The use of strain gauge bridges for the derivation of aircraft manoeuvre loads is reviewed in the context of a recent load measuring flight trial on a British Aerospace TMk4a Harrier. Some of the pitfalls encountered in the method used for calibration of the gauges and their location are discussed. A comparison is made between the aircraft behaviour/load patterns expected at the design stage and the flight results obtained when these manoeuvers are flown on the aircraft. The applicability of these statutory aircraft design requirement type manoeuvers is explored by comparison with manoeuvres flown during Harrier development/operational flying where Flap, Thrust Vectoring and Reaction Control Power have been used to enhance the manoeuvre envelope. Here emphasis shifts from determining or confirming design load levels to ensuring that the known structure strength boundaries are observed. Conclusions are drawn as to the adequacy of present statutory design requirements. The need for accurate reliable calibrated load measurement in both the aircraft's development and operational stages is demonstrated.


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    Titel :

    Manoeuvers by Default, by Demand and by Design


    Beteiligte:
    E. J. Dalley (Autor:in) / C. D. Clarkson (Autor:in)

    Erscheinungsdatum :

    1988


    Format / Umfang :

    16 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




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