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The position of the center of pressure at a positively shaped profile...

  • A

    moves to the leading edge while the angle of attack becomes smaller.

  • B

    is located at approximately 25% of the chord, measured from the leading edge.

  • C

    moves to the trailing edge while the angle of attack becomes smaller.

  • D

    does not move since it is independent of the angle of attack.

Refer to figure.
Angle of Attack (AoA) is the angle between the chord line of the wing and the direction of the relative wind.

Chord Line is an imaginary straight line drawn between the leading edge and the trailing edge of an aerofoil, in the direction of the normal airflow.

Center of Pressure (CP) is the point along the Chord line of an airfoil at which all aerodynamic forces (lift forces) are considered to act.

The Centre of Pressure of a cambered aerofoil moves forward as the Angle of Attack increases and backwards to the trailing edge as the Angle of Attack decreases.

The CP of a symmetrical aerofoil does not move under the influence of Angle of Attack almost at all.

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