Jim Macklin wrote:

Vmcg is the speed where you can't maintain heading with the
critical engine failed and there is not enough rudder or
tire steering. Yaw is most severe at low speed because the
rudder is ineffective and some airplanes have steering
problems with tire geometry.

by the way, that's one of the things that MS FS gets
wrong with the light twins: with a long enough runway you
can takeoff with only one engine...

--Sylvain