What is the Minimum Control Speed Ground (Vmcg)?

The Minimum Control Speed Ground (Vmcg) refers to the minimum speed at which an aircraft can maintain directional control with all wheels on the runway during the takeoff roll, even in the event of an engine failure. It is a critical parameter for pilots as it dictates the lowest speed at which the aircraft can safely reject a takeoff or stop without losing control.

At or above this speed, the aircraft has sufficient control authority to counteract the yawing moment caused by an engine failure, allowing the pilot to either continue the takeoff safely or stop within the available runway distance. Knowing this speed helps pilots make informed decisions during the initial phase of takeoff, ensuring safety and preventing potential accidents due to loss of control.

In contrast, the other options do not accurately define Vmcg. The second choice pertains to landing speeds, while the third addresses the inability to maintain directional control, which is essentially the opposite of what Vmcg represents. Lastly, taxi speeds relate to ground movement and do not pertain to the control capabilities required during takeoff.