The techniques used in the study of main and tail rotor aerodynamics by measurements on full-scale helicopters in flight are described. The strengths and weaknesses of flight research are discussed and some comparisons with wind tunnel techniques are drawn. The application of various types of sensors is discussed together with a more general discussion on data acquisition, recording, and processing. Airworthiness aspects including fatigue damage monitoring are also considered. Examples which illustrate the various techniques and provide informative comparisons with theory are presented. The use of comparative techniques in which opposite blades in a single rotor are individually modified and the use of indicator sensors to supplement or replace complete chordwise pressure distributions are highlighted.


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    Title :

    Experimental Techniques in Helicopter Aerodynamics Flight Research


    Contributors:

    Publication date :

    1990


    Size :

    25 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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