b747-400 dump rate
At what rate does a 747-400 dump fuel ? (kg/second, or any other units for that sake)
i have had the misfortune to carry this out. with six (ovrrd/ jett) pumps going, the rate was 1000kg/min.
it depends on the no. of pumps running. and of course the burn off at the moment.
i also discovered that it does not take care of fuel imbalance! no, it was not because it came from the dead engine tank!
and oh, er, it does not take 90 seconds to register the 'jettison time'. the moment you push the nozzle buttons, it will give the time to go, and it changes as you go into a bank.
as a point for the academics,the jett time deferred greatly from the book figures. operationally, might be better to give the time reqd after you have hit the two nozz buttons.