Center of Pressure is defined as a point along the wing chord line where lift is concentrated. Which of the following best describes this concept?

• A. A point along the wing chord line where lift is concentrated.
• B. The location where drag is maximized.
• C. The midpoint of the wing's chord.
• D. The aerodynamic center of the wing.

Answer: (A)

The center of pressure is the point along the wing’s chord line where the total lift force can be considered to act. In other words, if you collapse the wing’s distributed lift into a single resultant force, its line of action passes through the center of pressure. This point isn’t fixed; it moves with changes in angle of attack, airspeed, and airfoil shape because the pressure distribution over the wing changes.

It’s not about where drag is maximized, nor is it simply the midpoint of the chord. It also isn’t the aerodynamic center, which is a different reference point tied to how moments change with lift. The key idea is that the center of pressure represents where the overall lift acts, and its position varies with flight conditions.