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.
