Dogtooth Extension
A dogtooth is a small, sharp zig-zag double kink in the leading edge of a wing. On a swept wing, it is used is to generate a vortex of air flowing backwards over the wing, reducing spanwise airflow.
Where the dogtooth is added as an afterthought as for example with the Hawker Hunter and some variants of the Quest Kodiak, the dogtooth is created by adding an extension to the outer span only of the leading edge.
Read more about this topic: Leading-edge Extension
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