wing vortices
Vortices form because of the difference in pressure between the upper and lower surfaces of a wing that is operating at a positive lift. Since pressure is a continuous function, the pressures must become equal at the wing tips.
Vortices
Air from the high pressure region under the wing flows to the low pressure region above the wing when generating lift, the result are vortices. This reduces the effective lifting area of the wing and generates drag.
vortices - See wingtip vortices
VTOL (Vertical TakeOff and Landing) - Aircraft that have the capability of vertical takeoff and landing. VTOL aircraft are not limited to helicopters.
wingtip vortices - Circular patterns of air created by the movement of an airfoil through the air when generating lift. As an airfoil moves through the atmosphere in sustained flight, an area of area of low pressure is created above it.
VORTICES Regions of high velocity that develop at the tip of a wing as it flies through the air.
Vortices are part of the air. A vortex in a moving airmass will be carried along with the air.
Wingtip vortices on conventional wingtip and blended winglet
A winglet is a near-vertical extension of the wing tips.
Wing vortices
One might ask what the downwash from a wing looks like. The downwash comes off the wing as a sheet and is related to the details of the load distribution on the wing.
Wake turbulence: Wingtip vortices generated behind a wing producing lift. Behind a large heavy aircraft they can be powerful enough to roll or even break up a smaller aircraft.
Let us not forget from our ground school instruction that larger aircraft in a landing configuration (gear down and flaps down) create quite an air disturbance and significant vortices are generated.
These air flows (inboard above and outboard below) meet at the trailing edge of the wing where they also form vortices. When viewing an aircraft from behind the left vortice will rotate clockwise and the right vortice anticlockwise.
Induced Drag: That part of the drag which is caused by vortices at the wing tips. It is the drag which results from the lift. Pushing a wing through the air, to generate lift in it, causes violent disturbance of the air at the tips.
WAKE TURBULENCE Turbulent air condition caused by small, tornado-like horizontal whirlwinds trailing an aircraft's wingtips (wingtip vortices).
The performance of the aircraft depends on the distance from the right to the left tip vortices (the effective wing span), and not the actual measured geometric span.
mounted at opposite angles of attack to each other and perpendicular to the aerodynamic surface they serve, vortex generators improve high- and low-speed characteristics.Like any airfoil, vortex generators develop lift and very strong tip vortices.
Lift Induced Drag: Drag resulting from turbulence originating in the wingtip vortices that are created when the wings begin to generate lift.
LDA: Landing Distance Available.
LRA: Landing Run Available.
The Static Port is frequently located in an area that is undisturbed by vortices and turbulence from the aircraft, and can just read the airflow without excess force from a control surface of the airplane.
 See also: Aircraft, Flight, Speed, Lift, Direct
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