As the CG moves aft, an aircraft becomes:

When the center of gravity (CG) of an aircraft moves aft, it affects the aircraft's stability and control characteristics. An aft CG tends to make the aircraft less stable because stability is often linked to the position of the CG relative to the aerodynamic center. With a rearward CG, the aircraft tends to be more prone to pitch oscillations, leading to a reduced margin of stability.

The aircraft becomes less controllable with an aft CG because the control surfaces may not have the necessary effectiveness to manage changes in pitch attitude effectively. This can result in situations where the aircraft reacts sluggishly to control inputs, making it more challenging for the pilot to maintain desired flight attitudes and perform maneuvers safely.

Understanding this dynamic is crucial for safe piloting, as an aft CG can also lead to a tendency for the aircraft to stall at higher airspeeds, making an understanding of weight and balance essential in flight planning. Proper loading and weight distribution are critical to ensure that the CG remains within safe limits, enhancing both stability and control during flight.