Private Pilot License (PPL) Aerodynamics Practice Exam

What undesirable flight characteristic might a pilot experience if the CG is located aft of the aft CG limit?

1. Increased fuel efficiency

2. Improved climbing ability

3. Difficulty in recovering from a stalled condition

4. Enhanced stability during turns

The correct answer is: Difficulty in recovering from a stalled condition

When the center of gravity (CG) is located aft of the aft CG limit, it can significantly impair the aircraft's handling characteristics. One of the most critical consequences of this situation is the difficulty a pilot may encounter in recovering from a stall. In an aircraft with an aft CG, the pitch stability is reduced, meaning that the aircraft may not respond as effectively to control inputs, particularly when trying to regain control after a stall. An aft CG can lead to a reduced effectiveness of the elevator and an increased likelihood of a deeper stall, making it harder to recover. This lack of stability can cause the aircraft to enter a progressive pitch-up condition which exacerbates the stall, making recovery challenging. Furthermore, with the CG further back, the pilot may have to exert more effort to maintain control and prevent the nose from rising excessively. Consequently, pilots of aircraft with an aft CG need to be particularly vigilant about stall awareness and recovery techniques to mitigate the associated risks. Recognizing and understanding the impact of CG location is crucial for ensuring safe flight, especially in critical phases of flight such as takeoff and landing.