What is the most common reason to use ballast in weight and balance?

• A. To bring the CG within prescribed limits when load distribution is too far forward or aft.
• B. To increase overall weight.
• C. To balance fuel consumption.
• D. To reduce drag.

Answer: (A)

The main idea here is center of gravity management. Ballast is used to adjust where the aircraft’s weight is concentrated so the CG stays within the approved limits as loading changes. When passengers, crew, baggage, or cargo are loaded in a way that pushes the CG too far forward or too far aft, stability and controllability can be affected. By placing ballast at a specific location, you shift the CG back toward the center, bringing it into the permitted range and preserving safe handling for takeoff, flight, and landing. This is why ballast is commonly used—it's a practical tool to ensure the aircraft remains within its weight-and-balance envelope despite real-world loading variations. It’s not primarily about increasing total weight, balancing fuel consumption, or reducing drag.