I know nothing about the practicalities of a/c fuel loading, so forgive me if I've missed a critical assumption or two, but ST's example above seems a little odd.
A fuel tank described as having "500kg" capacity is the problem.
Tanks have volumes, not weights. The "500kg" description would be a nominal one based on the tank volume and a nominal fuel density. If the tank was "brimmed", then the weight carried would be the tank maximum volume [multipled] by the fuel density.
If it was brimmed with a different density fuel, then the mass would change but the volume would not.
However, if the tank was loaded using some kind of mass flow meter to ensure that 500kg was loaded, then the example 625/617 litre thing would happen, provided the maximum tank volume was greaterr tha nthe fuel loaded, obviously.
But, my understanding from prior posts is that fuel bowsers dispense by volume, not by mass?
Confused, I am.
Edit: So confused that I can't tell my multiplies from my divides. oops.
Last edited by David Bass; 4th Jan 2014 at 17:37.