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Spur Gear Wear Investigated in Support of Space Shuttle Return-To-Flight EffortsAs part of NASA s Return-To-Flight efforts, the Space Operations Program investigated the condition of actuators for the orbiter s rudder speed brake. The actuators control the position of the rudder panels located in the tail of the orbiter, providing both steering control and braking during reentry, approach, and landing. Inspections of flight hardware revealed fretting and wear damage to the critical working surfaces of the actuator gears. To best understand the root cause of the observed damage and to help establish an appropriate reuse and maintenance plan for these safety critical parts, researchers completed a set of gear wear experiments at the NASA Glenn Research Center.
Document ID
Acquisition Source
Glenn Research Center
Document Type
Krantz, Timothy L.
(Army Research Lab. Cleveland, OH, United States)
Oswald, Fred B.
(NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
September 7, 2013
Publication Date
June 1, 2005
Publication Information
Publication: Research and Technology 2004
Subject Category
Spacecraft Design, Testing And Performance
Distribution Limits
Work of the US Gov. Public Use Permitted.
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