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Space Shuttle Orbiter Auxiliary Power Unit
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English
Abstract
The Space Shuttle Orbiter auxiliary power units (APUs) provide hydraulic power for the Orbiter vehicle control surfaces (rudder/speed brake, body flap, and elevon actuation systems), main engine gimbaling during ascent, landing gear deployment and steering and braking during landing. Operation occurs during launch/ascent, in-space exercise, reentry/descent, and landing/rollout.
Operational effectiveness of the APU is predicated on reliable, failure-free operation during each flight, mission life (reusability) and serviceability between flights (turnaround). Along with the accumulating flight data base, the status and results of efforts to achieve these long-run objectives is presented.
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Authors
Citation
McKenna, R., Wicklund, L., Baughman, J., and Weary, D., "Space Shuttle Orbiter Auxiliary Power Unit," SAE Technical Paper 820838, 1982, https://doi.org/10.4271/820838.Also In
References
- Space Shuttle Orbiter Auxiliary Power Unit Configuration and Performance Reck M. W. Sundstrand Corp. Baughman J. R. Rockwell International
- Tuthill W. C.