Captain of a C150 me thinks. Its interesting to read the speculation on the A300-600 fuel system here, regarding fuel in vertical stab. What baloney.But it shows even the ignorence that exists on this site, even within groups of "informed" individuals.
The fuel on the A300/310 is in the horizontal stab, and is transfered back, after the aircraft climbs through 22000'.No fuel is contained in the trim tank (during refuel)until total fuel onboard exceeds 36000kg.
And yes they do have very big rudders, 'cos ulike your C150, Captain, theres a hell of alot of yaw if one of those very big engines were to go pop.