What are Vortex Generators?

Vortex Generators are little tabs the stick up from the wing surface. Their function is to mix the lower velocity air of the boundary layer with the higher velocity air outside the boundary layer. This helps to recharge the boundary layer and delays separation of the boundary layer from the wing top. As the angle of attack increases the boundary layer (of air) begins to separate from the wing top starting at the trail edge. As the the angle of attack continues to increase the boundary layer continues to separate moving toward the leading edge of the wing.

Illusions Caused by Drift - Runup.ca - A Canadian Piloting Resource

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Canadian Student Pilot Illusions Caused by Drift

Objective:

To learn:

how to maintain coordinated turns when drifting in wind
how to maintain a desired track in headwinds and tailwinds

Motivation

Understanding how the wind affects your ability to turn the airplane on a desired track will improve your ability to maneuver the airplane at low levels. Furthermore, wind drift will cause illusions that can lead to potential dangerous situations. If you have a firm understanding of drift your low-level flying skills, such as in the circuit where ground tracks are important, will improve.