What is the purpose of a weight vs. CG graph?

The purpose of a weight vs. CG (center of gravity) graph is to illustrate the relationship between the weight of an aircraft and the location of its center of gravity. This graph is essential for pilots and engineers to ensure that the aircraft is loaded within safe limits and that the center of gravity remains within specified boundaries during flight operations.

Understanding this relationship helps maintain aircraft stability, control, and performance. If the center of gravity is too far forward or too far aft, it can lead to undesirable flight characteristics, making the aircraft difficult to control or affecting its aerodynamic efficiency. By using the weight vs. CG graph, operators can visualize how changes in load (like passengers, cargo, and fuel) will affect the balance and handling characteristics of the aircraft.

The other choices do not align with the primary function of a weight vs. CG graph and do not contribute to safe aircraft operation or performance analysis in the same way.