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In the Fourier solution of thin airfoil theory, the coefficient conventionally written as A zero depends on

  • A.The Reynolds number of the flow
  • B.The trailing-edge angle only
  • C.The angle of attack and the camber line slope
  • D.The airfoil thickness distribution only

Answer: C

The leading coefficient is the angle of attack less the mean of the camber-line slope taken over the chord. It is therefore the only coefficient that changes when the airfoil is rotated, and everything about how lift responds to incidence follows from it. Thickness plays no part anywhere in the theory.

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