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Date: Fri, 29 Jun 2001 08:41:43 -0700
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To: Lancair Mail List List <lancair.list@olsusa.com>
Subject: LNC4 Fuel Return 
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          <<  Lancair Builders' Mail List  >>
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>>
A couple of questions have been raised about the wisdome of using a fuel return
(returning warm fuel) to the ferry tank in the back seat.
Can anybody explain to me the purpose of having a fuel return? Some LNC4's
don't.
What is the fuel return for anyway?
Is it necessary for a temporary installation?
Brent S.


[The fuel return comes from the regulator that manages the fuel pressure for
the fuel injection system.  The accepted practice is to send the returning
fuel to the source tank to cut down on the fuel management task.  I don't know
of any fuel injected systems that don't use some sort of fuel return.  The
Andair valve switches both the source and return lines so the return to
the source tank is automatic.  If you choose to use a single return
to a single tank then that tank will have to be flown off a bit first to
make room for the fuel that will be transferring out of the active tank
and back into the return tank.  Additionally, don't forget that your
ferry tank is going to have to be electrically bonded into your ground system
to dissipate any static buildup.  Talk to Fred Moreno for sure about this
activity, as he seems to have spent the most time working on these kinds
of fuel systems for the LIV and LIVP.

    <Marv>       ]


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