MFS, your recent post:
"I think this unusual A320 effect has been discussed here before. On most aircraft you'd get to that "no more use moving the cg aft" state only if you'd already effectively eliminated the tail trim lift and moving further aft led to an increase in trim forces instead. That would be an awfully far aft cg in most cases."
I tried a pprune search, but haven't found any discussion of A320 wing unusual C of G drag considerations. Can anyone?
Secondly, while remaining within the certified CG envelope, is it really possible to move the cg aft to the point that the trim drag has been eliminated, or even starts INCREASING? Surely at this point we would be talking unstable flight characteristics where computers would continually be making fine adjustments to the pitch in order to keep the aircraft under control, as in F16 and other fighter designed to be manoeurrable but not stable.