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  #1  
Old 01-27-2022, 12:42 PM
vinzer vinzer is offline
 
Join Date: Aug 2017
Location: BC, Canada
Posts: 151
Default Fuel line from fuse to tank question

I would like to ask how you guys routed your fuel line from fuse to wing tank.
While browsing other builders logs I saw two common solutions:

1. Aluminum fuel line goes from fuse through the rubber bushing, bends 90 and 90 outside and basically connects to fuel tank. This is how plans call it.

2. Another way is to install 90 degrees AN fitting in the fuselage hole and then use similar 90 deg bend line outside to connect to tank.
See my picture.


Question: will (2) be safe method in terms of all vibrations etc ? I understand that wing will vibrate and rubber bushing technically compensate all that while 90 deg AN fitting allows no flex thus may cause micro cracks ?

What do you think ?
Thank you!
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RV10 (#42078)(C-FFVX) - Started my build on Oct 31, 2019
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  #2  
Old 01-27-2022, 12:48 PM
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Carl Froehlich Carl Froehlich is offline
 
Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
Posts: 3,585
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I suggest, as with all fuel line runs, you limit the number of 90 degree fittings as close to zero as possible.

What I did:
- I installed a 45 degree fitting on each side of the tunnel, the angle part on the inside pointed in a way that made bending the fuel lines to the Andair fuel valve as easy as possible. Trying to make the fuel line from the tank all one run is just too hard.
- The line from this fitting to the tank is one run, through the fuselage grommet.

You might end up with a few feet of 3/8" tubing in the scrap pile, but once done it is good to go.

Carl
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  #3  
Old 01-27-2022, 02:15 PM
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mike newall mike newall is offline
 
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Location: Yorkshire, England
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You need to call Tom at TS Flightlines...... All issues solved
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  #4  
Old 01-27-2022, 07:11 PM
Weefle Weefle is offline
 
Join Date: Sep 2020
Location: Vernon BC
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Quote:
Originally Posted by mike newall View Post
You need to call Tom at TS Flightlines...... All issues solved
I second that. TS makes it way too easy!

Keith
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  #5  
Old 01-27-2022, 07:45 PM
vinzer vinzer is offline
 
Join Date: Aug 2017
Location: BC, Canada
Posts: 151
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Thank you for your recommendations.
I will review TS Flightlines website to see what I may use in my setup
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RV10 (#42078)(C-FFVX) - Started my build on Oct 31, 2019
Working on SB fuselage (March 04, 2021)
RV10 (#42756) - Empennage kit on order (Feb, 2022)
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  #6  
Old 01-28-2022, 01:49 AM
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mike newall mike newall is offline
 
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Location: Yorkshire, England
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Their websites have had wobbles recently, but as they are working together, this one works with contact details

http://www.aircraftspecialty.com/
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  #7  
Old 01-28-2022, 04:35 AM
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Auburntsts Auburntsts is offline
 
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Location: Tampa, FL
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I did it per the plans. No issues whatsoever.
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  #8  
Old 01-28-2022, 04:54 AM
Kyle Boatright Kyle Boatright is online now
 
Join Date: Aug 2005
Location: Atlanta, GA
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Quote:
Originally Posted by Auburntsts View Post
I did it per the plans. No issues whatsoever.
This. Ain't hard. Even if you mess it up, aluminum tubing is very inexpensive.
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  #9  
Old 01-28-2022, 06:34 AM
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Bill.Peyton Bill.Peyton is offline
 
Join Date: Sep 2009
Location: St. Louis, MO
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Do not insert any more 90-degree fittings than necessary. I have 0 (no) 90 degree fittings between my tank and fuel selector valve. I have one straight coupling under the seat pan. It's easy to fabricate the aluminum tubing and it's cheap to try numerous times. I had fuel fluctuation issues during climb when I had two 90 deg. fittings installed. They went away when the fitting were removed.
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  #10  
Old 01-28-2022, 09:40 AM
danny danny is offline
 
Join Date: Jul 2005
Location: puyallup, wa
Posts: 169
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I "thirds" recommend T S Flightlines. I have a nice flexible that makes the transition from the valve to wing root.
danny
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