Originally Posted by
bean
Severely damaged aircraft with flight control issues. Different scenario
Correct, and if you think about it; dumping fuel on a 747 would reduce your aircraft weight by about 2 tons per minute provided there is fuel in the centre tank. (without centre tank fuel that rate will be a lot less). So you would lose only a bit more than 1% of weight per minute on a MTOW 747. Aerodynamically not much will happen unless you have plenty of time to dump and lose at least, let's say 10% of your aircraft weight...