How does the aircraft's weight affect its speed during constant power management?

The correct answer highlights a fundamental principle of flight dynamics related to the balance of weight, lift, and thrust. As the weight of an aircraft decreases, the lift required to keep it airborne is reduced. This change allows the aircraft to achieve a higher speed or altitude without needing to increase engine power proportionally.

In practical terms, with less weight, the aircraft requires a lower angle of attack to maintain level flight, which can lead to increased speed. Additionally, under constant power management—meaning that the power setting of the engines remains the same—the aircraft can accelerate or climb more efficiently as it becomes lighter. Therefore, as weight decreases, it becomes easier for the aircraft to gain speed or altitude due to the reduced demand for lift.

This principle is crucial for aircrew to understand, particularly during landing and takeoff, where weight management plays a significant role in performance. Understanding the relationship between weight and speed helps pilots make informed decisions about fuel load, cargo, and flight dynamics.