Why is it critical to account for weight when determining the CG of an aircraft?

Accounting for weight when determining the center of gravity (CG) of an aircraft is essential because it directly impacts flight stability and control. The CG is the point where the total weight of the aircraft is considered to be concentrated, and its position influences how the aircraft behaves during flight.

When the CG is located within the prescribed limits, the aircraft will exhibit stable flight characteristics and respond predictably to control inputs. If the CG is too far forward or too far aft, it can lead to undesirable flight properties, such as instability, difficulty in controlling the aircraft, or excessive nose-up or nose-down attitudes. This can significantly affect the aircraft's maneuverability, performance, and safety.

Understanding the relationship between weight and CG helps pilots and engineers ensure that the aircraft operates effectively, maintaining balance and control throughout various phases of flight. This consideration is crucial for both operational efficiency and the safety of flight operations.