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WurlyBird
Joined: 16 May 2008
Posts: 207
Location: North Pole, Alaska
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 Posted: Fri Dec 10, 2010 2:39 am Post subject: Setting up the Fuel lines |
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So when I get home I replacing my fuel tanks and re-running all the fuel lines since I don't like the way the builder did it. The fuel lines come out of the tanks on the bottom of the rear inboard portion of the tank, I believe this is where the drain or strainer is supposed to go. the port on the inboard side had a line with a valve on it that could be used, very infrequently, for draining fuel. Once inside the lines run behind the seat and under the door up to the header tank behind the panel. I don't like that the lowest point of the system is in aluminum tubing under the door. there is also no vent for the header as it is plugged off instead of going back to one of the tanks. this should go to the TOP of one tank, correct?
So how do you have your lines running? How does the manual recommend running the lines? Is there any benefit to going to the nylon header that goes behind the seat? Any other thoughts? Thanks.
James
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James
Kitfox 3 / 582 / 70" IVO 2 blade GA
50 hrs on the 582 swapping for HKS 700E and Avid Cowl. |
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lcfitt(at)sbcglobal.net
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| Posted: Fri Dec 10, 2010 7:45 am Post subject: Setting up the Fuel lines |
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James,
I think this will be pretty much the consensus over the years. The later
Kitfoxes use a header tank that is placed near the bottom behind the
passenger seat. Because this becomes the low point in the system many have
done away with the gascollator. The fuel lines are run from the main tanks
to the header tank, then at the side of the seat to the shut off valve.
Some, myself included have added a switchable 4.5 psi max Facet fuel pump in
the aluminum line just out of the header tank.
Lowell
--------------------------------------------------
From: "WurlyBird" <james.t.trizzino(at)us.army.mil>
Sent: Friday, December 10, 2010 2:40 AM
To: <kitfox-list(at)matronics.com>
Subject: Setting up the Fuel lines
| Quote: |
<james.t.trizzino(at)us.army.mil>
So when I get home I replacing my fuel tanks and re-running all the fuel
lines since I don't like the way the builder did it. The fuel lines come
out of the tanks on the bottom of the rear inboard portion of the tank, I
believe this is where the drain or strainer is supposed to go. the port
on the inboard side had a line with a valve on it that could be used, very
infrequently, for draining fuel. Once inside the lines run behind the
seat and under the door up to the header tank behind the panel. I don't
like that the lowest point of the system is in aluminum tubing under the
door. there is also no vent for the header as it is plugged off instead
of going back to one of the tanks. this should go to the TOP of one tank,
correct?
So how do you have your lines running? How does the manual recommend
running the lines? Is there any benefit to going to the nylon header
that goes behind the seat? Any other thoughts? Thanks.
James
--------
James
Kitfox 3 / 582 / 70" IVO 2 blade GA
50 hrs on the Fox in between deployments,
now she lies in wait
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=322817#322817
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Pat Reilly
Joined: 06 Aug 2009
Posts: 345
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| Posted: Fri Dec 10, 2010 9:44 am Post subject: Setting up the Fuel lines |
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James, My fuel routing sounds similar to yours. But, I do have a vent line from the nylon header back to the wing tank. The header tank is to be mounted low behind the seat to give a reserve when steep desent unports a wing tank. I had an aluminum header tank mounted much higher and John McBean suggested the lower mounted nylon tank. I do have shut off valves on each wing tank supply line and the vent line also.
Pat Reilly
Mod 3 582 Rebuilt
Rockford, IL
On Fri, Dec 10, 2010 at 4:40 AM, WurlyBird <james.t.trizzino(at)us.army.mil (james.t.trizzino(at)us.army.mil)> wrote:
| Quote: | --> Kitfox-List message posted by: "WurlyBird" <james.t.trizzino(at)us.army.mil (james.t.trizzino(at)us.army.mil)>
So when I get home I replacing my fuel tanks and re-running all the fuel lines since I don't like the way the builder did it. The fuel lines come out of the tanks on the bottom of the rear inboard portion of the tank, I believe this is where the drain or strainer is supposed to go. the port on the inboard side had a line with a valve on it that could be used, very infrequently, for draining fuel. Once inside the lines run behind the seat and under the door up to the header tank behind the panel. I don't like that the lowest point of the system is in aluminum tubing under the door. there is also no vent for the header as it is plugged off instead of going back to one of the tanks. this should go to the TOP of one tank, correct?
So how do you have your lines running? How does the manual recommend running the lines? Is there any benefit to going to the nylon header that goes behind the seat? Any other thoughts? Thanks.
James
--------
James
Kitfox 3 / 582 / 70" IVO 2 blade GA
50 hrs on the Fox in between deployments,
now she lies in wait
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=322817#322817
ber is the Annual List Fund Raiser. Click on
/" target="_blank">www.aeroelectric.com
omebuiltHELP www.homebuilthelp.com
http:/r generous support!
ronics List Features Navigator to browse
s.com/Navigator?Kitfox-List" target="_blank">http://www.matronics.com/Navigator?Kitfox-List
ronics.com/" target="_blank">http://forums.matronics.com
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Pat Reilly
Mod 3 582 Rebuild
Rockford,IL
[quote][b]
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Guy Buchanan
Joined: 16 Jul 2006
Posts: 1204
Location: Ramona, CA
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| Posted: Fri Dec 10, 2010 2:04 pm Post subject: Setting up the Fuel lines |
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On 12/10/2010 2:40 AM, WurlyBird wrote:
| Quote: | So how do you have your lines running? How does the manual recommend running the lines? Is there any benefit to going to the nylon header that goes behind the seat? Any other thoughts? Thanks.
James,
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Let's see: wing tanks, strainer, 1' of 1/2" flex tube turning aft
along upper fuselage member above triangular window, converting to 3/8"
aluminum tube, around the seatbelt mount and back forward to the top of
the poly header tank low behind the bulkhead behind the right seat. 1/4"
Aluminum tube vent from the top of the header tank to the top of the
right wing tank. (Blue 1/4" fuel line from just over the rear corner of
the triangle window to the tank.) Fuel drain out the bottom of the
header tank. (My gascolator.) 3/8" fuel pickup centered two inches above
the bottom of the header tank to a fuel filter just forward of the
header tank, around the right seat below the door sill, back to
centerline to a fuel valve in my "center console", then forward through
the firewall just above the lower motor mount bolt.
The only benefit to the low aft header tank is that it acts as a
gascolator and that it vents uphill all the way to the wing tank. (You
have trouble pushing bubbles down hill.)
Guy Buchanan
Kitfox IV-1200 / 592 C / Warp 3cs
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Guy Buchanan
Deceased K-IV 1200
A glider pilot too. |
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Tom Jones
Joined: 12 Mar 2006
Posts: 752
Location: Ellensburg, WA
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| Posted: Sat Dec 11, 2010 8:35 am Post subject: Re: Setting up the Fuel lines |
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James, I had mine plumbed like yours are but also did not like the low spot in the line under the door. I changed it to how the service Bulletin recommends with the panel tank. In the last picture the line under the windshield screw on the left is the main line from the wing tank. The other line is the vent. The vent line is connected to each side of the two high spots of the panel tank and a T in this line runs to the top of the wing tank. You can see the vent line and fitting in the top of the wing tank in the site gauge picture.
One advantage of a rear header tank is it makes for a good down hill slope all the way from the wing tank. In the pictures you can see the slope in the lines above the door is just about level with the panel tank routing. To get all the fuel in the wing tank to drain I must fly with that wing high for a little while.
Service Bulletin #29 http://www.kitfoxaircraft.com/support/service_bulletins/sb29.htm
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Tom Jones
Classic IV
503 Rotax, 72 inch Two blade Warp
Ellensburg, WA |
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