What is the effect of moving the centre of gravity from the forward to the aft limit?

Moving the centre of gravity from the forward limit to the aft limit typically decreases induced drag and reduces the power required for flight. This is because an aircraft with its centre of gravity positioned more aft can achieve a more efficient aerodynamic profile.

When the centre of gravity is further aft, the aircraft often requires a lower angle of attack to maintain level flight and to generate sufficient lift. This lower angle of attack translates to reduced induced drag, which is a type of drag that occurs due to lift generation. As induced drag decreases, the power needed from the engines to maintain flight is also reduced, allowing for a more efficient operation, particularly in cruise conditions.

In terms of aircraft handling, an aft centre of gravity can lead to improved performance characteristics, such as increased stability in some flight regimes, but it is important to remain within the manufacturer's specified limits to ensure safe operation and avoid potential control issues.