The development of an airborne 4 point contact moment load bearing, employing hollow ring sections is described. The E-3A (AWACS) Antenna Pedestal Turntable transfers the aerodynamic loads from, and provides rotation to the 30 ft. diameter rotodome, mounted on the Boeing E-3A (modified 707) airplane. As an aircraft structure, Boeing engineering support included material selection and stress, fatigue, failsafe and finite element analyses. Keystone Engineering followed a test and extrapolation approach. Turntable moment loads cause ring prying. The resulting ring distortions affect the bearing race geometry, and ball load distribution, hence bearing life. Rotation subjects the rings to fatigue. Concentrated load points affect the limit load race geometry. Bearing performance and stiffness are traded off against weight.


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    Title :

    E-3A antenna, pedestal turntable


    Additional title:

    Drehbares Traglager fuer die Radarantenne E-3A (AWACS)


    Contributors:
    Fritz, C.M. (author)


    Publication date :

    1977


    Size :

    9 Seiten, 19 Bilder


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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