What is the purpose of an aircraft loading graph?

The purpose of an aircraft loading graph is to ensure that the load distribution within the aircraft maintains the center of gravity (C.G.) within specified limits. The C.G. is crucial for flight stability and control; if it moves outside of allowable limits, it can significantly affect the aircraft's performance and safety.

By using a loading graph, pilots and ground crew can visualize how the placement of cargo, passengers, and fuel affects the aircraft's overall balance. The graph assists in determining how much weight can be added or how it can be distributed to keep the aircraft in a safe operational configuration. This ensures that the center of gravity stays within the manufacturer's defined parameters, ultimately leading to safe and efficient flight operations.

The other options do not relate to the primary function of a loading graph. Speed visualization, fuel consumption rates, and maximum altitude are handled through different instruments and calculations in aviation, making them irrelevant to the loading graph’s purpose.