Randy, I am using the Andair valve that returns the fuel to the tank you are
pulling from.  Simplifies the problem.

If you are using the fuel pumps that Tracy supplies, you do not need check
valves as they have them inside.  You will need filters after each pump
though.  If either of the pumps craps out, it will fill the injectors with
residue and you will not then need the spare pump.

Bill B

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of randy echtinaw
Sent: Tuesday, December 02, 2008 6:59 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