NASA-LLIS-0963
Lessons Learned – Space Shuttle Main Engine (SSME): Start Sequence Investigations
active, Most Current
| Organization: | NASA |
| Publication Date: | 15 May 1995 |
| Status: | active |
| Page Count: | 2 |
scope:
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.
Document History
NASA-LLIS-0963
May 15, 1995
Lessons Learned – Space Shuttle Main Engine (SSME): Start Sequence Investigations
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...
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