The center of pressure is affected by which of the following?

The center of pressure is affected by which of the following?

• A. Air density
• B. Wing loading
• C. Engine power
• D. Angle of attack

Answer: (D)

The center of pressure is the point where the resultant aerodynamic force can be considered to act, and its location is set by how the pressure distribution on the wing changes. That distribution is directly affected by the angle of attack, because tilting the wing relative to the airstream changes which parts of the surface experience high and low pressures. As angle of attack changes, the lift distribution shifts along the wing, so the line of action of the total aerodynamic force moves, i.e., the center of pressure changes. Air density changes the magnitude of the lift and other forces (through dynamic pressure) but does not primarily alter where the forces act on the wing. Wing loading describes how much lift is produced per unit area, which influences overall force levels but not the fundamental shift in pressure distribution caused by changing angle of attack. Engine power affects thrust, not the wing’s airflow pattern around it in steady flight. So the factor that most directly moves the center of pressure is the angle of attack.

The center of pressure is the point where the resultant aerodynamic force can be considered to act, and its location is set by how the pressure distribution on the wing changes. That distribution is directly affected by the angle of attack, because tilting the wing relative to the airstream changes which parts of the surface experience high and low pressures. As angle of attack changes, the lift distribution shifts along the wing, so the line of action of the total aerodynamic force moves, i.e., the center of pressure changes.

Air density changes the magnitude of the lift and other forces (through dynamic pressure) but does not primarily alter where the forces act on the wing. Wing loading describes how much lift is produced per unit area, which influences overall force levels but not the fundamental shift in pressure distribution caused by changing angle of attack. Engine power affects thrust, not the wing’s airflow pattern around it in steady flight. So the factor that most directly moves the center of pressure is the angle of attack.