The program was conducted to investigate the effects of a loss of power on a single rotor helicopter at high speeds. A normal mode flexible blade analysis was combined with generalized helicopter equations of motion on a hybrid computer to predict the effects of rotor design variables and corrective control inputs on the transient response of a helicopter following a loss of main rotor power. At high forward speeds (200 to 235 knots) a loss of power can seriously affect the safety of single rotor helicopters unless there is a rapid and appropriate application of main rotor and tail rotor control. Rotor propulsive force, hinge offset, and rotor blade inertia were found to be important design considerations which effect helicopter and blade motion and loading following a loss of power. The aircraft response is due primarily to the fuselage aerodynamic characteristics associated with the sideslip and yaw motion generated by the unbalanced tail rotor yawing moment. The loss of power is less critical when a partial loss of power occurs or for a reduced rotor propulsive force. (Author)


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Single Rotor Helicopter Dynamics Following Power Failure at High Speed


    Beteiligte:
    D. E. Cooper (Autor:in) / C. Hansen (Autor:in) / T. T. Kaplita (Autor:in)

    Erscheinungsdatum :

    1966


    Format / Umfang :

    2 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    SINGLE-ROTOR HIGH-SPEED HELICOPTER

    MARYUSHIN ANATOLIJ VIKTOROVICH / SHVEDOVA SVETLANA YUREVNA | Europäisches Patentamt | 2022

    Freier Zugriff

    High speed helicopter rotor design

    Drees, J.M. | Engineering Index Backfile | 1963


    Helicopter rotor tail rotor failure protection system and helicopter

    CHEN XI / GAO XUAN / FEI ZHONGYANG et al. | Europäisches Patentamt | 2023

    Freier Zugriff

    VARIABLE-ROTATING-SPEED ROTOR BLADE, COAXIAL UNMANNED HELICOPTER, AND SINGLE-ROTOR UNMANNED HELICOPTER

    WANG YULIN / LI DONGDA / DONG BIN | Europäisches Patentamt | 2024

    Freier Zugriff

    Designing high-speed rigid rotor helicopter

    Culver, I.H. | Engineering Index Backfile | 1963