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The fin contributes to the dihedral effect because

  • A.It has geometric dihedral
  • B.It is swept
  • C.It reduces the wing's lift
  • D.Its side force acts above the rolling axis

Answer: D

A side force generated above the aeroplane's centre of gravity produces a rolling moment as well as the yawing moment it is fitted for. The contribution is modest but it is one more link between the lateral and directional axes.

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