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  • AERODYNAMICS  (4)
  • INSTRUMENTATION AND PHOTOGRAPHY  (4)
  • SPACE VEHICLES  (2)
  • 1970-1974  (10)
Collection
Keywords
Years
Year
  • 1
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    Cold cathode gage /Lunar atmosphere detector/ (1970)
    In:  CASI
    Details
    Publication Date: 2004-12-06
    Description: Apollo 12 cold cathode gage and lunar atmospheric pressure measurements
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: NASA. MANNED SPACECRAFT CENTER APOLLO 12- PRELIM. SCI. REPT. 1 JUN. 1970; P 93-97
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Lunar orbital mass spectrometer experiment (1972)
    In:  CASI
    Details
    Publication Date: 2005-11-30
    Description: A lunar orbital mass spectrometer carried by the Apollo 16 command and service module was used to detect the lunar atmosphere and to search for active lunar volcanism. The experimental procedure and results are described.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: Apollo 16 Prelim. Sci. Rept.; 6 p
    Format: text
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  • 3
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    Low-energy electron experiment for Atmosphere Explorer-C and -D. (1973)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: The low-energy electron experiment will provide differential measurements of the energy influx and angular distributions of electrons and protons on the Atmosphere Explorer-C and -D missions. The detectors consist of cylindrical electrostatic analyzers for species and energy selection and Spiraltron electron multipliers as particle sensors. The C version will contain three detectors, two measuring electrons and protons from 0.2 to 25 keV in 16 logarithmically spaced steps and one measuring 5 keV electrons continuously. Angular distributions will be acquired utilizing the spin of the spacecraft. The D version will contain 19 detectors, one proton-stepped energy analyzer, and two electron-stepped energy analyzers at two different angles, again over the energy range 0.2 to 25 keV.
    Keywords: SPACE VEHICLES
    Type: Radio Science; 8; Apr. 197
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  • 4
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    Vacuum measurements on the lunar surface. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Results of measurements of neutral gas pressure on the lunar surface made with a cold cathode ionization gauge carried to the moon by Apollo 14. The vacuum quality at the landing site is much influenced by the adsorption of rocket gases and their later release. During surface operations by the astronauts, the pressure was near 10 to the minus 8th torr. No data were obtained between the time of the surface operations and lunar sunset about 12 days later, at which time the temperature fell rapidly to the vicinity of 100 K. The pressure was about 10 to the minus 12th torr shortly after sunset, but intermittent releases of gas, perhaps from within the moon itself, occasionally raised the pressure by less than an order of magnitude for as long as a day or two at a time and on one occasion to about 10 to the minus 10th torr for about an hour. At lunar sunrise, as the surface was warmed rapidly to about 300 K, the pressure rose rapidly to about 10 to the minus 10th torr, most likely due to the release of absorbed gases in the immediate landing area or on the landing module itself. For comparison with interplanetary vacuum conditions, the directed pressure of the solar wind is usually less than 10 to the minus 11th torr and the pressure of random gas motion within the solar wind, less than 10 to the minus 13th torr.
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
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  • 5
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    Investigation of a highly loaded multistage fan driven turbine (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Parametric turbine vector diagram calculation for design of highly loaded multistage fan driven turbine
    Keywords: AERODYNAMICS
    Type: NASA-CR-1862
    Format: application/pdf
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  • 6
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    Aerodynamic investigation of four-vane cascade designed for turbine cooling studies Technical memorandum (1970)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Aerodynamic characteristics of annular sector, four vane cascade made for cooled turbine thermodynamic studies
    Keywords: AERODYNAMICS
    Type: NASA-TM-X-1954 , E-5294
    Format: application/pdf
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  • 7
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    Computer program describing turbine aerodynamic requirements, approximate external blade geometries, and coolant flow requirements for a two stage axial flow turbine (1971)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Computer program to generate turbine aerodynamic requirements, approximate external blade geometries, and coolant flow requirements for two stage axial flow turbine
    Keywords: AERODYNAMICS
    Type: NASA-TM-X-2229 , E-6014
    Format: application/pdf
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  • 8
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    Some comparisons of the flow characteristics of a turbofan compressor system with and without inlet pressure distortion (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The measured effects of a circumferential distortion in inlet total pressure on the fan, low, and high compressor of an afterburning turbofan engine are presented and discussed. Extensive inner-stage instrumentation, combined with a unique test technique offered an accurate means of measuring the shifts in flow, performance, and stall mechanisms within the compressor. These effects are compared at one speed to the corresponding effects measured with undistorted inlet flow. The results show the rate at which the distorted flow areas were attenuated and rotated, as well as the change in flow velocities that occurred at various points in the compressor. High response pressure traces indicated the location of stalls including the sequence of dynamic events from the onset and propagation of various stall-recovery events, to compressor surge, to the resulting hammershock.
    Keywords: AERODYNAMICS
    Type: Workshop on Unsteady Flows in Jet Engines; Jul 11, 1974 - Jul 12, 1974; East Hartford, CT; US
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  • 9
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    Development and in-flight performance of the Mariner 9 spacecraft propulsion system (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: On November 14, 1971, Mariner 9 was decelerated into orbit about Mars by a 1334 N (300 lbf) liquid bipropellant propulsion system. This paper describes and summarizes the development and in-flight performance of this pressure-fed, nitrogen tetroxide/monomethyl hydrazine bipropellant system. The design of all Mariner propulsion subsystems has been predicted upon the premise that simplicity of approach, coupled with thorough qualification and margin-limits testing, is the key to cost-effective reliability. The qualification test program and analytical modeling are also discussed. Since the propulsion subsystem is modular in nature, it was completely checked, serviced, and tested independent of the spacecraft. Proper prediction of in-flight performance required the development of three significant modeling tools to predict and account for nitrogen saturation of the propellant during the six-month coast period and to predict and statistically analyze in-flight data.
    Keywords: SPACE VEHICLES
    Type: Astronautical research 1972; Oct 08, 1972 - Oct 15, 1972; Vienna; Austria
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  • 10
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    Skylab earth resources experiment package (1971)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Skylab earth resources experimental equipment, describing sensing and recording instrumentation for electromagnetic spectral pattern recognition studies
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: AIAA PAPER 71-841 , SPACE SYSTEMS MEETING; Jul 19, 1971 - Jul 20, 1971; DENVER, CO
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