Originally Posted by
24Carrot
How long after refuelling do you have to wait for the water to settle, so you can remove the water, or at least test for the presence of the first to settle out?
During my PPL I was told there was no point checking if you re-fuelled just before flying. But I have always wondered...
I don't think that I've ever seen a definitive (=actually supported by some research) answer, but 20 minutes is often quoted.
G