Private Pilot Private Exam

Changes in the center of pressure of a wing affect which aspect of an aircraft?

1. Aerodynamic balance and controllability

2. Fuel efficiency and range

3. Engine performance and thrust

4. Structural integrity of the wing

The correct answer is: Aerodynamic balance and controllability

The center of pressure refers to the point on an airfoil where the total aerodynamic lift force can be considered to act. As the angle of attack changes, the location of the center of pressure moves, which in turn can significantly influence the aerodynamic balance of the aircraft. When the center of pressure moves, it alters how the aerodynamic forces are applied to the aircraft and affects the pitching moments produced around the aircraft's center of gravity. This can impact controllability, as the pilot must manage these changes during flight to maintain stable flight conditions and achieve desired maneuvers. A forward movement of the center of pressure tends to create a nose-down moment, which may require the pilot to push forward on the control yoke. Conversely, a rearward movement can create a nose-up moment, potentially leading to a stall if not properly managed. In contrast, while fuel efficiency, engine performance, and structural integrity may play crucial roles in overall aircraft performance, they are not directly impacted by changes in the center of pressure. Therefore, understanding the relationship between the center of pressure, aerodynamic balance, and controllability is fundamental for a pilot in ensuring safe and efficient flight operations.