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  • 1
    facet.materialart.
    Unbekannt
    Inflated antennas (1983)
    In:  CASI
    Details
    Publikationsdatum: 2006-02-14
    Beschreibung: Inflatable space antennas are discussed. A brief history of inflatable structures is given. Several antenna configurations are described. The antenna configuration consisting of a thin film cone and parabolic held to the proper shape by internal pressure is discussed in detail.
    Schlagwort(e): LAUNCH VEHICLES AND SPACE VEHICLES
    Materialart: Large Space Antenna Systems Technol., Pt. 1; p 545-574
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 2
    facet.materialart.
    Unbekannt
    Biaxial and electrostatic tensioning effects on thin membrane materials (1981)
    In:  CASI
    Details
    Publikationsdatum: 2006-02-14
    Beschreibung: Thin membrane materials were subjected to biaxial and electrostatic tensioning loads to study techniques for maintaining surface smoothness of a thin membrane antenna. The basic mechanical and electrical setup for the tests is described and preliminary measurements of surface smoothness and surface deviation are presented.
    Schlagwort(e): SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Materialart: The Microwave Radiometer Spacecraft; p 189-204
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 3
    facet.materialart.
    Unbekannt
    Large inflated-antenna system (1984)
    In:  CASI
    Details
    Publikationsdatum: 2006-04-03
    Beschreibung: It is proposed that for inflatable antenna systems, technology feasibility can be demonstrated and parametric design and scalability (scale factor 10 to 20) can be validated with an experiment using a 16-m-diameter antenna attached to the Shuttle. The antenna configuration consists of a thin film cone and paraboloid held to proper shape by internal pressure and a self-rigidizing torus. The cone and paraboloid would be made using pie-shaped gores with the paraboloid being coated with aluminum to provide reflectivity. The torus would be constructed using an aluminum polyester composite that when inflated would erect to a smooth shell that can withstand loads without internal pressure.
    Schlagwort(e): SPACECRAFT DESIGN, TESTING AND PERFORMANCE
    Materialart: STEP Expt. Requirements; p 311-324
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 4
    facet.materialart.
    Unbekannt
    Measurement of electrostatically formed antennas using photogrammetry and theodolites (1984)
    In:  Other Sources
    Details
    Publikationsdatum: 2018-12-01
    Beschreibung: An antenna concept is presently being evaluated which has extremely low mass and high surface precision for potential depolyment from the Space Shuttle. This antenna concept derives its reflector surface quality from the application of electrostatic forces to tension and form a thin membrane into the desired concave reflector surface. The Shuttle-deployed antenna would have a diameter of 100 meters and an RMS surface smoothness of 10 to 1 mm for operation at 1 to 10 GHz. NASA Langley Research Center (LaRC) has built, and is currently testing, a subscale (1/20 scale) membrane reflector model of such an antenna. Several surface measurement systems were evaluated as part of the experimental surface measuring efforts. The surface measurement systems are addressed as well as some of the preliminary measurement results.
    Schlagwort(e): INSTRUMENTATION AND PHOTOGRAPHY
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 5
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    Unbekannt
    Investigation of the subsonic and supersonic release characteristics of an externally carried fuel tank from a 1/4 d-scale model of a bomber airplane (1961)
    In:  CASI
    Details
    Publikationsdatum: 2019-05-29
    Beschreibung: Release and flight characteristics study for externally carried fuel tank models of various configurations at subsonic and supersonic speeds
    Schlagwort(e): AERODYNAMICS
    Materialart: NASA-TM-X-354
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 6
    facet.materialart.
    Unbekannt
    Transonic and supersonic ejection release characteristics of six dynamically scaled external-store shapes from an 0.086-scale model of a current fighter airplane (1959)
    In:  CASI
    Details
    Publikationsdatum: 2019-05-23
    Beschreibung: Fighter aircraft external stores ejection at transonic and supersonic speeds
    Schlagwort(e): AERODYNAMICS
    Materialart: NASA-TM-X-128
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 7
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    Unbekannt
    Electrostatic forming and testing of polymer films on a 16-foot diameter test fixture (1985)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-28
    Beschreibung: The large space systems technology program investigated different forms of large, lightweight, deployable structures which could be carried on the Space Shuttle. Different forms and concepts of antennas as a type of large space system were investigated. The electrostatically controlled membrane reflector made of metallized material concept was chosen. The concept is a good candidate for creating an antenna with high surface quality and has the ability to be packaged and deployed from the Shuttle with a significant reduction in weight compared to other antenna types.
    Schlagwort(e): ELECTRONICS AND ELECTRICAL ENGINEERING
    Materialart: NASA-TM-86328 , NAS 1.15:86328
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 8
    facet.materialart.
    Unbekannt
    Uniaxial and biaxial tensioning effects on thin membrane materials (1980)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Thin laminated membranes are being considered for various surface applications on future large space structural systems. Some of the thin membranes would be stretched across or between structural members with the requirement that the membrane be maintained within specified limits of smoothness which would be dictated by the particular applications such as antenna reflector requirements. The multiaxial tensile force required to maintain the smoothness in the membrane needs to be determined for use in the structure design. Therefore, several types of thicknesses of thin membrane materials have been subjected to varied levels of uniaxial and biaxial tensile loads. During the biaxial tests, deviations of the material surface smoothness were measured by a noncontacting capacitance probe. Basic materials consisted of composites of vacuum deposited aluminum on Mylar and Kapton ranging in thickness from 0.00025 in (0.000635 cm) to 0.002 in (0.00508 cm). Some of the material was reinforced with Kevlar and Nomex scrim. The uniaxial tests determined the material elongation and tensile forces up to ultimate conditions. Biaxial tests indicated that a relatively smooth material surface could be achieved with tensile force of approximately 1 to 15 Newtons per centimeter, depending upon the material thickness and/or reinforcement.
    Schlagwort(e): COMPOSITE MATERIALS
    Materialart: NASA-TM-81812
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 9
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    Unbekannt
    Effects of jet pluming on the static stability of five rocket models at Mach numbers of 4, 5 and 6 and static pressure ratios up to 26,000 (1967)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Jet pluming effect on static stability of five cone cylinder-flare finned rocket models at Mach numbers of 4, 5, and 6 and static pressure ratios up to 26,000
    Schlagwort(e): AERODYNAMICS
    Materialart: NASA-TN-D-4064
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
  • 10
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    Unbekannt
    Water injection from 9 deg hemisphere-cone into a hypersonic airstream (1970)
    In:  CASI
    Details
    Publikationsdatum: 2019-06-27
    Beschreibung: Water injection from nozzles of RAM C spacecraft models in hypersonic wind tunnels to study ion sheath penetration characteristics of spray
    Schlagwort(e): AERODYNAMICS
    Materialart: NASA-TN-D-5739 , L-6714
    Format: application/pdf
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    NASA TECHNICAL REPORTS
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