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  • 1
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    Results from the occultation of 14 PISCIUM by (51) NEMAUSA (1984)
    Institute of Physics
    Details
    Publication Date: 1984-11-01
    Print ISSN: 0004-6256
    Electronic ISSN: 1538-3881
    Topics: Physics
    Published by Institute of Physics
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    PAPER CURRENT
  • 2
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    High angle-of-attack flight dynamics of a forward-swept wing fighter configuration (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: As part of a forward-swept wing technology development effort, the Defense Advanced Research Projects Agency (DARPA), and the NASA Langley Research Center are conducting a cooperative research program to investigate the high angle-of-attack, stall and spin characteristics associated with the forward-swept wing concept. The studies are centered around the X-29A configuration which is being built to flight demonstrate the application of forward-swept wing technology to a fighter class airplane. The program includes static and dynamic wind-tunnel force tests, free-flight model tests, drop-model tests, spin-tunnel tests, and piloted simulation studies. Selected results are presented from the Langley research program on the X-29A configuration with emphasis on the high-alpha aerodynamics and the vehicle component contributions to these characteristics. The effects of these aerodynamic characteristics on the overall high-alpha flying qualities of the configuration are discussed in terms of results of the wind-tunnel free-flight tests and the piloted simulation study.
    Keywords: AIRCRAFT STABILITY AND CONTROL
    Type: AIAA PAPER 83-1837
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Results from the occultation of 14 Piscium by (51) Nemausa (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Observations of the September 11, 1983 occultation of 14 Psc by the asteroid (51) Nemausa were obtained at six sites distributed across the northern two-thirds of the track. The observations are well represented by an elliptical limb profile with a semimajor axis of 84.9 + or - 2.0 km and oblateness (1-b'/a') 0.20 + or - 0.05. The mean radius of 74 + or - 4 km agrees with the 1979 occultation effective radius of 76.5 + or - 4 km and the published radiometric radius of 75.5 km (Morrison and Zellner, 1979).
    Keywords: ASTRONOMY
    Type: Astronomical Journal (ISSN 0004-6256); 89; 1755-175
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    High-angle-of-attack stability characteristics of a 3-surface fighter configuration (1983)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A wind tunnel investigation was conducted to study the low speed, high angle of attack stability characteristics of a three surface fighter concept based on the F-15 configuration. Static force data were measured over angle of attack and side-slip ranges of 0 to 85 and -10 and 10 deg, respectively. A force oscillation technique was used to obtain dynamic derivatives at angles of attack from 0 to 60 deg. The tests were conducted for several canard deflections and with the canards removed to investigate the effects of the close coupled canard on the high angle of attack stability characteristics of the configuration. A fuselage strake was developed which significantly improved static lateral directional stability characteristics at high angles of attack while also increasing the maximum lift of the configuration.
    Keywords: AIRCRAFT STABILITY AND CONTROL
    Type: NASA-TM-84584 , L-15551 , NAS 1.15:84584
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Research on the F/A-18E/F Using a 22%-Dynamically-Scaled Drop Model (2000)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Research on the F/A-18E/F configuration was conducted using a 22%-dynamically-scaled drop model to study flight dynamics in the subsonic regime. Several topics were investigated including longitudinal response, departure/spin resistance, developed spins and recoveries, and the failing leaf mode. Comparisons to full-scale flight test results were made and show the drop model strongly correlates to the airplane even under very dynamic conditions. The capability to use the drop model to expand on the information gained from full-scale flight testing is also discussed. Finally, a preliminary analysis of an unusual inclined spinning motion, dubbed the "cartwheel", is presented here for the first time.
    Keywords: Aerodynamics
    Type: AIAA Paper 2000-3913 , Atmospheric Flight Mechanics; Aug 14, 2000 - Aug 17, 2000; Denver, CO; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    High angle-of-attack characteristics of a forward-swept wing fighter configuration (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The NASA-Langley Research Center is currently investigating the high angle-of-attack characteristics of a forward-swept wing fighter technology demonstrator in a cooperative program with the Defense Advanced Research Projects Agency. The program includes static and dynamic wind-tunnel force tests, free-flight model tests, spin-tunnel tests, and piloted simulation. Particular emphasis is placed on identifying the contributions of the forward-swept wing to the configuration aerodynamics at high angles of attack. Results are presented to illustrate the wing contributions in terms of aerodynamic stability, flow visualization, and observation of free-flight characteristics.
    Keywords: AIRCRAFT STABILITY AND CONTROL
    Type: AIAA PAPER 82-1322 , Atmospheric Flight Mechanics Conference; Aug 09, 1982 - Aug 11, 1982; San Diego, CA
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Preliminary results of experimental and analytical investigations of the tumbling phenomenon for an advanced configuration (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: A sustained autorotative pitching motion usually called 'tumbling' has been observed during dynamic model tests of the X-29A configuration. The X-29 is an advanced design incorporating forward-swept wings and canards in a highly relaxed static stability condition. Beginning with a historical review of the tumbling phenomenon, this paper discusses the current experimental results of dynamic model tumbling tests of the X-29 and the initial efforts to establish an aerodynamic and mathematical model for analysis.
    Keywords: AIRCRAFT STABILITY AND CONTROL
    Type: AIAA PAPER 84-2108
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    High angle-of-attack characteristics of three-surface fighter aircraft (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: As part of a research program aimed at providing information on the high angle-of-attack characteristics of three-surface fighter concepts incorporating a close-coupled canard, an investigation is being conducted on two specific configurations based on the F-18 and F-15 designs. The study configurations are being subjected to a wide range of tests including wind-tunnel tests, dynamic model tests, and piloted simulation. This paper summarizes the results obtained to date in this study. High-alpha results in the areas of static stability, damping, and control characteristics are reviewed and some of the more significant aerodynamic phenomena are identified.
    Keywords: AIRCRAFT STABILITY AND CONTROL
    Type: AIAA PAPER 82-0245 , Aerospace Sciences Meeting; Jan 11, 1982 - Jan 14, 1982; Orlando, FL
    Format: text
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    NASA TECHNICAL REPORTS
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