Private Pilot License (PPL) Aerodynamics Practice Exam

An increase in angle of attack initially increases lift as the airflow over the wings becomes more favorable for generating lift. This phenomenon occurs because a higher angle of attack impacts the pressure distribution on the wing's surface, causing a greater difference between the pressure above and below the wing. This increased pressure differential results in a rise in lift.

However, this relationship continues only up to a critical angle of attack, known as the stall angle. Beyond this point, the airflow can no longer smoothly adhere to the wing's surface, leading to flow separation and a significant reduction in lift. This decline occurs because the wing is no longer able to generate sufficient lift to support the aircraft, resulting in what is known as a stall.

Understanding this dynamic is crucial for pilots since it highlights the importance of maintaining an appropriate angle of attack during flight to ensure safe and efficient operation.