Why is weight and balance important in multi-engine operations?

Weight and balance are critical factors in multi-engine operations because they directly influence the aircraft's performance and handling characteristics. Ensuring that the aircraft is within its weight limits and properly balanced helps maintain stability and controllability throughout all phases of flight. This is especially vital in engine-out scenarios, where one engine may fail. The aircraft's center of gravity, which can shift based on weight distribution, plays a significant role in how the aircraft responds to inputs from the control surfaces. If the aircraft is not properly balanced, especially during an asymmetric thrust condition, it can lead to loss of control or inability to maintain altitude.

In scenarios where one engine is not producing thrust, an imbalanced aircraft can cause excessive yaw and roll towards the inoperative engine, making recovery difficult. Therefore, thorough weight and balance calculations ensure that the aircraft can safely manage such emergencies, making this aspect of flight planning essential for safe multi-engine operations.