Wing tip devices

Details Wing tip devices Wing tip devices

2011-07-05

2011-07-05

Dinh, Tien (Department: 3644)

Aeronautics and astronautics

Aircraft sustentation

Sustaining airfoils

C244S047000, C416S238000

Reexamination Certificate

active

07971832

ABSTRACT:
A tip device to act as an outboard continuation of an aircraft wing or other aerodynamic lifting surface has a downward cant angle, a leading edge swept back in relation to the leading edge of the inboard lifting surface, and a chord reducing in the outboard direction of the device. A favourable balance between induced drag reduction and increased wing root bending moment can thereby be achieved. Preferably the device also has an upwardly canted portion at its root end so that the downward cant commences from a relatively elevated spanwise location, thereby alleviating any ground clearance problems.

REFERENCES:
patent: 1275251 (1918-08-01), Harb
patent: 3411738 (1968-11-01), Sargent
patent: 3974986 (1976-08-01), Johnstone
patent: 4108403 (1978-08-01), Finch
patent: 4595160 (1986-06-01), Santos
patent: 4674709 (1987-06-01), Welles
patent: 4975022 (1990-12-01), Perry
patent: 5039032 (1991-08-01), Rudolph
patent: 5332362 (1994-07-01), Toulmay et al.
patent: 5348253 (1994-09-01), Gratzer
patent: 5634613 (1997-06-01), McCarthy
patent: 6000911 (1999-12-01), Toulmay et al.
patent: 6089502 (2000-07-01), Herrick et al.
patent: 6474604 (2002-11-01), Carlow
patent: 6484968 (2002-11-01), Felker
patent: 6547181 (2003-04-01), Hoisington et al.
patent: 6578798 (2003-06-01), Dizdarevic et al.
patent: 6722615 (2004-04-01), Heller et al.
patent: 6772615 (2004-08-01), Hagiwara et al.
patent: 2004/0061029 (2004-04-01), McCarthy
patent: 0 351 104 (1990-01-01), None
Desopper et al. “Effect on an Anhedral Sweptback Tip on the Performance of a Helicopter Rotor”, Vertica, Pergamon Press, GB, vol. 12, No. 4, pp. 345-355 (1988).

Affiliated with

Also associated with

Rating

Wing tip devices does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Wing tip devices, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wing tip devices will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2629712