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Orbital transfer vehicle concept definition and system analysis study. Volume 1A: Executive summary. Phase 2The objectives of the Phase 2 study were to improve the orbit transfer vehicle (OTV) concept definition by focusing on the following issues: the impact of mission requirements on OTV system design; OTV basing concepts on the Space Shuttle, separate platforms, and/or remote locations; cost reduction of an OTV program to improve its economic benefits and support its acquisition. The OTV mission scenario includes a wide range of missions the main drivers of which are manned GEO servicing, mid-inclination/polar DOD, and lunar/planetary projects. A mission model is presented which includes the type and number of missions per year and the estimated propellant requirements. To accomplish the missions, many OTV concepts were defined including ground-based OTVs launched either in the STS orbiter, the aft cargo carrier, or a heavy lift launch vehicle, and a space-based OTV. System and program trade studies were conducted using performance, cost, safety/risk, and operations/growth criteria. The study shows that mission requirements and substantial economic benefits justify a reusable, cryogenic (H2/O2) space-based OTV. Such a system would not be subjected to Earth-to-orbit launch loads and would not be constained in size or weight. Safety is enhanced by the fact that the system components are launched unfueled. Its inherent reusability and ability to be refueled in space make the space-based OTV very economical to operate.
Document ID
19870011585
Document Type
Contractor Report (CR)
Authors
Ketchum, W. J.
(General Dynamics Corp. Huntsville, AL, United States)
Date Acquired
September 5, 2013
Publication Date
December 1, 1986
Subject Category
Spacecraft Design, Testing And Performance
Report/Patent Number
NAS 1.26:179055
NASA-CR-179055
GDSS-SP-86-011-VOL-1A
Accession Number
87N21018
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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