Theoretical expressions are derived for the aerodynamic forces on a helicopter rotor, and for their contributions to various stability derivatives. The resulting expressions are tabulated, containing a number of functions of advance ratio which are presented graphically. Offset hinges and pitch-flap coupling are provided for in the formulation. A novel method for trim calculation is presented. The theory is based on the original results of Bailey (NACA TR 716, 1941). It involves some changes in notation, axes, assumptions, and the structure of formulas to widen their scope and improve their convenience for stability estimates. Discussion of the limiting assumptions is offered. (Author)


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    Title :

    Aerodynamic Characteristics of Helicopter Rotors. Rotor Contributions to Helicopter Stability Parameters


    Contributors:
    E. Seckel (author) / H. C. Curtiss (author)

    Publication date :

    1963


    Size :

    53 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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