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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. 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 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 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 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 3 more lines in addition to the 3 lines already in the cockpit. I think this is getting complicated. I like the sump idea creating one 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 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 fuel to and let it drain into both tanks. Make it higher than the delivery sump. I am trying to avoid a transfer pump but it would need two lines instead of 3 and they could be placed outside the cockpit. What about using two pumps that can be synchronized? One could pump 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 being pumped from the right tank? Return fuel would go the the left tank making a continuous loop allowing the fuel to cool? I keep thinking of my friends Bellanca with 5 fuel tanks a fuel management
nightmare. Thanks for any help.
Joe Berki
Limo EZ
Homepage: http://www.flyrotary.com/
Archive: http://lancaironline.net/lists/flyrotary/List.html
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