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Regarding mass and balance calculations, the center of gravity is...

  • A

    the point on the longitudinal axis or its extension from which the centers of gravity of all masses are referenced.

  • B

    the point through which the force of gravity is said to act on a mass.

  • C

    the distance from the datum to the position of a mass.

  • D

    the product of mass and balance arm.

Refer to figure.
CENTER OF GRAVITY (C.G.)

The total mass of the aircraft can be said to act through one point, called the Centre of Gravity (C.G.). To ensure the aircraft is safe to fly, the center of gravity must fall within specified limits established by the aircraft manufacturer (between the front and the rear C.G. limit). The C.G. limits change with aircraft mass. Therefore, the center of gravity has to be calculated before each flight to make sure the aircraft within the safe envelope as exceeding limits can end up with danger, lower performance and fatalities. Proper C.G. location is crucial for maintaining the aircraft's stability and controllability.

  • The point on the longitudinal axis or its extension from which the centers of gravity of all masses are referenced. → Datum
  • The point through which the force of gravity is said to act on a mass. → Center of Gravity (C.G.)
  • The distance from the datum to the position of a mass. → Balance arm
  • The product of mass and balance arm. → Moment

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