Read again what I said a couple of posts ago:
QUOTE]Just to round things off, the complete aircraft (tail on) aerodynamic centre will be around 50~55% mac so the aircraft would be stable even at the aft CG limit (as it must be of course to meet regulations)
Not much to be doing with failure modes either - if the CG is ahead of the aerodynamic centre the aircraft will be statically stable whatever the FBW is doing.
[/QUOTE]
I think we are in agreement Owain.
However, reading some of the other posts here (and elsewhere) the suggestion by some is that the CofG maybe AFT of MAC.
It can be so for certain high performance a/c but not air transport catagory.
Failure modes have to be taken into account. Unfortunately, things go wrong.
In an ideal world all a/c would be designed with all surfaces lifting (Canard?) but we are not in that world.
Good thread this.
