As the AOA increases, what two forces also increase?

As the AOA increases, what two forces also increase?

• A. Lift and weight
• B. Lift and drag
• C. Thrust and drag
• D. Weight and drag

Answer: (B)

Increasing the angle of attack makes the wing work harder to deflect the air downward, which raises the lift generated by the wing—lift increases as the lift coefficient grows, up to the point of stall. At the same time, more energy is lost to turning the air and to flow separation, so drag also increases. Induced drag rises with the lift being produced, and profile drag grows as the wing’s angle of attack gets larger and the flow becomes more disturbed. So, as AOA increases, both lift and drag increase (until you reach the stall, after which lift stops rising and drag continues to grow).

Increasing the angle of attack makes the wing work harder to deflect the air downward, which raises the lift generated by the wing—lift increases as the lift coefficient grows, up to the point of stall. At the same time, more energy is lost to turning the air and to flow separation, so drag also increases. Induced drag rises with the lift being produced, and profile drag grows as the wing’s angle of attack gets larger and the flow becomes more disturbed. So, as AOA increases, both lift and drag increase (until you reach the stall, after which lift stops rising and drag continues to grow).