From: Dale Rogers <rogersda@cox.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Fuel System Question
Date: Tue, 29 Jun 2004 13:34:36 -0400
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Hi All,
 
> From: "Ron Milligan" <ronmilligan@cox.net>
> Date: 2004/06/29 Tue AM 01:01:22 EDT
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Subject: [FlyRotary] Fuel System Question
> 
>...  My
> question is, if I plumb the transfer line (one tank to the other) into the
> fuel return line (coming from the engine) will the facet fuel pump have
> enough pressure to over come the returning fuel?  Is the returning fuel
> under any pressure at all or just flowing back to the tank?  

    Let's look at this logically.  The only time you'll 
have fuel returning to the tank is when the engine is 
running (or a few seconds after shutdown).  The fuel pump 
is creating a negative pressure situation inside the tank 
by removing fuel.  The engine is burning some of the fuel 
being pumped out of the tank, so there will always be less 
fuel coming back than is being pumped out. Therefore, there 
should never be a head pressure against the return line - 
unless one positions the return outlet below the level of 
fuel.  Put the end of your return line near top center and 
you should never have a problem.

Regards,
Dale R.
COZY MkIV-R13B #1254