What does VMCG stand for in relation to multi-engine aircraft?

VMCG stands for "Minimum Control Speed on the Ground." This term is critical for multi-engine aircraft as it refers to the minimum speed at which the aircraft can lose an engine and still maintain directional control during the takeoff roll. Knowing VMCG is essential for pilots and engineers as it helps in assessing the aircraft's performance during critical phases of flight, particularly during takeoff when engine failures are a concern.

The concept behind VMCG is that, below this speed, the aircraft may not have sufficient airflow over the control surfaces to counteract the yawing moment created by an engine failure. Understanding this speed is vital for safe operations, ensuring that pilots are aware of the risks involved and the necessary actions to maintain control. This knowledge is integral to training and flight planning for multi-engine operations.