moment

Definition of “Moment” in Aeronautics

Moments in aeronautics refer to a calculation of weight and distance used to determine whether an aircraft is within its Center of Gravity (CG) limits. A moment is obtained by multiplying the weight of an item by its arm, which is the distance between the item and a reference point on the aircraft. The reference point varies from one aircraft to another.

The unit of measure for moments is pound-inches (lb-in). The total moment of an airplane is calculated by multiplying its weight by the distance between the datum (a reference point on the aircraft) and the CG.

Moments are a critical concept in aviation safety since they can affect the stability and control of an aircraft. If an aircraft’s CG is not within the prescribed limits, it can lead to instability during flight, making the aircraft difficult or impossible to control.

Therefore, moments are closely monitored and calculated during flight planning and maintenance checks to ensure the safety and stability of the aircraft. By understanding moments and their importance in aviation, pilots and maintenance personnel can maintain safe and efficient flights.