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  • 1
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    (abstract) An Assessment of Electric Propulsion Research, Development, and Application in the United States (1995)
    In:  Other Sources
    Details
    Publication Date: 2018-06-08
    Description: This paper will discuss the development of Electric Propulsion technology in the U.S. from the 1960's to the present. It will summarize the various activities related to arcjets, resistojets, pulsed plasma thrustors, magneto-plasma-dynamic thrustors, ion engines, and more recently the evaluation of Hall effect thrustors of the SPT or Anode Layer type developed in Russia. Also, demonstration test flight and actual mission applications will be summarized. Finally, the future application of electric propulsion to near-term commercial communications satellites and planetary missions will be projected. This history is rich in diversity, and has involved a succession of types of thrustors, propellants, and electric power sources. With the recent use of arcjets on commercial communication satellites and the flight tests of ion engines for this application, it appears that electric propulsion is finally on the verge of wide spread application.
    Keywords: Communications and Radar
    Format: text
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  • 2
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    The U.S. Planetary Exploration Program (1998)
    In:  Other Sources
    Details
    Publication Date: 2018-06-08
    Keywords: Lunar and Planetary Science and Exploration
    Type: International Space Technology Symposium; Omiya; Japan
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    A catalogue of auroral observations from China, Korea and Japan (193 B.C. - A.D. 170) (1995)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: This is the first comprehensive catalogue of auroral records from East Asia to be published in a European language. The catalogue, which extends from 193B.C. to A.D. 1770, contains nearly 850 separate entries. Observations are compiled from the histories of China, Korea and Japan.
    Keywords: Geophysics
    Type: RAL-TR-95-073 , (ISSN 1358-6254)
    Format: text
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  • 4
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    Flight Control Laws for NASA's Hyper-X Research Vehicle (1999)
    In:  CASI
    Details
    Publication Date: 2019-07-10
    Description: The goal of the Hyper-X program is to demonstrate and validate technology for design and performance predictions of hypersonic aircraft with an airframe-integrated supersonic-combustion ramjet propulsion system. Accomplishing this goal requires flight demonstration of a hydrogen-fueled scramjet powered hypersonic aircraft. A key enabling technology for this flight demonstration is flight controls. Closed-loop flight control is required to enable a successful stage separation, to achieve and maintain the design condition during the engine test, and to provide a controlled descent. Before the contract award, NASA developed preliminary flight control laws for the Hyper-X to evaluate the feasibility of the proposed scramjet test sequence and descent trajectory. After the contract award, a Boeing/NASA partnership worked to develop the current control laws. This paper presents a description of the Hyper-X Research Vehicle control law architectures with performance and robustness analyses. Assessments of simulated flight trajectories and stability margin analyses demonstrate that these control laws meet the flight test requirements.
    Keywords: Aircraft Design, Testing and Performance
    Type: AIAA Paper 99-4124
    Format: application/pdf
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  • 5
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    Study of a High-Energy Upper Stage for Future Shuttle Missions (2003)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Space Shuttle Orbiters are likely to remain in service to 2020 or beyond for servicing the International Space Station and for launching very high value spacecraft. There is a need for a new STS-deployable upper stage that can boost certain Orbiter payloads to higher energy orbits, up to and including Earth-escape trajectories. The inventory of solid rocket motor Inertial Upper Stages has been depleted, and it is unlikely that a LOX/LH2-fueled upper stage can fly on Shuttle due to safety concerns. This paper summarizes the results of a study that investigated a low cost, low risk approach to quickly developing a new large upper stage optimized to fly on the existing Shuttle fleet. Two design reference missions (DRMs) were specified: the James Webb Space Telescope (JWST) and the Space Interferometry Mission (SIM). Two categories of upper stage propellants were examined in detail: a storable liquid propellant and a storable gel propellant. Stage subsystems 'other than propulsion were based largely on heritage hardware to minimize cost, risk and development schedule span. The paper presents the ground rules and guidelines for conducting the study, the preliminary conceptual designs margins, assessments of technology readiness/risk, potential synergy with other programs, and preliminary estimates of development and production costs and schedule spans. Although the Orbiter Columbia was baselined for the study, discussion is provided to show how the results apply to the remaining STS Orbiter fleet.
    Keywords: Spacecraft Propulsion and Power
    Type: AIAA Paper 2003-5128 , 39th AIAA Joint propulsion Conference and Exhibit; Jul 20, 2003 - Jul 23, 2003; Huntsville, AL; United States
    Format: application/pdf
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  • 6
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    The Impact of NASA's Technology at the State and Local Government Level (1999)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: This paper presents a speech on The Impact of NASAS's Technology at the State and Local Government level.
    Keywords: Technology Utilization and Surface Transportation
    Type: Dec 04, 1999; Quebec City; Canada
    Format: application/pdf
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  • 7
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    Initial Flight Test of the Production Support Flight Control Computers at NASA Dryden Flight Research Center (1999)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The NASA Dryden Flight Research Center has completed the initial flight test of a modified set of F/A-18 flight control computers that gives the aircraft a research control law capability. The production support flight control computers (PSFCC) provide an increased capability for flight research in the control law, handling qualities, and flight systems areas. The PSFCC feature a research flight control processor that is "piggybacked" onto the baseline F/A-18 flight control system. This research processor allows for pilot selection of research control law operation in flight. To validate flight operation, a replication of a standard F/A-18 control law was programmed into the research processor and flight-tested over a limited envelope. This paper provides a brief description of the system, summarizes the initial flight test of the PSFCC, and describes future experiments for the PSFCC.
    Keywords: Aircraft Stability and Control
    Type: NASA/TM-1999-206581 , H-2343 , NAS 1.15:206581 , AIAA Paper 99-4203 , Guidance, Navigation, and Control; Aug 09, 1999 - Aug 11, 1999; Portland, OR; United States
    Format: application/pdf
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