In a limited evaluation to assess degraded hydraulic system collective control limiting of the AH-1S(MC) helicopter equipped with K747 main rotor blades, conducted by the US Army Aviation Engineering Flight Activity (USAAEFA). Testing was conducted at Edwards Air Force Base, California between 5 October and 14 October 1985. Twelve flights were flown totalling 9.5 hours, of which 7.9 hours were productive. One deficiency was identified: the collective control limiting after a hydraulic system failure which if experienced in an out-of-ground effect hover may result in a mishap. Collective control limiting occurred when the minimum value of the collective actuator load reached 1050 + or - pounds. The maintenance test flight (MTF) procedure which was evaluated was unsatisfactory. A recommended MTF procedure, developed during this test, is included.


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    Piloted Evaluation of Degraded-Mode Handling Qualities

    Mitchell, David / Mason, David / Weakley, Jerry et al. | AIAA | 2004


    AIAA-2004-4704 Piloted Evaluation of Degraded-Mode Handling Qualities

    Mitchell, D. / Mason, D. / Weakley, J. et al. | British Library Conference Proceedings | 2004



    Hydraulics

    Emerald Group Publishing | 1974


    Hydraulics

    Emerald Group Publishing | 1974