In weight and balance calculations, why is it essential to account for fuel burn?

In weight and balance calculations, accounting for fuel burn is crucial because it directly affects the aircraft's weight and moment. As fuel is consumed during flight, the overall weight of the aircraft decreases, which can influence various performance aspects, such as climb rate, stall speed, and fuel efficiency. Additionally, since fuel is typically located in specific parts of the aircraft (usually in the wings or fuselage), its burning changes the distribution of weight, known as the aircraft's moment. This shift can impact the center of gravity (CG), which is critical for ensuring that the aircraft remains within acceptable limits for safe flight operations. Properly balancing the aircraft by adjusting for fuel burn ensures safe handling and adheres to regulatory requirements for safe flight. Understanding these dynamics is essential for pilots to maintain control and performance throughout the flight.