What is the optimal CG positioning for fuel efficiency?

The optimal center of gravity (CG) positioning for fuel efficiency is near the aft limit of the aircraft. This positioning allows for better aerodynamic performance. When the CG is located towards the aft limit, it can reduce drag by allowing the aircraft to maintain a more level flight attitude, often leading to less power required from the engines and improved fuel consumption. An aft CG can also enhance the aircraft's stability and maneuverability, potentially resulting in a more efficient flight profile.

In general, balancing CG within specific limits is essential for flight safety and performance. While positioning at the nose may improve visibility and stability, it can lead to increased drag and less efficient fuel usage. The middle of the wings, while sometimes advantageous for weight distribution, doesn’t necessarily optimize overall fuel efficiency. Being just behind the center of gravity typically does not provide the same aerodynamic benefits that positioning nearer to the aft limit would achieve. This makes near the aft limit the most advantageous option for optimizing fuel efficiency.