Wingtip vortex propeller

Details Wingtip vortex propeller Wingtip vortex propeller

1984-02-02

1985-08-06

Barefoot, Galen L.

Aeronautics and astronautics

Aircraft sustentation

Sustaining airfoils

244 55, B64D 2702

Patent

active

045331014

ABSTRACT:
A device which increases the energy efficiency of aircraft wherein a wingtip pusher propeller 12 is positioned aft of the wingtip 18 to rotate in the crossflow of the wingtip vortex. The propeller 12 rotates against the vortex swirl creating additional thrust from and attenuating the wingtip vortex by simultaneously extracting energy from the vortex and converting it to propeller blade-induced thrust while injecting its high energy wake into the vortex axial flow to dissipate the vortex. As a result, the device increase aircraft fuel efficiency by simultaneously increasing thrust and decreasing vortex induced drag. By attenuating the vortex safety to following aircraft is maximized.

REFERENCES:
patent: 2485218 (1949-10-01), Shaw
patent: 2604276 (1952-07-01), Huben
patent: 3260476 (1966-07-01), James
patent: 3997132 (1976-12-01), Erwin
patent: 4045144 (1977-08-01), Loth
patent: 4415133 (1983-11-01), Phillips

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