This report presents an assessment of composite helicopter tail rotor spars and horizontal stabilizers, exposed to the effects of the environment, after up to five and a half years of commercial service. This evaluation is supported by test results of helicopter components and panels which have been exposed to outdoor environmental effects since September 1979. Full scale static and fatigue tests have been conducted on graphite/epoxy and Kevlar/epoxy composite components obtained from Sikorsky Model S-76 helicopters in commercial operations in the Gulf Coast region of Louisiana. Small scale static and fatigue tests are being conducted on coupons obtained from panels under exposure to outdoor conditions in Stratford, Connecticut and West Palm, Florida. The panel layups are representative of the S-76 components. Additionally, this report discusses the results of moisture absorption evaluations and strength tests on the S-76 components and composite panels with up to five years of outdoor exposure.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Flight service evaluation of composite helicopter components


    Contributors:

    Publication date :

    1986-09-01


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    Flight service evaluation of composite helicopter components

    Mardoian, George H. / Ezzo, Maureen B. | NTRS | 1994



    Flight Service Evaluation of Composite Helicopter Components

    G. H. Mardoian / M. B. Ezzo | NTIS | 1990


    Flight service evaluation of composite helicopter components

    Mardoian, G.H. / Ezzo, M.B. | Tema Archive | 1994


    Flight service evaluation of composite helicopter components

    Mardoian, George H. / Ezzo, Maureen B. | NTRS | 1990