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Which statement about the centre of pressure is FALSE?

  • A.It remains fixed at the quarter chord for a cambered section
  • B.It moves as the angle of attack changes
  • C.It recedes towards infinity as lift approaches zero
  • D.The whole resultant force may be taken to act through it

Answer: A

The fixed point at the quarter chord is the aerodynamic CENTRE, not the centre of pressure, and confusing the two is the classic error. The centre of pressure moves continually with incidence, which is why the other point is preferred.

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