Electric auxiliary power unit for Shuttle evolutionThe Space Shuttle Orbiter currently uses three hydrazine fueled auxiliary power units (APUs) to provide hydraulic power for the vehicle aerodynamic surface controls, main engine thrust vector control, landing gear, steering, and brakes. Electric auxiliary power units have been proposed as possible replacements to the hydrazine auxiliary power units. Along with the potential advantages, this paper describes an Electric APU configuration and addresses the technical issues and risks associated with the subsystem components. Additionally, characteristics of an Electric APU compared to the existing APU and the direction of future study with respect to the Electric APU is suggested.
Document ID
19890059522
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Meyer, Doug (Sundstrand Corp. Rockford, IL, United States)
Weber, Kent (Sundstrand Corp. Advanced Technology Group, Rockford, IL, United States)
Scott, Walter (NASA Johnson Space Center Houston, TX, United States)