Author: D. M. FinchPublisher:
ISBN:
Category :
Languages : en
Pages : 241
Book Description
Evaluation of Runway Lighting Systems for Effectiveness in Dense Fog. Final Report
Author: D. M. FinchEvaluation of Runway Lighting Systems for Effectiveness in Dense Fog
Author: Dan M. FinchPublisher:
ISBN:
Category : Airports
Languages : en
Pages : 220
Book Description
Tests of runway lighting systems in dense fog show that an intensity of 200 to 300 cp, now in general use for centerline lights at U.S. airports, is not high enough for effective guidance in a fog density of 1200-ft visual range, day or night. These tests also indicate that in daytime, with a 1200-ft visual range, runway marking is considerably useful to pilots as a supplement to runway lighting. In addition, on the basis of pilots' reactions, the present U.S. standard pattern (3:3:3) for touchdown-zone and centerline lights was found to be more effective than either of two other patterns (3:2:1 and 7:3:1) evaluated. Pilots also preferred a modified version of the present U.S. standard approach-light system. The tests were performed in a specially designed facility using artificially produced fog and a linear scale reduction factor of 1/10. Evaluations were made from pilot observations, as well as photometric-measurement and photographic techniques. The test facilities and methods are described, the test results are presented, and some of the influencing factors, such as background brightness and cockpit cutoff angle, are discussed. In addition, a number of recommendations are made with regard to intensities and photometric distributions for runway lights, and with respect to changes in the present U.S. standard approach light system. (Author).
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Author: United States. Department of Commerce. Office of Technical ServicesPublisher:
ISBN:
Category : Technology
Languages : en
Pages : 258
Book Description
Technical Abstract Bulletin
Author: Defense Documentation Center (U.S.)Publisher:
ISBN:
Category : Science
Languages : en
Pages : 784
Book Description
Evaluation of Radio-luminescent Lighting System
Author: Thomas H. PaprockiPublisher:
ISBN:
Category : Airports
Languages : en
Pages : 30
Book Description
Scientific and Technical Aerospace Reports
Author: An Interim Report on Runway Touchdown Zone Lighting for Dulles International Airport
Author: Robert F. GatesPublisher:
ISBN:
Category : Airports
Languages : en
Pages : 124
Book Description
Photometer Detection Contrast and Visibility of Runway Lighting in Dense Fog
Author: D. M. FinchPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 66
Book Description
Using a specially developed photometric method, the visibility of a runway lighting system was studied under various conditions of visual range and background brightness. The method is based on measurement of a defined quantity, C sub d, called photometer detection contrast, and depends on the correlation of this quantity with subjective visibility. All tests were performed in the FAA Fog Chamber at 1/10 scale. Photometric data for the runway lights were obtained in daytime and nighttime visual ranges of 1200, 900, and 700 ft, and maximum visibility distances for various portions of the lighting system were then determined on the basis of an assumed value of .06 for the minimum usable C sub d. Based on the number of lighting elements that would be visible to a pilot under the various test conditions studied, it was concluded that the lighting system would become but marginally effective for visual guidance in a daytime fog of 900-ft visual range and background brightness of about 50-600 fL. The same would hold true for a nighttime fog of 700-ft visual range. In a daytime visual range of 700 ft, the system would no longer provide effective visual guidance. (Author).
Government-wide Index to Federal Research & Development Reports
Author: Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1078
Book Description
Author: