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Orbit Transfer Rocket Engine Technology Program, Advanced Engine Study Task D.6
ROCKWELL INTERNATIONAL CANOGA PARK CA ROCKETDYNE DIV
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In Task D.6 of the Advanced Engine Study, three primary subtasks were accomplished 1 Design and Parametric Data, 2 Engine Requirement Variation Studies, and 3 Vehicle StudyEngine Study Coordination. Parametric data were generated for vacuum thrusts ranging from 7500 lbf to 50000 lbf, nozzle expansion ratios from 600 to 1200, and engine mixture ratios from 51 to 71. the Failure Modes and Effects Analysis FMEA driven baseline design generated in Tasks D.4 and D.5 was used as a departure point for these parametric analyses. These data are intended to assist in vehicle definition and trade studies. In the Engine Requirements Variation Studies, the individual effects of increasing the throttling ratio from 101 to 201 and requiring the engine to operate at a maximum mixture ratio of 121 were determined. Off-design engine balances were generated at these extreme conditions and individual component operating requirements analyzed in detail. Potential problems were identified and possible solutions generated. In the Vehicle StudyEngine Study coordination subtask, vehicle contractor support was provided as needed, addressing a variety of issues uncovered during vehicle trade studies. This support was primarily provided during Technical Interchange Meetings TIM in which Space Exploration Initiative SEI studies were addressed.
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