Accession Number:

AD0416048

Title:

AN ANALYSIS OF THE RESULTS OF WIND TUNNEL TESTS MADE AT THE UNIVERSITY OF WICHITA ON CIRCULAR ANNULAR JET GROUND EFFECT MACHINE MODELS,

Descriptive Note:

Corporate Author:

WALKER (NORMAN K) ASSOCIATES INC BETHESDA MD

Personal Author(s):

Report Date:

1963-07-01

Pagination or Media Count:

87.0

Abstract:

The tests conducted on circular GEM models at the University of Wichita in 1960 and 1961 for the Office of Naval Research are the most comprehen sive source of wind tunnel data on ground effect machines now available. A wide range of jet thicknesses and jet angles were tested over a great altitude range. Jet pressures and wind tunnel speeds were varied and measurements were made of lift, drag, pitching mvment and jet mass flow for a number of values of the angle of in cidence between model and ground board. Pressure distributions were also measured in detail but this data has not, in general, been reduced. This report analyzes the zero incidence case in detail. It is shown that the results are very consistent and that the effect of forward speed and jet pressure ratio can be eliminated by the use of a forward speed parameter. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE