Cylindrical wing tip with helical slot

Details Cylindrical wing tip with helical slot Cylindrical wing tip with helical slot

2005-05-17

2005-05-17

Dinh, Tien (Department: 3644)

Aeronautics and astronautics

Aircraft sustentation

Sustaining airfoils

Reexamination Certificate

active

06892988

ABSTRACT:
A device having the form of a cylindrical spiral cavity and/or incorporating a helicoidal slot, making it possible to reduce induced drag and marginal swirl (vortex) and increase drag/lift ratio. Integrated with the wingtip or articulated on the wingtip, it can be adapted for all airfoils, in particular the wings of airplanes and gliders, helicopter blades and the tips or tractor or pusher airscrews, wind-powered generator blades and for surface vessels or submarines where lift or direction is used in triple axis (vertical, horizontal, and yaw) displacement. Used in a reverse configuration (undersurface/upper surface) on high speed land vehicles or racing cars, this device, when secured to the tip of each wing, produces a result inversely proportional to speed. The faster the vehicle is traveling, the less drag it generates and greater its ground adhesion.

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