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If moment coefficient about aerodynamic centre of wing is -0.216 and lift coefficient of wing is 1.2. Find moment coefficient about cg. Given cg location as Xcg = 0.3.

If moment coefficient about aerodynamic centre of wing is -0.216 and lift coefficient of wing is 1.2. Find moment coefficient about cg. Given cg location as Xcg = 0.3. Correct Answer -0.156

Moment coefficient about CG = Moment coefficient about aerodynamic centre of + (wing lift coefficient*) = -0.216 + (1.2) = -0.156.

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