Originally Posted by
Glowgeek
5" behind the CG seems way far back for the mains. The aircraft will likely not want to rotate on take off without a lot of speed and elevator, then all of a sudden leap off the runway risking a stall. With the mains that far behind CG it's doubtful moving the CG back will help much with taking weight off the NG but will certainly help with the landing speed envelope.
Like the space shuttle...that was meant to land only, and when static had a negative incidence on the aiirfoil, probably wouldn't rotate into flight easily.