What is a "CG envelope" in aviation?

A CG envelope represents a graphical representation of acceptable center of gravity (CG) positions for safe operation of the aircraft. This diagram outlines the different limits within which the CG must remain to ensure stability and control during flight. It typically displays a range that varies with the aircraft's weight and configuration, indicating the limits for the forward and aft CG locations. The importance of maintaining the CG within this envelope lies in its direct impact on aircraft performance, including stability, control, and overall safety.

Understanding the CG envelope is crucial for pilots and ground personnel, as exceeding these limits can lead to unsafe flight characteristics, such as reduced control response or an increased risk of stalling. The other options do not accurately reflect the function of the CG envelope; while they relate to aircraft weight management and operations, none serve the specific purpose of visually communicating the acceptable CG positions.