Higher Harmonic Control reduces helicopter airframe vibration through the exercise of rotor blade pitch control at frequencies that are higher harmonics of rotor rotation. Analysis wind tunnel tests and flight tests of this technology with an OH-6A helicopter have led to vibration reduction levels of the order of more than 80 percent. Blade feathering capability at rotor speed harmonics other than the first also promises the improvement of such rotor characteristics as acoustics, aerodynamic efficiency and ground resonance.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Higher harmonic control for rotary wing aircraft


    Contributors:
    Gupta, B. P. (author) / Logan, A. H. (author) / Wood, E. R. (author)

    Publication date :

    1984-10-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




    Higher harmonic control for rotary wing aircraft

    GUPTA, B. / LOGAN, A. / WOOD, E. | AIAA | 1984


    Harmonic data transfer in rotary wing aircraft

    SANE HARSHAD S / MATALANIS CLAUDE G / GEIGER DEREK et al. | European Patent Office | 2015

    Free access

    Harmonic data transfer in rotary wing aircraft

    SANE HARSHAD S / MATALANIS CLAUDE G / GEIGER DEREK et al. | European Patent Office | 2019

    Free access


    Rotary wing of fixed-wing aircraft and aircraft with rotary wing

    CHEN MINGJUN / HE LIJUN / PENG JIANPING et al. | European Patent Office | 2024

    Free access