What is a critical condition for safe aircraft operation regarding weight distribution?

The correct choice highlights that a center of gravity (CG) positioned too far aft can lead to significant control issues for the aircraft. When the CG is too far back, it affects the aerodynamic stability of the aircraft. This can cause a situation known as "pitch instability," where the aircraft becomes difficult to control during maneuvers. The wings may have a lesser angle of attack in relation to the airflow, increasing the risk of stalls during flight, particularly at lower speeds. Essentially, the aircraft may be prone to excessive pitch movements, making it challenging for the pilot to maintain a steady attitude.

In contrast, a CG that is too far forward, while it may not be ideal, may still allow for safe operation and can even enhance the stability of the aircraft. A CG located at the center of pressure is more theoretical in an ideal scenario; however, in reality, such a balance is difficult to achieve with varying load conditions. Lastly, the statement regarding CG placement having no effect on flight is inaccurate, as the position of the CG fundamentally affects the aircraft's performance, handling, and overall aerodynamics. Understanding and managing CG is critical for ensuring safe and effective aircraft operation in all flight conditions.