Private Pilot License (PPL) Aerodynamics Practice Exam

Changes in the center of pressure of a wing affect the aircraft's:

1. Engine performance

2. Aerodynamic balance and controllability

3. Fuel consumption

4. Maximum airspeed

The correct answer is: Aerodynamic balance and controllability

The center of pressure is the point on the wing where the resultant aerodynamic forces effectively act. As the angle of attack of the wing changes, the location of the center of pressure shifts. This shift can significantly impact the aerodynamic balance of the aircraft. When the center of pressure moves forward or backward relative to the center of gravity, it affects the moments acting on the aircraft, which can lead to changes in pitch attitude. A forward shift can cause increased nose-up tendencies, whereas a backward shift can create a tendency for the aircraft to pitch down. This dynamic directly influences controllability because pilots rely on the balance between lift, weight, drag, and thrust to maintain control and stability. Consequently, a change in the center of pressure can make the aircraft more stable or unstable, thus altering how it handles in various flight conditions. Understanding the behavior of the center of pressure is crucial for maintaining effective control and ensuring safety during flight. It plays a pivotal role in the overall aerodynamic balance of the aircraft.