Space Shuttle Orbiter Auxiliary Power Unit
820838
02/01/1982
- Event
- Content
- 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.
- Pages
- 12
- 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.