What effect does having the center of gravity (CG) at the aft limit have on performance characteristics?

• A. Increases stalling speed and decreases cruising speed.
• B. Decreases stalling speed and increases stability.
• C. Provides the lowest stalling speed and the highest cruising speed.
• D. Increases stability and reduces lift.

Answer: (C)

Having the center of gravity (CG) at the aft limit has a significant impact on an aircraft's performance characteristics, specifically contributing to lower stalling speeds and enhanced cruising speeds. When the CG is positioned toward the aft limit, it can lead to a condition known as reduced static stability. This lower stability often results in increased sensitivity to control inputs and a tendency for the aircraft to become more maneuverable.

When flying with an aft CG, the aircraft may be able to achieve lower stalling speeds because the wing's angle of attack can be optimized for better performance at slower speeds. This condition allows for a more efficient lift-to-drag ratio, which can increase cruising speeds as well. Therefore, the combination of achieving lower stalling speeds alongside potentially higher cruising speeds reflects how an aft CG can enhance the overall aerodynamic performance of the aircraft.

The implications of this position also underline the significance of understanding weight and balance, as having an aft CG can have adverse effects on handling characteristics, making it crucial for pilots to remain aware of their aircraft's configuration for safe operation.