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  • AIRCRAFT DESIGN, TESTING AND PERFORMANCE  (5)
  • 1
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    Laminar flow control leading-edge systems in simulated airline service (1990)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: Journal of Aircraft (ISSN 0021-8669); 27; 239-244
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Flight investigation of insect contamination and its alleviation (1978)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: An investigation of leading edge contamination by insects was conducted with a JetStar airplane instrumented to detect transition on the outboard leading edge flap and equipped with a system to spray the leading edge in flight. The results of airline type flights with the JetStar indicated that insects can contaminate the leading edge during takeoff and climbout. The results also showed that the insects collected on the leading edges at 180 knots did not erode at cruise conditions for a laminar flow control airplane and caused premature transition of the laminar boundary layer. None of the superslick and hydrophobic surfaces tested showed any significant advantages in alleviating the insect contamination problem. While there may be other solutions to the insect contamination problem, the results of these tests with a spray system showed that a continouous water spray while encountering the insects is effective in preventing insect contamination of the leading edges.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: CTOL Transport Technol., 1978; p 357-373
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Summary of results of NASA F-15 flight research program (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: NASA conducted a multidisciplinary flight research program on the F-15 airplane. The program began in 1976 when two preproduction airplanes were obtained from the U.S. Air Force. Major projects involved stability and control, handling qualities, propulsion, aerodynamics, propulsion controls, and integrated propulsion-flight controls. Several government agencies and aerospace contractors were involved. In excess of 330 flights were flown, and over 85 papers and reports were published. This document describes the overall program, the projects, and the key results. The F-15 was demonstrated to be an excellent flight research vehicle, producing high-quality results.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: AIAA PAPER 86-9761
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Cloud particle effects on laminar flow in the NASA LEFT program - Preliminary results (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Laminar flow offers the promise of significant fuel savings on future commercial transport aircraft, but laminar flow can be lost while encountering clouds or haze at cruise conditions. To quantify the effect of cloud particles on laminar flow during typical airline operating conditions, and evaluate candidate cloud particle detection instrument concepts for future laminar flow aircraft, two types of cloud particle detectors are being flown aboard a NASA JetStar aircraft in the Leading Edge Flight Test (LEFT) program. The instrumentation is described, and preliminary results and conclusions are presented.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: AIAA PAPER 86-9811
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Laminar flow control leading edge systems in simulated airline service (1988)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The feasibility of two candidate leading-edge flow laminarization systems applicable to airline service was tested using representative airline operational conditions with respect to air traffic, weather, and airport insect infestation. One of the systems involved a perforated Ti alloy suction surface with about 1 million 0.0025-in. diameter holes drilled by electron beam, as well as a Krueger-type flap that offered protective shielding against insect impingement; the other supplied surface suction through a slotted Ti alloy skin with 27 spanwise slots on the upper and lower surface.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: ICAS Congress; Aug 28, 1988; Jerusalem; Israel
    Format: text
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    NASA TECHNICAL REPORTS
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