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An Analysis of the Aerodynamic Characteristics of Split Flaps

Published online by Cambridge University Press:  28 July 2016

Extract

During the past few years an extensive amount of experimental data on split flaps has been made available to the aircraft industry, through the publications of aeronautical research laboratories, both in this country and abroad. In general, each publication deals with one particular aspect of the problem, and when the effect of wing flaps on the performance of an aircraft is being estimated a certain amount of difficulty may be experienced in deciding which of the many reports available gives results most readily applicable to the case being considered ; and what allowances, if any, should be made for wing taper, flap cut-out, fuselage, etc.

In this report the available data has been analysed with a view to answering these questions, and presented in such a form that it may be readily applied to determine the most probable change in the aerodynamic characteristics of a wing that may be expected from the use of this type of flap.

From the appendix an estimate of the accuracy of the method can be obtained, as a comparison with full-scale data is given for lift and drag, and for the other flap characteristics the original curves have been reproduced.

Type
Research Article
Copyright
Copyright © Royal Aeronautical Society 1940

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References

List of References

1. The effect of partial-span split flaps on the aerodynamic characteristics of a Clark Y wing. By Wenzinger, C. J.. N.A.C.A. Technical Note No. 472 (1933).Google Scholar
2. Wind-tunnel measurements of air loads on split flaps. By Wenzinger, C. J.. N.A.C.A. Technical Note No. 498 (1934).Google Scholar
3. The effects of full-span and partial-span split flaps on the aerodynamic characteristics of a tapered wing. By Wenzinger, C. J.. N.A.C.A. Technical Note No. 505 (1934).Google Scholar
4. A method of estimating the aerodynamic effects of ordinary and split flaps on airfoils similar to Clark Y. By Pearson, H. A.. N.A.C.A. Technical Note No. 571 (1936).Google Scholar
5. Full-scale span load distribution on a tapered wing with split flaps of various spans. By Parsons, J. F. and Silverstein, A.. N.A.C.A. Technical Note No. 591 (1937).Google Scholar
6. Pressure distribution over a Clark Y-H airfoil section with a split flap. By Wenzinger, C. J.. N.A.C.A. Technical Note No. 627 (1937).Google Scholar
7. Interference of wing and fuselage from tests of 18 combinations in the N.A.C.A. variable-density tunnel. Combinations with split flaps. By Sherman, A.. N.A.C.A. Technical Note No. 640 (1938).Google Scholar
8. Wind-tunnel investigation of rectangular and tapered N.A.C.A. 23012 wings with plain ailerons and full-span split flaps. By Wenzinger, C. J. and Ames, M. B.. N.A.C.A. Technical Note No. 661 (1938).Google Scholar
9. Investigation of full-scale split trailing-edge wing flaps with various chords and hinge locations. By Wallace, R.. N.A.C.A. Report No. 539 (1935).Google Scholar
10. Wind-tunnel investigation of ordinary and split flaps on airfoils of different profile. By Wenzinger, C. J.. N.A.C.A. Report No. 554 (1936).Google Scholar
11. Pressure distribution over a rectangular airfoil with a partial-span split flap. By Wenzinger, C. J. and Harris, T. A.. N.A.C.A. Report No. 571 (1936).Google Scholar
12. Wind-tunnel investigation of tapered wings with ordinary ailerons and partial-span split flaps. By Wenzinger, C. J.. N.A.C.A. Report No. 611 (1937).Google Scholar
13. Wind-tunnel tests of the characteristics of wing flaps and their wakes. By Clark, K. W. and Kirkby, F. W.. A.R.C. Report and Memorandum No. 1698 (1936).Google Scholar
14. Engineering aerodynamics. By Diehl, W. S.. Ronald Press, New York (1928).Google Scholar
15. Flaps and pitching moments. By Russell, A. E.. Flight Engineering Section (October, 1936).Google Scholar