Al,
   That was my first thought to just drain the smaller tank into the larger with a simple 1/4 turn on/off but I would have to run the main  at least 1/2 empty for this to work. I cannot fly ackro with less than  6 gallons in the main tank. I cannot fly ackro at all with fuel in the smaller tank so by the time the smaller tank emptied I would have  little fuel remaining in the larger tank. I even considered a small  transfer pump to fill the larger tank but I am again creating  complexity.
All input here is welcome :))
Thanks,
---------------------------------

On Dec 2, 2008, at 7:39 PM, Al Gietzen wrote:

Randy;

Is the positioning of the tanks such that you could gravity feed the small
tank into the big tank? Then you could return to the larger tank - and
eliminate the selector valve.

Al G

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]  On
Behalf Of randy echtinaw
Sent: Tuesday, December 02, 2008 3:59 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Fuel system

Gentlemen,
  Because a large majority of homebuilt problems are fuel related I
am trying to make my system as simple as possible. This is a biplane
with a 20 gal. and a 10 gal. tank in front of the inst. panel, RX-8
engine.
The only "known" problem I have at the moment is my fuel return. I
would like it to return to the main tank only. This would mean burning
off 2-3 gallons from the main tank before switching to the 2nd tank.
But, this might mean I am setting myself up for a future "pilot error"
in fuel management. If I return to both tanks I would need another
selector and cockpit control which is making the system more
complicated and, again, potential "pilot error." So, suggestions . . .
Thank you very much,
Randy



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