How does center of gravity location affect true airspeed (TAS)?

The correct answer highlights that the position of the center of gravity (CG) can influence true airspeed (TAS) in a specific manner. When the CG is located further aft (toward the tail) in relation to the aircraft's mean aerodynamic chord, it can result in a decrease in drag during flight. A more optimally balanced aircraft may have a higher lift-to-drag ratio, leading to more efficient airflow over the wings and subsequently allowing the aircraft to achieve a higher TAS at a given power setting.

This phenomenon occurs because an aircraft with an aft CG may require less control surface deflection for level flight and may also achieve a better performance during cruise conditions. The relationship between CG position and performance metrics such as TAS is crucial for pilots to understand, particularly when loading an aircraft for flight.

In contrast, center of gravity location does indeed have implications beyond just TAS, influencing stability, control, and overall aircraft performance. While altitude and environmental factors can impact TAS due to atmospheric density, the position of the CG plays a direct role in the aircraft's aerodynamic efficiency, which influences cruising speeds and fuel consumption.