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From: Dale Rogers <dale.r@cox.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: [FlyRotary] Return flow (was: Ah Ha! Pressure Regulator Problem?)
Date: Mon, 24 Jan 2005 11:00:10 -0500
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Bill,

   You've touched upon a consideration that I'd run into 
in designing my fuel system.  I'm using an adaptation of 
Marc and Nadine Parmelee's COZY:

http://www.marcnadine.com/fuelvalve.html

   They weren't running EFI, however and didn't have to 
plumb for a return line.  Since my take-off procedure 
will be to run both tanks simultaneously, I needed 
a regulator capable of handling the total flow (minus 
consumption at idle) of both pumps.  Assuming a 1/4" feed, 
my return lines needed to be 3/8".

Dale R.
COZY MkIV #1254


> From: WRJJRS@aol.com
> Date: 2005/01/23 Sun PM 08:53:19 EST
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Subject: [FlyRotary] Re: Ah Ha! Pressure Regulator Problem?
> 
> Ed, There are two parts to this equation. First: Does the regulator flow 
> enough by itself. Second: and almost as important is the plumbing itself. Some 
> people will use very small return plumbing. That plumbing can restrict flow, 
> keeping the fuel presure high. Another thing for the new people to remember, be 
> sure your return switches with your tank valve. There have been accidents where 
> the return flow wasn't switched and the tank ran dry. (Always on final of 
> course)
> Bill Jepson