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  • Other Sources  (5,136)
  • LUNAR AND PLANETARY EXPLORATION  (3,680)
  • PROPULSION SYSTEMS  (1,456)
  • 1980-1984  (3,213)
  • 1970-1974  (1,923)
Collection
  • Other Sources  (5,136)
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Keywords
Years
Year
  • 1
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    Curatorial functions and the U.S. Antarctic meteorite program (1981)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: The discovery of concentrations of meteorites in Antarctica by Japanese field parties in 1969, and subsequently by joint U.S.-Japanese and U.S. field parties since 1976 has provided a significant new resource for understanding the origin and evolution of the solar system. The number of meteorites as well as the variety of meteorites has increased dramatically, and substantial amounts of data derived from their study has begun to appear in the scientific literature. The U.S. program of investigation has drawn on curatorial experience derived from the lunar program to: (1) develop specific collection and preliminary examination protocols; (2) provide documented samples for scientific investigations in response to specific requests; and (3) coordinate research by scientific consortia. The productivity of scientific research is significantly enhanced by these management approaches. Some of the results of the curatorial program for Antarctic meteorites carried out over the past three years are described.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: National Institute of Polar Research, Memoirs (ISSN 0386-0744); 20, D
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  • 2
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    Supersonic cruise inlets (1971)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Design and characteristics of supersonic cruise inlets
    Keywords: PROPULSION SYSTEMS
    Type: AIRCRAFT PROPULSION 1971; P 283-312
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  • 3
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    Pulse performance analysis for small hypergolic propellant rocket engines (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Small rocket engine tests were conducted for the purpose of obtaining pulse performance data to aid in preliminary design and evaluation of attitude control systems. Both monopropellant and hypergolic bipropellant engines of thrust levels from 5 to 445 N (1 to 100 lb) were tested. The performance data for the hypergolic propellant rockets are compared with theoretical performance calculated from idealized chamber filling and evacuation characteristics. Electromechanical delays in valve response and heat transfer characteristics were found to cause substantial deviation between theoretical performance and test performance. The theoretical analysis is modified to obtain a semiempirical model for hypergolic propellant rockets.
    Keywords: PROPULSION SYSTEMS
    Type: Res. Achievements Rev., Vol. 4, No. 6; p 61-74
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  • 4
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    Extendible rocket nozzle development (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: An evaluation is presented of J-2 engine modifications that will simplify operation and improve reliability of the advanced Saturn 1C launch vehicle. Methods of increasing thrust without extensively modifying the S-2 or S-4B stages are also evaluated. A thrust increase was achieved by raising engine combustion through a redesign of the engine thrust chamber and propellant feed system.
    Keywords: PROPULSION SYSTEMS
    Type: Res. Achievements Rev., Vol. 4, No. 6; p 105-115
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  • 5
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    Velocity diagrams (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: The selection and design of velocity diagrams for axial flow turbines are considered. Application is treated in two parts which includes: (1) mean-section diagrams, and (2) radial variation of diagrams. In the first part, the velocity diagrams occurring at the mean section are assumed to represent the average conditions encountered by the turbine. The different types of diagrams, their relation to stage efficiency, and their selection when staging is required are discussed. In the second part, it is shown that in certain cases the mean-section diagrams may or may not represent the average flow conditions for the entire blade span. In the case of relatively low hub- to tip-radius ratios, substantial variations in the velocity diagrams are encountered. The radial variations in flow conditions and their effect on the velocity diagrams are considered.
    Keywords: PROPULSION SYSTEMS
    Type: Turbine Design and Appl., Vol. 1; p 69-99
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  • 6
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    Realization of the ideas of K. E. Tsiolkovskiy in the reports of the GSRM (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Design and development of rocket engines
    Keywords: PROPULSION SYSTEMS
    Type: TRANS. OF THE FIRST LECTURES DEDICATED TO THE DEVELOP. OF THE SCI. HERITAGE OF K. E. TSIOLKOVSKIY APR. 1970; P 1-10
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  • 7
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    Basic turbine concepts (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: Turbine geometric, flow, energy transfer, efficiency, and performance characteristics are considered by the use of definitions, diagrams, and dimensionless parameters. Emphasis is placed on the determination of the fluid velocity as it passes from one blade row to the next. The general methods for constructing velocity diagrams and relating them to the work and flow capacity of the turbine are discussed.
    Keywords: PROPULSION SYSTEMS
    Type: Turbine Design and Appl., Vol. 1; p 21-67
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  • 8
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    Development of Tsiolkovskiy's ideas on the use of air in the engines of space vehicles (1970)
    In:  CASI
    Details
    Publication Date: 2005-11-27
    Description: Atmospheric air storage for use in space vehicle engines during planetary flight
    Keywords: PROPULSION SYSTEMS
    Type: TRANS. OF THE FIRST LECTURES DEDICATED TO THE DEVELOP. OF THE SCI. HERITAGE OF K. E. TSIOLKOVSKIY APR. 1970; P 69-76
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  • 9
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    Ode to gravity: Depth/diameter for fresh craters on Mercury (1984)
    In:  CASI
    Details
    Publication Date: 2009-11-23
    Description: Opinions conflict over the role of surface gravity in shaping impact craters on Mercury. One view holds that the effects of g are evident in measurable aspects of crater form; other investigators find little or no evidence for g's geomorphic importance. Ambiguity in the role of g and other variables in cratering on Mercury stems largely from uncertainty in identifying major geomorphic contrasts and the crater sizes at which they occur. One of these, depth/diameter (d/D), undergoes a major change at the transition from simple (bowl shaped) to complex (peaks and terraces) crater interiors. Four least-squares d/D fits for fresh craters on Mercury were attemped. The results are inconsistent. The d/D data that should resolve previous shortcomings is presented. The revised d/D distributions for simple and complex craters, which intersect at a diameter of about 5 km, support the initial thesis that g substantially influences the form of Mercury's craters.
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: NASA. Washington Rept. of Planetary Geol. Program, 1983; p 104-106
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  • 10
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    Apollo 12 soil mechanics investigation (1971)
    In:  CASI
    Details
    Publication Date: 2006-08-20
    Keywords: LUNAR AND PLANETARY EXPLORATION
    Type: Calif. Univ. Res. in the Space Sci., v. 2; 24 p
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