Aeromodelling

Center of Pressure is a resultant point where the totals sum of all the pressures that produced on the aerofoil surface. And this pressure resultant point fall along the chord line.

The center of pressure for a flat plate or any symmetrical airfoil stay in one position at the chord line when change in angles of attack.

For a non-symmetrical airfoil, the center of pressure moves alone the chore line as changes in angle of attack.

when increase in angle of attack, the center of pressure moves forward

and the center of pressure moves backward when decrease in angle of attack.