Originally Posted by
bbrunton
Unless the aircraft has been sitting motionless for several hours you will not get any water out even if it is in there. It takes several hours for the water to settle.
I once thought this. Then I saw a demonstration with Jet A and water in a mason jar at FSI Wichita. Although water doesn't "fall out" as quickly as it does with 100LL, it does separate about as quickly as vegetable oil and water. Less than 5 min after shaking the jar, you could see a definable line of separation.