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Accession Number
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N20120013880
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Title
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Engine-Out Capabilities Assessment of Heavy Lift Launch Vehicles.
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Publication Date
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2012
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Media Count
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28p
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Personal Author
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C. Thrasher J. Holladay K. Baggett K. S. Bellamy S. Feldman
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Abstract
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Engine-out (EO) is a condition that might occur during flight due to the failure of one or more engines. Protection against this occurrence can be called engine-out capability (EOC) whereupon significantly improved loss of mission may occur, in addition to reduction in performance and increased cost. A standardized engine-out capability has not been studied exhaustively as it pertains to space launch systems. This work presents results for a specific vehicle design with specific engines, but also uniquely provides an approach to realizing the necessity of EOC for any launch vehicle system design. A derived top-level approach to engine-out philosophy for a heavy lift launch vehicle is given herein, based on an historical assessment of launch vehicle capabilities. The methodology itself is not intended to present a best path forward, but instead provides three parameters for assessment of a particular vehicle. Of the several parameters affected by this EOC, the three parameters of interest in this research are reliability (Loss of Mission (LOM) and Loss of Crew (LOC)), vehicle performance, and cost. The intent of this effort is to provide insight into the impacts of EO capability on these parameters. The effects of EOC on reliability, performance and cost are detailed, including how these important launch vehicle metrics can be combined to assess what could be considered overall launch vehicle affordability.
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Keywords
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Engine failure
Heavy lift launch vehicles
Hydrogen oxygen engines
Launch costs
Losses
Mission planning
Reliability analysis
Rocket engine design
Spacecraft launching
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Source Agency
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National Aeronautics and Space Administration
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NTIS Subject Category
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84E - Space Launch Vehicles & Support Equipment
81G - Rocket Engines & Motors
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Corporate Author
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National Aeronautics and Space Administration, Huntsville, AL. George C. Marshall Space Flight Center.
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Document Type
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Conference proceedings
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Title Note
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N/A
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NTIS Issue Number
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1305
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Contract Number
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N/A
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