The coefficient of moment about the quarter chord is zero for a symmetric airfoil. This implies____(a) Quarter-chord is the center of pressure(b) Quarter-chord is the center of mass(c) Quarter-chord has zero forces acting on it(d) Total lift is zero at quarter-chordI got this question by my school principal while I was bunking the class.Question is taken from The Symmetric Airfoil in division Incompressible Flow over Airfoils of Aerodynamics

The coefficient of moment about the quarter chord is zero for a symmet

1.	The coefficient of moment about the quarter chord is zero for a symmetric airfoil. This implies____(a) Quarter-chord is the center of pressure(b) Quarter-chord is the center of mass(c) Quarter-chord has zero forces acting on it(d) Total lift is zero at quarter-chordI got this question by my school principal while I was bunking the class.Question is taken from The Symmetric Airfoil in division Incompressible Flow over Airfoils of Aerodynamics
Answer» CORRECT choice is (a) Quarter-chord is the center of pressure To elaborate: The coefficient of moment about the quarter chord is ZERO. By definition, the center of pressure is the point about which the total moment is zero. HENCE, quarter-chord is the center of pressure for the symmetric AIRFOIL. Other statements cannot be said conclusively with the given information.

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