Angle of AttackĪt a high angle of attack (around 16 degrees or so for most GA airplanes), the airflow begins to become turbulent over the top of the wing instead of smooth, and thus a loss of lift occurs since most of our lift comes from the low-pressure airflow over the top of the wing. The difference between these two lines gives us our Angle of Attack. To define the Angle of Attack, we are looking for the difference between the angle that the “relative wind” is meeting the wing at and the chord line. The Chord line, as shown below, travels from the leading edge to the trailing edge. The angle at which the relative wind meets the chord line of the wing. Remember as we discussed in the four forces of flight, total lift must overcome total weight in order for an aircraft to fly.The magnitude of lift created by the wing relates directly to the density of the air, the area of the wing, wing shape, airspeed, and angle of attack.
Every aircraft has an angle of attack where maximum lift (the stall) occurs.It is critical to understand Angle of attack, as it directly relates to many aspects of aircraft performance, stability, and control.
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