> Subject: [FlyRotary] Re: Sump tank
>
>
> > Posted for "Tommy James" <twjames@healed.org>:
> >
> > Hi Paul,
> > To me this would be a question of temperature and pressure.  If the fuel
> can
> > cool down in the sump that would be better than running all the way back
> to
> > a tank.
> > What happens, pressure wise, when the 2 gallon sump fills up?  Actually,
I
> > don't think it would be a problem, but an item to consider any way.
> > The surest way is to run the overflow back to a main tank.  Why did you
> > choose a 2 gallon sump?
> > Regards,
> > Tommy James<><
> >
> Hi, Tommy....thanks for the reply. I chose the 2 gallon sump tank because
> Velocity uses it in their retract aircraft, and it will fit behind my rear
> seat back and just forward of the main gear. Not much room there for a
> larger sump tank.  I am also toying with the idea of not using a sump tank
> at all, and just having the fuel return to the left main tank, which I
will
> make my "primary" tank for takeoff and landing etc.  Paul Conner
> > >>  Homepage:  http://www.flyrotary.com/

Now you're talk'n.  I hate sump tanks.  The only advantage to having one is
to eliminate having to install a fuel return line to the main tank.  Not a
good enough reason.

But don't even think about running off the right tank while returning fuel
to the left.  It is a fuel management nightmare.  Just feed from the left
all the time and transfer fuel from right to left with a small facit fuel
pump.  Throw away your fuel selector valve.

Tracy Crook