airfoilmod:
If it was that simple, then of course Boeing and Airbus and uncle Tom Cobley and all would have done it years ago. The flaw in your idea is that with the C of G so far aft the aircraft would be unstable in pitch to the extent that it would be unflyable without an autostab. That device would be critical to the safety of the flight regime, so it would need at least triple redundancy...................... and so we go on.