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From: "Joe Ewen" <jewen@comporium.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-1714215@logan.com>
Subject: Re: [FlyRotary] fuel pumps
Date: Mon, 25 Dec 2006 15:27:50 -0500
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Lou,

In my opinion both pumps should be turned  on for takeoff and landing.  A 
pump failure occurring in these phases is not a good time to diagnose a loss 
of power.  If the pumps and pressure regulator are properly sized, there 
should be no change in pressure.  The pressure regulator relieves fuel back 
to the tank to maintain the correct pressure.  What will increase is fuel 
flow in the return line back to the tank.  IMO the pumps should be in 
parallel.  In my installation, I also have a filter on each pump rather than 
1 common filter.  These comments are intended for a EFI system, not for a 
carbureted system.

Joe


----- Original Message ----- 
From: "lou rubin" <grdflyguy@yahoo.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Monday, December 25, 2006 2:05 PM
Subject: [FlyRotary] fuel pumps


> Is it common procedure to use both fuel pumps on for
> take off & landing? Its great redundency, however, Im
> concerned there may be to much  fuel pressure.
>
> Lou
>
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