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  • AIRCRAFT DESIGN, TESTING AND PERFORMANCE  (2)
  • FACILITIES, RESEARCH, AND SUPPORT  (2)
  • 1
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    V/STOL and STOL ground effects and testing techniques (1987)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: The ground effects associated with V/STOL operation were examined and an effort was made to develop the equipment and testing techniques needed for that understanding. Primary emphasis was on future experimental programs in the 40 x 80 and the 80 x 120 foot test sections and in the outdoor static test stand associated with these facilities. The commonly used experimental techniques are reviewed and data obtained by various techniques are compared with each other and with available estimating methods. These reviews and comparisons provide insight into the limitations of past studies and the testing techniques used and identify areas where additional work is needed. The understanding of the flow mechanics involved in hovering and in transition in and out of ground effect is discussed. The basic flow fields associated with hovering, transition and STOL operation of jet powered V/STOL aircraft are depicted.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: Proceedings of the 1985 NASA Ames Research Center's Ground-Effects Workshop; p 1-145
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Ground effects on V/STOL and STOL aircraft - A survey (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The flow fields encountered by jet- and fan-powered Vertical/Short Takeoff and Landing (V/STOL) aircraft operating in ground effect are reviewed and their general effects on the aerodynamic characteristics are discussed. The ground effects considered include (1) the suckdown experienced by a single jet configuration in hover, (2) the fountain flow and additional suckdown experienced by multiple jet configurations in hover, (3) the ground vortex generated by jet and jet flap configurations in Short Takeoff and Landing (STOL) operation and the associated aerodynamic and hot-gas-ingestion effects, and (4) the change in the downwash at the tail due to ground proximity. After over 30 years of research on V/STOL aircraft, the general flow phenomena are well known and, in most areas, the effects of ground proximity can be estimated or can be determined experimentally. However, there are some anomalies in the current data base which are discussed.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: AIAA PAPER 85-4033
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Factors influencing the choice of facilities and techniques for aeronautical development. (1968)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Factors influencing development of both wind tunnel and flight test technology for determining aerodynamic derivatives of aircraft motions
    Keywords: FACILITIES, RESEARCH, AND SUPPORT
    Type: ; ACE(|NEW YORK ACADEMY OF SCIENCES, INTERNATIONAL CONGRESS ON SUBSONIC AERONAUTICS; Apr 03, 1967 - Apr 06, 1967; NEW YORK, NY
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Factors Influencing the Choice of Facilities and Techniques for Aeronautical Development (1967)
    In:  CASI
    Details
    Publication Date: 2019-08-14
    Description: Aircraft noise air traffic control and aircraft design effects on aeronautical development techniques are discussed.
    Keywords: FACILITIES, RESEARCH, AND SUPPORT
    Type: NASA-TM-X-59741 , L-5476 , INTERN. CONGR. OF SUBSONIC AERON.; Apr 03, 1967 - Apr 06, 1967; NEW YORK
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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