The effects of equal-pressure fixed slots on the characteristics of a Clark Y airfoil / Albert Sherman and Thomas A. Harris.
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| Format: | Government Document Book |
| Language: | English |
| Published: |
Washington D.C. :
National Advisory Committee for Aeronautics,
1934.
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| Series: | Technical note (United States. National Advisory Committee for Aeronautics) ;
507. |
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| Abstract: | A 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 a wind tunnel to determine the pssibilities 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 airl 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 ratio can be as high as for the plain wing. |
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| Item Description: | "October 1934." NACA TN number 507. |
| Physical Description: | 7 pages, 3 unnumbered pages : illustrations, tables ; 27 cm. |
| Bibliography: | Includes bibliographical references. |
| Action Note: | committed to retain |