Arm

Definition

The horizontal distance from the reference datum to the centre of gravity (CG) of an item.

The algebraic sign is plus (+) if measured aft of the datum or to the right side of the center line when considering a lateral calculation. The algebraic sign is minus (-) if measured forward of the datum or the left side of the center line when considering a lateral calculation.

Related Articles

Further Reading

ICAO Annex 8: Airworthiness of Aircraft.

US FAA Aircraft Weight and Balance

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