@TurbineD thanks for the link to
http://www.smartcockpit.com/data/pdf...For_Pilots.pdf
there is a graphic for whigt and balance (CG limits) on s.10
the range for an A330-200 with 210t is from 17 to 39%
there is no advice that the stability is badly different in this range...
and no advise what is the most stable position of CG (24...26% ???)
• No crew action is required for normal operation except initiation and termination ( s101)
and s.101ff........
• Abnormal operations :
- forward and (some) inter tank transfers may be initiated manually
so forward transfer of fuel will be possible even without the use of the gravity
- Fuel transfer from the trim tank to the inner tanks is performed by the trim tank forward transfer pump through the trim pipe isolation valve (s.97)
again, I am wondering why one can not just switch the system between economical (aft CG) and most save flying (CG=25%) for turbulent weather......