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A design approach and selected wind tunnel results at high subsonic speeds for wing-tip mounted wingletsWinglets, which are small, nearly vertical, winglike surfaces, substantially reduce drag coefficients at lifting conditions. The primary winglet surfaces are rearward above the wing tips; secondary surfaces are forward below the wing tips. This report presents a discussion of the considerations involved in the design of the winglets; measured effects of these surfaces on the aerodynamic forces, moments, and loads for a representative first generation, narrow body jet transport wing; and a comparison of these effects with those for a wing tip extension which results in approximately the same increase in bending moment at the wing-fuselage juncture as did the addition of the winglets.
Document ID
19760019075
Document Type
Other - NASA Technical Note (TN)
Authors
Whitcomb, R. T. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 3, 2013
Publication Date
July 1, 1976
Subject Category
AERODYNAMICS
Report/Patent Number
L-10908
NASA-TN-D-8260
Funding Number(s)
PROJECT: RTOP 505-11-16-08
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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NameType 19760019075.pdf STI