The emergency flotation system presently installed on the H-3 helicopter does not provide sufficient stability to ensure safe crew egress or shipboard recovery of the craft subsequent to water entry. A model of the H-3 helicopter has undergone static inclining experiments in calm water to determine restoring moments, dynamic experiments in calm water to determine damping and natural frequency characteristics, and dynamic experiments in random waves to evaluate maximum roll angles. Several configurations of emergency floats were installed during the experiments to compare their effectiveness in improving roll stability. Plots of maximum roll angle for operation in Sea States 2 to 5 are presented, as are tables containing maximum righting moments and damping factors. It is determined that newly configured 5,000 lb displacement floats improve roll stability significantly as compared to the floats presently installed on the helicopter. Keywords: Helicopter roll stability afloat; Emergency floats; Helicopter seaworthiness; Model experiments. (edc)


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Roll Characteristics of an H-3 Helicopter in Calm Water and Random Waves with Several Configurations of Emergency Floats Installed


    Beteiligte:
    A. Gersten (Autor:in)

    Erscheinungsdatum :

    1980


    Format / Umfang :

    60 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Development of Coated Fabrics for Emergency Floats of MI-8 Helicopter

    Husain, I. / Pal, A. / Paunikar, S. M. et al. | British Library Conference Proceedings | 1999


    Design Aspects of Structural Interfaces for Emergency Floats of MI-8 Helicopter

    Husain, I. / Pratap, M. / Jain, J. C. et al. | British Library Conference Proceedings | 1999


    Fabrication and Testing of Floats for Emergency Floatation System of MI-8 Helicopter

    Husain, I. / Thaper, K. K. / Pal, A. et al. | British Library Conference Proceedings | 1999


    Steering characteristics of ships in calm water and waves

    Eda, H. / Crane, Jr., C.L. | Engineering Index Backfile | 1965


    STUDY OF SHIP ROLL DECREMENT TESTS IN CALM WATER

    Valle, J. / Perez-Rojas, L. / Bulgaria Society of Naval Architects and Marine Engineers et al. | British Library Conference Proceedings | 1997