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A constant speed propeller maintains

  • A.A constant torque regardless of speed
  • B.A constant thrust at all airspeeds
  • C.A selected rotational speed by varying the blade angle
  • D.A fixed blade angle whatever the power

Answer: C

The governor senses speed and adjusts blade pitch to load or unload the engine as required. Holding the speed constant is what makes torque a direct measure of power, which is why turboprops are set on torque rather than on rpm.

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