Milt,thanks for the lesson in fuel systems. In a 767/747 there will always be around 100kg/litres of unuseable fuel or more after the boost pumps run dry and other large airliners would be the same.
Kerosene is very effective lubricant for the pump and it would have to be pumping 100% water for some time to effect the low pressure boost pumps in the tank.
Fuel would also go through at least 1 fuel/oil heat exchanger on any modern airline engine which along with cooling the oil ,heats the fuel to to assist in atomistion of fuel in the combustion chamber and eliminate any problems of icing in the fuel.
I work in a warm environment but I am not aware of any problems from water condesation that modern fuel systems in airliners combined with regular fuel drain checks by maintenance won't overcome. The only problems I have heard of is fuel that has been contaminated by water prior to uplift to the aircraft which is a different issue.
Milt what Aircraft has fuel filters that seperate water?? There are many air filters that seperate water but I haven't heard of a fuel filter.How does it work???
Last edited by numbskull; 16th March 2005 at 09:42.