Which statement about climb performance and weight?

• A. Heavier weight increases climb gradient
• B. Heavier weight has no effect on climb gradient
• C. Heavier weight reduces climb gradient
• D. Heavier weight only affects cruise, not climb

Answer: (C)

Weight affects climb performance because climb gradient is tied to the amount of power (or thrust) you have available after overcoming the drag required to fly at that weight. When the aircraft is heavier, it needs more lift to stay level, which increases induced drag, and it also demands more overall thrust to maintain climb. With a finite power or thrust available, the extra load reduces the excess power that can be converted into climbing energy. That means the aircraft can gain less altitude per unit of forward distance, so the climb gradient becomes shallower. In short, heavier weight reduces climb gradient because it lowers the surplus power available for climbing. The other ideas don’t fit because they would imply more capability with more weight, no effect at all, or that weight only matters in cruise, which isn’t true since climb performance depends on the same power–weight balance.