The major contributing factor to lift is the tilt or angle of the airfoil. Which option identifies this factor?

The major contributing factor to lift is the tilt or angle of the airfoil. Which option identifies this factor?

• A. Wing area
• B. Weight
• C. Tilt or angle of the airfoil
• D. Engine power

Answer: (C)

Lift is governed by how the wing meets the oncoming air, and the tilt of the airfoil relative to that air—the angle of attack—directly controls how much lift is produced. As the angle of attack increases, the air flows over the wing in a way that creates a larger pressure difference between the upper and lower surfaces, generating more lift up to the point where the flow stalls. This relationship is captured by the lift equation L = 1/2 ρ V^2 S Cl(α): the lift coefficient Cl is a function of the angle of attack, so changing the tilt of the wing changes lift for the same speed, air density, and wing area. Wing area does influence lift in that a larger wing can produce more lift overall, but the rate at which lift increases with angle of attack is driven primarily by the angle itself. Weight must be lifted, not created, so it doesn’t contribute to generating lift. Engine power affects thrust and speed, which can alter the air's dynamic pressure, but it doesn’t directly set how much lift the wing produces at a given condition.

Lift is governed by how the wing meets the oncoming air, and the tilt of the airfoil relative to that air—the angle of attack—directly controls how much lift is produced. As the angle of attack increases, the air flows over the wing in a way that creates a larger pressure difference between the upper and lower surfaces, generating more lift up to the point where the flow stalls. This relationship is captured by the lift equation L = 1/2 ρ V^2 S Cl(α): the lift coefficient Cl is a function of the angle of attack, so changing the tilt of the wing changes lift for the same speed, air density, and wing area.

Wing area does influence lift in that a larger wing can produce more lift overall, but the rate at which lift increases with angle of attack is driven primarily by the angle itself. Weight must be lifted, not created, so it doesn’t contribute to generating lift. Engine power affects thrust and speed, which can alter the air's dynamic pressure, but it doesn’t directly set how much lift the wing produces at a given condition.