A shake test was conducted to determine the dynamic characteristics of a propeller test rig in the Ames 40- by 80-Foot Wind Tunnel. The rotor off hub transfer function (acceleration per unit force as a function of frequency) was measured in the longitudinal, lateral, and vertical directions for shaft angles of 0 and 90 deg corresponding to propeller and helicopter operation, respectively. The dynamic data are summarized for the configurations tested, giving the following properties for each mode identified: the natural frequency, the hub response at resonance, the damping coefficient, the damping ratio, and the modal mass. The complete transfer functions are presented, and the detailed test results are included. (Author)


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    Title :

    Shake Test of a Propeller Test Rig in the 40- by 80-Foot Wind Tunnel


    Contributors:
    W. Johnson (author)

    Publication date :

    1975


    Size :

    24 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





    Wind tunnel test apparatus for propeller

    CHO TAE HWAN / KIM YANG WON | European Patent Office | 2018

    Free access

    Wind tunnel test apparatus for propeller

    European Patent Office | 2018

    Free access

    Wind tunnel test apparatus for propeller

    European Patent Office | 2018

    Free access

    Wind tunnel test apparatus for propeller

    CHO TAE HWAN / KIM YANG WON | European Patent Office | 2018

    Free access