What does "Vmc" stand for in aviation?

"Vmc" stands for "minimum control speed in the event of an engine failure on a multi-engine aircraft." This critical airspeed is essential for pilots to understand, as it denotes the lowest speed at which an aircraft can maintain controlled flight after one engine has failed.

When an engine fails, the aircraft will tend to yaw towards the inoperative engine due to the loss of thrust on that side, which can lead to a loss of control if the speed drops below Vmc. Understanding this concept is vital for safe multi-engine operations, as it ensures that pilots maintain sufficient airspeed to operate effectively and safely, allowing them to counteract the asymmetrical thrust and maintain straight and level flight.

The significance of Vmc cannot be overstated, as it plays a crucial role in flight planning and emergency procedures for pilots operating multi-engine aircraft. It helps pilots determine the minimum safe speed to fly after losing an engine, allowing them to maintain control of the aircraft and execute necessary procedures safely.