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NASA-LLIS-0963
Lessons Learned – Space Shuttle Main Engine (SSME): Start Sequence Investigations
Year: 1995
Abstract: Description of Driving Event:
Computer mathematical models had shown the engine to be sensitive to small changes in propellant conditions, and that timing relative to opening the propellant valves was critical. Expecting difficulties, a cautious step-by-step plan was followed to explore the start sequence in small time increments. It took 35 weeks and a series of 37 test, including 13 turbopump replacements to extend reliable performance form the 2-second startup transient to main power level.
Computer mathematical models had shown the engine to be sensitive to small changes in propellant conditions, and that timing relative to opening the propellant valves was critical. Expecting difficulties, a cautious step-by-step plan was followed to explore the start sequence in small time increments. It took 35 weeks and a series of 37 test, including 13 turbopump replacements to extend reliable performance form the 2-second startup transient to main power level.
Subject: Configuration Management
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T18:44:10Z | |
| date available | 2017-09-04T18:44:10Z | |
| date copyright | 05/15/1995 | |
| date issued | 1995 | |
| identifier other | KDUEQCAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std;jsessionid=3826AF679D40527318548F1EFDEC014A/handle/yse/225526 | |
| description abstract | Description of Driving Event: Computer mathematical models had shown the engine to be sensitive to small changes in propellant conditions, and that timing relative to opening the propellant valves was critical. Expecting difficulties, a cautious step-by-step plan was followed to explore the start sequence in small time increments. It took 35 weeks and a series of 37 test, including 13 turbopump replacements to extend reliable performance form the 2-second startup transient to main power level. | |
| language | English | |
| title | NASA-LLIS-0963 | num |
| title | Lessons Learned – Space Shuttle Main Engine (SSME): Start Sequence Investigations | en |
| type | standard | |
| page | 2 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1995 | |
| contenttype | fulltext | |
| subject keywords | Configuration Management | |
| subject keywords | Cryogenic Systems | |
| subject keywords | Ground Equipment | |
| subject keywords | Hardware | |
| subject keywords | Launch Vehicle | |
| subject keywords | Parts Materials & Processes | |
| subject keywords | Safety & Mission Assurance | |
| subject keywords | Spacecraft | |
| subject keywords | Test Article | |
| subject keywords | Test Facility |