From: "Steve Brooks" <steve@tsisp.com>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] Fwd: Fuel systems
Date: Thu, 16 Oct 2003 07:45:54 -0400
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In-Reply-To: <list-2638931@logan.com>
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Joe,
Some builders are using a 6 port fuel valve, but that's allot of fuel =
lines
running around that cockpit.  I wrestled with this issue for months, and
finally went with the transfer pump.  I plumbed both tanks to the fuel
selector per the plans, with the outlet of the fuel selector feeding the
engine.  I will normally always run on the left tank.  The fuel returns =
to
the left tank, and I have a facet pump to transfer from the right to the
left.  If that facet pumps ever fails, I can switch the fuel selector to =
the
right tank, and run from it.  Since the fuel still returns to the left, =
it
will also work as a transfer. =20

That's what I decided to do, and it has some redundancy.  I saw on the =
acre
group that some are using a 3 minute timer for the fuel transfer.  Push =
the
button, and the pump runs for 3 minutes, which they said was about 3
gallons.  I like this idea rather than just a switch, which could be =
left
on.  I was going to build some kind of an alarm for the switch, but the
timer sounds to me, like a better solution.

Steve Brooks
Cozy MKIV 13BT working on engine & finishing=20
South Carolina

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Joseph Berki
Sent: Thursday, October 16, 2003 7:22 AM
To: Rotary motors in aircraft


>
>Hi,
>         I know that this has been discussed before but I still have=20
>not  found a good solution. The Limo EZ (same as Long EZ) has two tanks =

>mid  wing design.  Original design requires fuel from both tanks to be=20
>fed to  a valve and then back to the engine.  Problem, fuel injection
requires
> special valve to return fuel to tank it was delivered from.   This =
means=20
> 3 more lines in addition to the 3 lines already in the cockpit.  I=20
>think  this is getting complicated.  I like the sump idea creating one=20
>tank but  the problem is return.  If you return it to the sump you heat =

>the fuel in  the sump up.  Is there any way to divide the fuel return=20
>so it can be  returned to both tanks?  If you tee the return lines does =

>the fuel divide  evenly?  I thought about another sump to return the=20
>fuel to and let it  drain into both tanks.  Make it higher than the=20
>delivery sump. I am  trying to avoid a transfer pump but it would need=20
>two lines instead of 3  and they could be placed outside the cockpit. =20
>What about using two pumps  that can be synchronized?  One could pump=20
>fuel from the right tank to the  fuel rail and the other could transfer =

>fuel from the left tank to the  right tank depending on the fuel flow=20
>being pumped from the right  tank?  Return fuel would go the the left=20
>tank making a continuous loop  allowing the fuel to cool? I keep=20
>thinking of my friends Bellanca with 5  fuel tanks a fuel management
nightmare.  Thanks for any help.
>
>Joe Berki
>Limo EZ


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