An overview of the United States Space Shuttle Orbiter APU, which provides power to the Orbiter vehicle hydraulic system, is presented. Three complete APU systems, each with its own separate fuel system, supply power to three dedicated hydraulic systems. These in turn provide power to all Orbiter vehicle critical flight functions including launch, orbit, reentry, and landing. The basic APU logic diagram is presented. The APU includes a hydrazine-powered turbine that drives a hydraulic pump and various accessories through a high-speed gearbox. The APU also features a sophisticated thermal management system designed to ensure safe and reliable operation in the various launch, orbit, reentry, and landing environments.


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    Title :

    Space Shuttle Orbiter auxiliary power unit status


    Contributors:
    Reck, M. (author) / Loken, G. (author) / Horton, J. (author) / Lukens, W. (author) / Scott, W. (author) / Baughman, J. (author) / Bauch, T. (author)

    Conference:

    International Pacific Air and Space Technology Conference ; 1991 ; Gifu, Japan


    Publication date :

    1991-01-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




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