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The Gurney Flap: A Simple Yet Effective Aerodynamic Device for Wings

What is a Gurney Flap?

A Gurney flap is a small tab projecting from the trailing edge of a wing. It is typically 1-2% of the chord length in height and is perpendicular to the chord line. Gurney flaps were invented by well-known race car driver and team manager Dan Gurney in 1971 for use on his team's cars to increase traction for better handling.

How does a Gurney Flap Work?

Gurney flaps work by increasing the pressure gradient between the upper and lower surfaces of the wing. This increased pressure gradient results in an increase in the maximum lift coefficient and a decrease in the angle of attack for zero lift. Gurney flaps can also be used to improve the stall characteristics of a wing.

Applications of Gurney Flaps

Gurney flaps are used in a variety of applications, including:

• Race cars
• Airplanes
• Wind turbines
• Sailboats

Gurney flaps are a simple and effective way to improve the aerodynamic performance of wings. They are easy to install and can be used in a variety of applications.