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Simulation of Space Shuttle Gear Performance

[+] Author Affiliations
S. H. Kratz, L. D. Wedeven, W. F. Black, D. J. Carlisle, G. G. Wedeven

Wedeven Associates, Inc., Edgmont, PA

Paper No. WTC2005-64297, pp. 897-898; 2 pages
  • World Tribology Congress III
  • World Tribology Congress III, Volume 1
  • Washington, D.C., USA, September 12–16, 2005
  • Conference Sponsors: Tribology Division
  • ISBN: 0-7918-4201-0 | eISBN: 0-7918-3767-X
  • Copyright © 2005 by ASME


Scuffing damage was found on Space Shuttle Power Drive Unit gears for the Rudder Speed Brake. Scuffing simulation tests rule out a predicted scuffing scenario. Scuff initiation is caused by tooth interference under unique transient high speed and torque conditions. Simulation tests for subsequent operation following a scuffing event show limited wear much less than the thickness of the gear case hardened layer.

Copyright © 2005 by ASME
Topics: Simulation , Gears



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