And, if we sit back in the smoking chair and contemplate the matter over a wine .. why are we launching at minimum speeds ? If the runway is longer than needed and it is just a case of low weight .. why not adopt an appropriate higher speed schedule and avoid most of the worry ?
A valid question indeed. Backstory may be helpful. This thread was spawned from the thread cited below, from the Private Pilot forum. I think reference to that thread may prove illuminating.
http://www.pprune.org/forums/showthread.php?t=325406
The original poster would appear to be asking about Vmc, rather than Vmcg, but goes on to postulate that as directional control may not be available on the ground after an engine failure, he sees no reason why one should not take off below Vmca.