Ernesto Sanchez wrote:

One way to plumb a fuel return is through a duplex valve.  See this site:
http://www.andair.co.uk/

When you switch tanks the return line is also switched.  ACS carries these
valves now.

Another way is to put an electric pump in each tank and using a regular
valve to redirect the returned fuel (switch pump #1 on, valve pointing to
tank #1). This way you can balance your fuel load too (valve redirecting
returned fuel to lighter tank).  On this system, I would put a balance tube
that connects both tanks that is approximately 1' down from the tops of both
tanks so you can not over fill a tank and pump the returned fuel out the
vents in case you forgot to switch the return.

Another option is a sump as seen at this page:
http://www.sdsefi.com/air27.htm

This shows the return to a common sump.  I think Berkut uses this system.

Ernesto Sanchez
E-Racer 319
es12043@utech.net

 
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