A full-size supercritical helicopter tail rotor drive shaft has been balanced using a quasi-static data acquisition technique. The method employs ultrasonic gaging equipment and a digital computer to determine the amount and location of the balance correction. In one 15-minute pass, the system has demonstrated the ability to locate the center of gravity (CG) of the shaft within 0.001 inch. The balanced shaft has run at speeds up to 10,500 rpm, including sustained operation at four critical speeds, with acceptable vibration at critical speeds. Operation at the design speed (between 2nd and 3rd critical speed) was well within standard high quality balance values.


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    Title :

    A Computerized Balancing Technique for Supercritical Helicopter Shafting


    Contributors:

    Publication date :

    1980


    Size :

    55 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




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