The angle between the airfoil's chord line and the relative wind is also called what?

The angle between the airfoil's chord line and the relative wind is also called what?

• A. Angle of Attack
• B. Airfoil
• C. Absolute Altitude
• D. Advancing Blade

Answer: (A)

The angle between the airfoil's chord line and the relative wind is called the angle of attack. This angle shows how much the airfoil is pitched into the oncoming air, and it directly influences how much lift the wing can produce. As you tilt the wing to increase AoA, lift generally rises up to a critical point, after which flow separation causes a loss of lift (stall). The other terms don’t describe this geometric relationship: the airfoil is the wing shape itself, absolute altitude is vertical height above a reference, and advancing blade refers to a rotor blade’s motion, not the wing’s angle to the airflow.

The angle between the airfoil's chord line and the relative wind is called the angle of attack. This angle shows how much the airfoil is pitched into the oncoming air, and it directly influences how much lift the wing can produce. As you tilt the wing to increase AoA, lift generally rises up to a critical point, after which flow separation causes a loss of lift (stall). The other terms don’t describe this geometric relationship: the airfoil is the wing shape itself, absolute altitude is vertical height above a reference, and advancing blade refers to a rotor blade’s motion, not the wing’s angle to the airflow.