An introduction to airfoils and how wings create lift through the Venturi effect, as well as the key items of the chord line, relative wind and the angle of attack. As the angle of attack is increased, air around the airfoil changes its reaction based on the boundary layer, until the wing reaches a critical angle of attack where the plane then stalls, and produces significantly less lift. This will then cause an audible alert in the cockpit, alerting the pilot to reduce this angle to enable continued safe flight.

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