High taper wing tip extension

Details High taper wing tip extension High taper wing tip extension

1989-05-19

1991-08-13

Peters, Jr., Joseph F.

Aeronautics and astronautics

Aircraft sustentation

Sustaining airfoils

244124, 244 35A, 244 45R, B64C 310

Patent

active

050390325

ABSTRACT:
A highly tapered wing tip extension added to the tip of an existing swept, trapezoidal airplane wing for reducing high speed drag significantly. A smaller, highly swept, extension does not require a leading edge device to protect against low speed stall. A larger, less swept, extension requires a tapered slat for which two mechanisms are presented. The principles of the present invention are also applicable to the design of new aircraft.

REFERENCES:
patent: 1518621 (1924-12-01), Wenk
patent: 1982242 (1934-11-01), Bellanca
patent: 2361574 (1944-10-01), Tampier
patent: 2375423 (1945-05-01), Lobelle
patent: 2537369 (1951-01-01), Ostroff
patent: 3310262 (1967-03-01), Robins et al.
patent: 3438597 (1969-04-01), Kasper
patent: 3904152 (1975-09-01), Hill
patent: 4132375 (1979-01-01), Lamar
patent: 4240597 (1980-12-01), Ellis et al.
patent: 4700911 (1987-10-01), Zimmer
SAE Technical Paper 851770, "Swept Wing-Tip Shapes for Low-Speed Airplanes", by C. P. van Dam, Oct. 14-17, 1985.
NASA Technical Paper 1020, "Theoretical Parametric Study of the Relative Advantages of Winglets and Wing-Tip Extensions", by Harry H. Heyson et al., 1977.
Aviation Week & Space Technology, pp. 65-67, "Dornier Expects Extensive Sensing, Surveillance Demand for DO 228", by Michael Feazel, Sep. 9, 1985.
Aviation Week, pp. 30-33, "Theory of the Inversely Tapered Wing", by Robert McLarren, Mar. 21, 1949.

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