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The effects of equal-pressure fixed slots on the characteristics of a Clark Y AirfoilA type of fixed open slot so arranged that no flow would pass through it at a lift coefficient corresponding to high-speed flight was investigated in the N.A.C.A. 7 by 10 foot wind tunnel to determine the possibilities of such a high-lift device for increasing the speed-range ratio of a wing. The condition of no through flow was achieved by locating the slot openings at points of equal static pressure at the design lift coefficient as determined from the pressure distribution about the plain wing. Two models of Clark Y wings with such equal-pressure slots were tested and the smoke-flow patterns about them observed. The results of this investigation show that the condition of no air flow through the slot at the desired lift coefficient is attainable. The surface discontinuities produced by the slot openings have, however, such a large effect on the drag that such slots show little promise. An appreciable increase is produced in the maximum lift and the speed-range can be as high as for the plain wing.
Document ID
19930081281
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Harris, Thomas A
Sherman, Albert
Date Acquired
September 6, 2013
Publication Date
October 1, 1934
Report/Patent Number
NACA-TN-507
Accession Number
93R10571
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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