Marvin Kaye wrote:
>
> Posted for John Overman <mooneydryver@yahoo.com>:
>
> Wouldn't you sump tank always be full until your mains
> run out ou fuel? And wouldn't the fuel returned always
> be less than is pumped out of the sump tank ie fuel
> returned equals fuel pumped out less fuel burned?
>                        John

You are right on all counts.
One advantage of having a sump tank is installing a sensor at its top
--- when that turns on (sound and a LED) you know that you have 2
gallons left to find a place to land -- or switch tanks.

Rino