Va has to do with momentum.
It is easier to change direction of a moving object if it is lighter.
Therefore easier to overstress an airplane at lighter weights.
As far as CG is concerned, aft cg requires less downforce from the tail, therefore the airplane will fly with a lesser angle of attack, therefore it flies faster. It will also take more of a pitch change (=speed change) to reach the critical angle of attack in straight and level unaccelerated flight.
Forward CG> more tail down force necessary> flies at higher angle of attack> closer to critical angle of attack> higher stall speed in straight and level unaccelerated flight.
YEAH...apart from the alcohol induced spelling errors..pretty much ok I think..
