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Induced drag of wings in ground effect

Published online by Cambridge University Press:  21 November 2016

P.J. Mantle
P.J. Mantle*
Affiliation:
Vashon, Washington, USA
*
[email protected]
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Abstract

This paper provides a set of closed form solutions for the lift and drag of wings flying in ground effect both with and without end plates. The developed theories are based on observations of several independent sources of controlled model tests over ground planes and over water and on previous theories prepared by researchers from the original work by Prandtl and Wieselsberger to the present day. The theories developed cover wings of varying aspect ratio, thickness to chord ratios and angle of attack. The results for wings with end plates include the effect of ground (or surface) clearance height, end plate depth and air gap depths beneath the wings or end plates. Good agreement is found between the developed theory and test.

Keywords

Aerodynamicsaircraft designfluid dynamicsperformancepropulsionwing in ground effectinduced draglift curve slopeend platesvortex formationground clearancelift-drag ratioekranoplaninduced drag factorinfluence coefficient
Type
Research Article
Information
The Aeronautical Journal , Volume 120 , Issue 1234 , December 2016 , pp. 1867 - 1890
Copyright
Copyright © Royal Aeronautical Society 2016 

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References

REFERENCES

1. Mantle, P.J. High-Speed Marine Craft: One Hundred Knots at Sea, 2015, Cambridge University Press, Cambridge, UK. CrossRefGoogle Scholar
2. Lanchester, F.W. Aerodynamics, 1907, Constable & Co., Ltd., London, England.Google Scholar
3. Prandtl, L. Tragflächentheorie (Wing Theory), I Mitteilung (Note I) Nachrichten der K. Gesellschaft der Wissenschaften zu Göttingen, Math-phys. Klasse, 1918. Note II published in 1919.Google Scholar
4. Wieselsberger, C. Über den Flugwiderstand in der Nähe des Boden (Wing resistance near the ground), originally published in Zeitschrift für Flugtechnik und Motorluftschiffahrt, 10, p 145, 1921. Translated and published as NACA Technical Memorandum No. 77, April 1922.Google Scholar
5. Jones, R.T. Corrections of the Lifting Line Theory for the Effect of Chord, NACA Tech Note 817, July 1941, Langley Aeronautical Laboratory, Virginia, US.Google Scholar
6. Mantle, P.J. High-Speed Marine Craft: One Hundred Knots at Sea, 2015, Cambridge University Press, Cambridge, UK.Google Scholar
7. Fink, M.P. and Lastinger, J.L. Aerodynamic Characteristics of Low Aspect Ratio Wings in Close Proximity to the Ground, NASA Technical Note D-926, July 1961, Langley Aeronautical Laboratory, Virginia, US.Google Scholar
8. Carter, A.W. Effect of Ground Proximity on the Aerodynamic Characteristics of Aspect Ratio 1 Airfoils With and Without End Plates, NASA Technical Note D-970, October 1961, Langley Aeronautical Laboratory, Virginia, US.Google Scholar
9. Ashill, P.R. On the minimum induced drag of ground-effect wings, The Aeronautical Quarterly, August 1970, XXI, Part 3.Google Scholar
10. Kida, T. and Miyai, Y. Minimum induced drag of non-planar ground effect wings with small tip clearance, The Aeronautical Quarterly, February 1974, XXV, pp 19–36.Google Scholar
11. Shigenori, A. and Yashiro, H. Minimum induced drag of ground effect wings, J. Hydronautics, 10, (3), July 1976, pp 106–112.Google Scholar
12. Wingship Investigation Final Report, 1994, Advanced Research Projects Agency (ARPA), now Defense Advanced Research Projects Agency (DARPA), Arlington, Virginia, US.Google Scholar