate that the advanced blade design offers performance improvements over the baseline blade in both hover and forward flight. Pitch-link oscillatory loads for the baseline rotor were more sensitive to the test conditions than those of the advanced rotor. The 4-per-rev vertical fixed-system load produced by the advanced blade was larger than that produced by the baseline blade at all test conditions.


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    Titel :

    Wind-Tunnel Evaluation of an Advanced Main-Rotor Blade Design for a Utility-Class Helicopter


    Beteiligte:
    W. T. Yeager (Autor:in) / W. R. Mantay (Autor:in) / M. L. Wilbur (Autor:in) / R. G. Cramer (Autor:in) / J. D. Singleton (Autor:in)

    Erscheinungsdatum :

    1987


    Format / Umfang :

    40 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Wind-Tunnel Evaluation of an Advanced Main-Rotor Blade Design for a Utility-Class Helicopter

    W. T. Yeager / W. R. Mantay / M. L. Wilbur et al. | NTIS | 1987


    Wind-tunnel evaluation of an advanced main-rotor blade design for a utility-class helicopter

    Yeager, William T., Jr. / Mantay, Wayne R. / Wilbur, Matthew L. et al. | NTRS | 1987


    Performance Data from a Wind-Tunnel Test of Two Main-rotor Blade Designs for a Utility-Class Helicopter

    Singleton, Jeffrey D. / Yeager, William T., Jr. / Wilbur, Matthew L. | NTRS | 1990



    Main rotor blade and helicopter

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