This report summarizes the flight test results of the Phase III four-bladed rotor testing on the XH-51A 'rigid rotor' helicopter. The object of Phase III was to evaluate the four-blade rotor in comparison with the three-blade rotor. Ground tests commenced on 13 July 1964 with the first flight on 21 July 1964. The phase was terminated on 3 October 1964 after 49 flights and 14.9 flight hours. (Author)


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    Title :

    Preliminary Flight Test Data. Xh-51A Rigid Rotor High Speed Flight Program


    Publication date :

    1964


    Size :

    36 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English