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An aircraft's minimum control speed on the ground is found to be higher than the target takeoff safety speed.

Which change most directly reduces it?

  • A.Increase the wing area
  • B.Move the engines further outboard
  • C.Increase the rudder area or deflection limit
  • D.Increase the tailplane area

Answer: C

The minimum control speed falls when the rudder can balance the asymmetric moment at a lower dynamic pressure, so more rudder power is the direct lever. Moving engines outboard increases the moment and makes the problem worse.

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