The Model 427 uses a main rotor pylon mounting system that provides good vibration isolation while being stiff vertically and compliant in pitch and roll. The design goal during the helicopter's development was to provide low vibrations yet allow the use of maintenance-free drive shaft couplings. Due to design and frequency placement constraints, LIVE (Fluidlastic) mounts were employed. This provided a pylon design that globally eliminated most of the main rotor 4/rev vibration (94% isolation of main rotor 4/rev vertical vibration). The residual airframe vibration is locally treated with a lightweight Frahm absorber in the crew area. A description is provided of the Model 427 pylon design including design challenges, the principles of a LIVE pylon isolation system, and actual flight test verification data.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Model 427 pylon isolation system


    Beteiligte:
    Smith, M.R. (Autor:in) / Redinger, W.S. (Autor:in)


    Erscheinungsdatum :

    1999


    Format / Umfang :

    7 Seiten, 2 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    PYLON MOUNTING SYSTEM WITH VIBRATION ISOLATION

    SMITH MICHAEL R / SPEARS STEVEN / STAMPS FRANK B et al. | Europäisches Patentamt | 2015

    Freier Zugriff

    Pylon

    JULIEN ALLAIN / STÈPHANE DIDA / JÈRÔME COLMAGRO et al. | Europäisches Patentamt | 2022

    Freier Zugriff

    Pylon Restraint System

    ROMANO PETER QUINN / GOODELL JEDEDIAH BRYCE / EMRICH JOSHUA ANDREW et al. | Europäisches Patentamt | 2023

    Freier Zugriff

    Pylon Restraint System

    ROMANO PETER QUINN / GOODELL JEDEDIAH BRYCE / EMRICH JOSHUA ANDREW et al. | Europäisches Patentamt | 2021

    Freier Zugriff

    Pylon

    Europäisches Patentamt | 2020

    Freier Zugriff