Flight Evaluation of Ground Effect on Several Low-aspect-ratio Airplanes

Flight Evaluation of Ground Effect on Several Low-aspect-ratio Airplanes
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Publisher :
Total Pages : 52
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ISBN-10 : UIUC:30112106880930
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Rating : 4/5 (30 Downloads)

Book Synopsis Flight Evaluation of Ground Effect on Several Low-aspect-ratio Airplanes by : Paul A. Baker

Download or read book Flight Evaluation of Ground Effect on Several Low-aspect-ratio Airplanes written by Paul A. Baker and published by . This book was released on 1970 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: A constant-angle-of-attack-approach technique was used to measure ground effect on several low -aspect-ratio aircraft. The flight results were compared with results from constant -altitude flybys, wind-tunnel studies, and theoretical prediction data. It was found that the constantangle-of-attack technique provided data that were consistent with data obtained from constant-altitude flybys and required fewer runs to obtain the same amount of data. The test results from an F5D-1 airplane modified with an ogee wing, a prototype F5D-1 airplane, two XB-70 airplanes, and an F-104A airplane indicate that theory and wind-tunnel results adequately predict the trends caused by ground effect as a function of height and aspect ratio. However, the magnitude of these predictions did not always agree with the flightmeasured results. In addition, there was consistent evidence that the aircraft encountered ground effect at a height above one wing span.


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