Why are weight and balance calculations essential before flight?

• A. To determine fuel efficiency.
• B. To ensure stability and controllability throughout the flight and to prevent CG from exceeding limits.
• C. To schedule maintenance.
• D. To comply with privacy laws.

Answer: (B)

Weight and balance calculations focus on where the load sits in the airplane relative to the wing and the total weight. That position—the center of gravity—determines how the aircraft will respond to control inputs and how stable it will be in flight. The airplane must stay within the approved weight and CG limits because those limits are set to guarantee predictable handling and safe margins from stall, spin, and loss-of-control scenarios.

If the center of gravity is too far forward, the aircraft becomes more statically stable but harder to rotate and pitch up, requiring more elevator input and generally reducing climb performance. It can also raise the stall speed, making landings and takeoffs more demanding. If the center of gravity is too far aft, the airplane becomes less stable and more sensitive to pitch changes, making it easier to overstress or stall and harder to recover from unusual attitudes.

Because fuel burn, passenger movement, and baggage shifts change the weight distribution during flight, confirming the weight and balance before departure ensures the aircraft remains within safe limits throughout the flight. It’s about safe, predictable handling, not fuel economy, maintenance scheduling, or privacy concerns.