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The stalling speed of an aeroplane will be highest when it is loaded with a:
  • A
    low gross mass and aft centre of gravity.
  • B
    high gross mass and aft centre of gravity.
  • C
    high gross mass and forward centre of gravity.
  • D
    low gross mass and forward centre of gravity.

Stall speed increases as weight increases, since wings need to fly at a higher angle of attack to generate enough lift for a given airspeed.

The increase in load factor in a turn also increases stall speed; in a level, 60˚ bank turn, for instance,the effective weight on the wings doubles and stall speed increases by about 40 percent. And wing contamination such as frost or ice can reduce the amount of lift produced by the wing, also raising the stall speed.

When the Center of gravity is at or outside the forward limit, this gives us a pitch down moment, this pitch down moment has to be corrected by an up deflection of elevator to keep straight and level flight,
this up deflection increase the drag, increasing drag reduces the endurance, increases the stall speed.

Correct Answer: high gross mass and forward centre of gravity.

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