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NASA-LLIS-0962
Lessons Learned – Space Shuttle Main Engine (SSME): Computer Models of Transient Performance
Year: 1995
Abstract: Description of Driving Event:
Fuel or oxidizer starvation will cause hazardous conditions due to off-nominal mixture ratios in liquid propellant rocket engines. A safe and repeatable start sequence was developed by making maximum use of the engine mounted computer to control propellant valve positions. The report stated that "Without the precise timing and positioning (of valves) allowed by the Main Engine controller (MEC), it is doubtful that a satisfactory start could have been deve.
Fuel or oxidizer starvation will cause hazardous conditions due to off-nominal mixture ratios in liquid propellant rocket engines. A safe and repeatable start sequence was developed by making maximum use of the engine mounted computer to control propellant valve positions. The report stated that "Without the precise timing and positioning (of valves) allowed by the Main Engine controller (MEC), it is doubtful that a satisfactory start could have been deve.
Subject: Configuration Management
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T18:12:57Z | |
| date available | 2017-09-04T18:12:57Z | |
| date copyright | 05/15/1995 | |
| date issued | 1995 | |
| identifier other | HDUEQCAAAAAAAAAA.pdf | |
| identifier uri | http://yse.yabesh.ir/std;jsery=autho162s7D8308/handle/yse/195944 | |
| description abstract | Description of Driving Event: Fuel or oxidizer starvation will cause hazardous conditions due to off-nominal mixture ratios in liquid propellant rocket engines. A safe and repeatable start sequence was developed by making maximum use of the engine mounted computer to control propellant valve positions. The report stated that "Without the precise timing and positioning (of valves) allowed by the Main Engine controller (MEC), it is doubtful that a satisfactory start could have been deve. | |
| language | English | |
| title | NASA-LLIS-0962 | num |
| title | Lessons Learned – Space Shuttle Main Engine (SSME): Computer Models of Transient Performance | 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 |