Yes, 777fly, my outsider's view is showing its weaknesses.
The increase in volume of 4000Kg (about 320 - correction - 5000 litres) can only be supplied by adiabatic expansion if there is enough air in the tank to start with. If there is enough then there should be no contamination in the climb.
Edit3 - hope I'm on better form today ...
Tank capacity 100K litres, fuel upload approx 25k litres. Air to be expanded 75k litres. Expansion needed to replace fuel spent in the climb 5k litres. Estimate about 100mB (adiabatic) pressure change or 3000ft. There is an order of magnitude more air than needed to replace the fuel burned.
(OK - you professionals knew all this - I'm conceding as graciously as I can!)
Are the occasional 'water-in-fuel' warnings spurious? If not, 100+ gallons of water (and associated pollutants depending on where it came from) gets in some how.
NSEU may have exonerated the dirty snowman with his 400kg/hour scavenge rate for clean water. Could that cause the problem?
Last edited by Rightbase; 4th March 2008 at 16:13.
Reason: 1.dumb arithmetic mistake 2.inability to count zeros 3.more info