After using 30 gallons of fuel in flight, will the CG remain within limits if the initial conditions were within limits?

To determine whether the center of gravity (CG) will remain within limits after using 30 gallons of fuel, it is essential to consider how fuel weight and location affect the CG position.

Initially, if the conditions were within limits, this indicates that the CG was balanced considering the weight of the aircraft, passengers, cargo, and fuel load. During flight, as fuel is consumed, the overall weight of the aircraft decreases, but where that weight is located is crucial for maintaining CG limits.

Typically, fuel is located near the center of the aircraft, meaning that as fuel burns off, it alters the load distribution but generally not in a way that would push the CG beyond the established limits, especially if the initial CG was within specifications. The assumption is that given the aircraft design, the burn-off of fuel has been accounted for in the performance calculations.

If the remaining fuel still allows the CG to stay balanced between the forward and aft limits, then it is reasonable to conclude that after consuming the fuel, the CG will still remain within limits. Therefore, the fact that the initial conditions were acceptable supports the conclusion that the CG will likely remain within limits after the fuel is used.