The Space Shuttle body flap is located beneath the main engine nozzles and is required for proper aerodynamic control during orbital descent. Routine inspection of one of four body flap actuators found one of the actuator bearings had degraded and blackened balls. A test program was initiated to demonstrate that it is acceptable to operate bearings which are degraded from operation over several flights. This test exposed the bearing to predicted flight axial loads, speeds and temperatures. Testing at 140 F has been completed, and results indicate the previously flown bearings are acceptable for up to 12 additional missions. Additional testing is underway to determine the lubricant life at various temperatures and stresses and to further understand the mechanism that caused the blacken balls. Initial results of this testing indicates that bearing life is shorten at room temperature possibly due fact that higher temperature (140 F) accelerates the flow of grease and oil into the wear surface


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Space Shuttle Body Flap Actuator Bearing Testing for NASA Return to Flight


    Beteiligte:
    T. R. Jett (Autor:in) / R. E. Predmore (Autor:in) / M. J. Dube (Autor:in) / W. R. Jones (Autor:in)

    Erscheinungsdatum :

    2006


    Format / Umfang :

    5 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Space Shuttle Body Flap Actuator Bearing Testing for NASA Return to Flight

    Jett, Timothy R. / Predmore, Roamer E. / Dube, Michael J. et al. | NTRS | 2006


    Space Shuttle Body Flap Actuator Bearing Testing For NASA Return to Flight

    Jett, Timothy R. / Thom, Robert L. / Moore, Lewis E. et al. | NTRS | 2005


    NASA Research Center Contributions to Space Shuttle Return to Flight (SSRTF)

    Cockrell, Charles E., Jr. / Barnes, Robert S. / Belvin, Harry L. et al. | NTRS | 2005


    NASA Research Center Contributions to Space Shuttle Return to Flight (SSRTF)

    Cockrell, Charles / Barnes, Robert / Belvin, Harry et al. | AIAA | 2005


    Space Shuttle Program Return to Flight

    Parsons / Canaveral Council of Technical Societies | British Library Conference Proceedings | 2004