How does having the centre of gravity located aft affect take-off performance?

How does having the centre of gravity located aft affect take-off performance?

• A. Increases ground roll distance and climb gradient.
• B. Reduces ground roll distance and climb gradient.
• C. Increases ground roll distance and lowers climb gradient.
• D. Reduces ground roll distance and increases climb gradient.

Answer: (D)

Having the center of gravity (CG) located aft has a significant impact on an aircraft's aerodynamic performance during take-off. When the CG is positioned towards the rear, it can lead to improved overall performance characteristics. An aft CG tends to reduce the aircraft's static stability, thereby making it more responsive in terms of control. This enhanced control allows for a smoother and shorter ground roll during take-off, as the aircraft can achieve sufficient lift more quickly due to an increase in the angle of attack. Additionally, with a more favorable lift-to-drag ratio resulting from the CG's position, the aircraft can climb at a steeper angle once airborne. As a result, the reduced ground roll distance means the aircraft can take off in a shorter distance, while the increased climb gradient allows the aircraft to climb more effectively, clearing obstacles in its flight path sooner. This combination enhances overall take-off performance, demonstrating why having an aft CG is beneficial in this context.

Having the center of gravity (CG) located aft has a significant impact on an aircraft's aerodynamic performance during take-off. When the CG is positioned towards the rear, it can lead to improved overall performance characteristics.

An aft CG tends to reduce the aircraft's static stability, thereby making it more responsive in terms of control. This enhanced control allows for a smoother and shorter ground roll during take-off, as the aircraft can achieve sufficient lift more quickly due to an increase in the angle of attack. Additionally, with a more favorable lift-to-drag ratio resulting from the CG's position, the aircraft can climb at a steeper angle once airborne.

As a result, the reduced ground roll distance means the aircraft can take off in a shorter distance, while the increased climb gradient allows the aircraft to climb more effectively, clearing obstacles in its flight path sooner. This combination enhances overall take-off performance, demonstrating why having an aft CG is beneficial in this context.