The Murphy Builders Site

Wayne, you got me worried about unporting now. As you probably recall, I
have 4 bays per wing which has been useful, but obviously that makes the
problem worse by spreading out the fuel in the tank, and if It's already
low it will be more likely to unport in a decent.
Should I be considering adding headers behind the door posts? I haven't
played around with finding the minimum fuel level for extended decents
yet, and I imagine it would be difficult to nail it down. How long does a
lyc run at idle on the fuel in the lines?

Sent from my Verizon Wireless 4GLTE smartphone

----- Reply message -----
From: "Wayne G. O'Shea" <oifa@irishfield.on.ca>
To: <rebel-builders@dcsol.com>
Subject: [rebel-builders] Re: [rebel-builders] clear fuel line
Date: Fri, Dec 2, 2011 4:51 pm


The sight gauge as per the latest manual.. vertical at the front of the
tank... won't show you the last ELEVEN gallons US when sitting static on
wheels or the last SEVEN gallons when sitting on floats (or in flight)
with
a standard 22 gallon x 3 bay fuel tank. 3 bays is standard, 2 bays is for
Rotax fellas and 4 bays is optional on the Elite.

The small header would definitely be a bonus in a long decent. I always
figured I was a tad tail low coming in to land and it didn't matter, until
Leah got a shot of me coming in over the trees on Temagami landing across
the channel, read SHORT, and I'm probably nose down 10 degrees = uncorked
fuel outlet!

Wayne

----- Original Message -----
From: "Bob Palmer" <rtpalmer@shaw.ca>
To: <rebel-builders@dcsol.com>
Sent: Friday, December 02, 2011 7:34 PM
Subject: Re: [rebel-builders] Re: [rebel-builders] clear fuel line

Eduardo,

That is a good point re: header tank. I have considered that idea on a
smaller scale, as we have a piston engine. I have thought of putting in
a small 1 liter tank just downstream of the tank outlet right behind the
door frame.
Personally, I don't have a problem with the position of the sight gauge
as per the manual even though it won't show you the last little bit. If
you are reading it in flight then when you cannot see fuel you are
already in a low fuel situation . Even with the standard two bay tanks
(Elite) there seems to me a potential for fuel to slop around and induce
air into the outlet at anything less than what can be read with the
standard setup. Even more so with the long range tanks (3 bays).
With a small sump or header tank on each side you would be safer in the
descent in a 'low fuel in turbulence' situation. Haven't done it yet
though. For the moment I just carry more fuel.

Bob.

On 12/2/2011 12:01 PM, Eduardo Gutierrez Sosa wrote:

Hi Wayne: That's another good point that the lower sight gauge fitting
be
placed sepparately to the fuel feed line, so no air flows in. I will
install
a header tank with air relief line to the top of the wing's tank
(exactly
don't know how just yet). This header tank will hold approximately 5
gallons
of fuel and will be installed under the pilot's seat, below the
floorboard.
This installation is mandatory for the turbo prop engine.
I appreciate the photo you sent, it's how I will make mine too, and yes,
the
wing is upside down.
Regards, Eduardo

El 02/12/11 13:00, "Wayne G. O'Shea"<oifa@irishfield.on.ca> escribi�:


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