The moment coefficient for a thin cambered airfoil about the leading edge is given by______(a) cm,le=-0.5π(2A0+A1)(b) cm,le=-π(A0+A1+A2)(c) cm,le=-0.5π(A0+A1-0.5A2)(d) cm,le=-π(2A2+A1)This question was posed to me in exam.This intriguing question comes from The Cambered Airfoil topic in chapter Incompressible Flow over Airfoils of Aerodynamics

The moment coefficient for a thin cambered airfoil about the leading e

1.	The moment coefficient for a thin cambered airfoil about the leading edge is given by______(a) cm,le=-0.5π(2A0+A1)(b) cm,le=-π(A0+A1+A2)(c) cm,le=-0.5π(A0+A1-0.5A2)(d) cm,le=-π(2A2+A1)This question was posed to me in exam.This intriguing question comes from The Cambered Airfoil topic in chapter Incompressible Flow over Airfoils of Aerodynamics
Answer» CORRECT choice is (c) cm,le=-0.5π(A0+A1-0.5A2) To explain I would say: The moment COEFFICIENT for a thin, cambered airfoil about the LEADING edge is given by cm,le=-0.5π(A0+A1-0.5A2). We can verify that for a symmetric airfoil A1 and A2 are both zero giving the moment coefficient about the leading edge for a symmetrical airfoil, which is not satisfied by other OPTIONS.

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