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Space Shuttle Main Engine Start with Off-Nominal Propellant Inlet PressuresThis paper describes Rocketdyne's successful analysis and demonstration of the Space Shuttle Main Engine (SSME) operation at off-nominal propellant inlet conditions during the Reusable Launch Vehicle (RLV) evaluation tests. The nominal inlet condition range is: 103 to 111 psia and 170.5 to 178 deg. R for the oxidizer and 43 to 47 psia and 37 to 40 deg. R for the fuel. The SSME start was successfully demonstrated with engine inlet pressures of 50 psia liquid oxygen (LOX) with subcooled LOX at 160 deg R and 38 psia fuel at 38 deg. R. Four tests were used to incrementally modify the start sequence to demonstrate the final goal.
Document ID
Acquisition Source
Marshall Space Flight Center
Document Type
Contractor Report (CR)
Bradley, Michael
(Boeing Defense and Space Group Canoga Park, CA United States)
Date Acquired
September 6, 2013
Publication Date
July 7, 1997
Publication Information
Publisher: American Inst. of Aeronautics and Astronautics
Subject Category
Spacecraft Propulsion And Power
Report/Patent Number
NAS 1.26:205359
AIAA Paper 97-2687
Meeting Information
Meeting: Joint Propulsion
Location: Seattle, WA
Country: United States
Start Date: July 6, 1997
End Date: July 9, 1997
Sponsors: Society of Automotive Engineers, Inc., American Society for Electrical Engineers, American Inst. of Aeronautics and Astronautics, American Society of Mechanical Engineers
Accession Number
Funding Number(s)
Distribution Limits
Work of the US Gov. Public Use Permitted.
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