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A design approach and selected wind tunnel results at high subsonic speeds for wing-tip mounted winglets,” NASA Technical Note No. TN-D-8260, Washington, D.C. 1976.
2. P. F. Jacobs ,
S. G. Flechner , and
L. C. Montoya , “
Effect of winglets on a first generation jet transport wing. 1: Longitudinal aerodynamic characteristics of a semispan model at subsonic speeds,” NASA Technical Note No. Nasa TN-D-8473, Washington, D.C. 1977.
3. Sea Trials of the Ducted Tip Propeller