An analysis is presented of the normal accelerations and operating conditions encountered by two different airmail helicopters and a military pilot-training helicopter. The results, based on 4,325 flights (618 hours of flying time), indicate that maneuvers are usually responsible for the relatively large accelerations encountered, whereas gusts contribute primarily to the large number of smaller accelerations and the corresponding increase in the amount of time spent in the accelerated state. The largest maneuver loads recorded to date are increments (measured from the 1 g normal-flight condition) of 1.40g and -1.25g, whereas the largest gust-acceleration increment was 0.90g. The percentages of total flight time spent in the various flight conditions and speed ranges, as well as the acceleration time histories, are very similar for the two airmail helicopters and appear to follow a definite pattern as contrasted to the varied operating conditions of the military pilot-training helicopter.


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    Titel :

    A Study of Normal Accelerations and Operating Conditions Experienced by Helicopters in Commercial and Military Operations


    Beteiligte:
    Marlin E Hazen (Autor:in)

    Erscheinungsdatum :

    1955-04-01


    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch