vortex lift

The disadvantage of vortex lift is the drag that it produces.

Vortex lift works by capturing vortices generated from the sharply swept leading edge of the wing.

The concept of leading edge suction first was put forth to describe vortex lift on sharp-edged delta wings.

Vortex lift is a form of lift generated by delta wings operating at high angles of attack.

One popular but disputed theory is that the crab-claw wing works like a delta wing, generating vortex lift.

The crab claw sail may partially circumvent this problem by harnessing the delta-wing's vortex lift.

The major advantage of vortex lift is that it allows angles of attack that would stall a normal wing.

The vortex lift effect is increased by extensions of the leading edge at the wing root (the juncture with the fuselage) known as a strake.

This has led fifth-generation jet fighter designs to replace low-stealth Canard surfaces with chines, when helping to generate vortex lift over the main wings.

Vortices are a primary cause of drag in most aircraft, and the large vortices generated when using vortex lift cause correspondingly high drag.

The wing, while only 3% thick, provided substantial lift due to its large area, which, aided by vortex lift, allowed takeoff and landing speeds comparable to a Boeing 707.

The aerodynamic design of the M-346 uses vortex lift to provide manoeuvrability and controllability at very high angle of attack (up to 40 degrees) using a fly-by-wire control system.

Aerodynamic innovations included variable-camber wings and exploitation of the vortex lift effect to achieve higher angles of attack through the addition of leading-edge extension devices such as strakes.

The vertical stabilizer often employs a small fillet or "dorsal fin" at its forward base which helps to increase the stall angle of the vertical surface (thanks to vortex lift) and to prevent a phenomenon called rudder lock or rudder reversal.

Through the 1950s Russell became increasingly interested in supersonic flight, and was particularly interested in the "breathtaking novelty" of the slender-wing delta, which Royal Aircraft Establishment demonstrated gave massive lift at high angle of attack due to its formidable vortex lift capabilities.

The wing's outer leading edge incorporates three-section slats, while the inboard sections have additional slats to generate vortex lift over the inner wing and high-energy air-flow along the tail fin to enhance high-AoA stability and prevent departure from controlled flight.

Aerodynamic studies in the early 1960s demonstrated that the phenomenon known as "vortex lift" could be beneficially harnessed by the adoption of highly swept wing configurations to reach higher angles of attack through use of the strong leading edge vortex flow off a slender lifting surface.

Double delta wing aircraft (Concorde, Tupolev Tu-144, Boeing 2707 SST project) featured a forward extended leading edge that may be considered as a wing strake ; it provides the same additional vortex lift at high AoA by leading edge suction.