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  #11  
Old 01-17-2012, 11:19 AM
Greg Arehart's Avatar
Greg Arehart Greg Arehart is offline
 
Join Date: Jul 2007
Location: Delta, CO/Atlin, BC
Posts: 2,391
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Well worth the $ (for me, anyway) to buy nice flexible braided steel, teflon-lined, tygon-coated lines. Being flexible and stainless, there is less chance that they will wear through and cause a leak.

Greg
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RV-9B (Big tires) Tipup @AJZ or CYSQ
N 7965A
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  #12  
Old 01-17-2012, 11:54 AM
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Toobuilder Toobuilder is offline
 
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Location: Mojave
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Default Keep it on point...

Properly installed aluminum hardlines will last as long as the airframe (the same can't be said for flex), so the only practical advantage of flex is "easier". For some, that may be worth the considerable price and weight increase.
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WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.

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  #13  
Old 01-17-2012, 12:55 PM
Wayne Gillispie Wayne Gillispie is offline
 
Join Date: Apr 2009
Location: USA
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Agree with Michael. Use 3003 or hdwr tubing for practice, then order twice what you need in 5052. Also ensure bender is very smooth and lightly lubricate any parts of bender that make contact with aluminum tubing.

Recycle that scrap. Miller needs it.
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  #14  
Old 01-17-2012, 02:46 PM
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Buggsy2 Buggsy2 is offline
 
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Location: NorCal
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Quote:
Originally Posted by Wayne Gillispie View Post
Use 3003 or hdwr tubing for practice, then order twice what you need in 5052.
I agree, but the lines from the fuel selector to the wings on the A models are a complete !@&#^%. Perhaps a pro could get them done with 5052, but for us amateurs it's either 3003 or flexible.
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RV-9A QB-SA
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  #15  
Old 01-17-2012, 10:02 PM
rkochcyxh rkochcyxh is offline
 
Join Date: Oct 2005
Posts: 75
Default Flex fuel lines

i have to do my fuel lines shorty. where are you getting the flex fuel lines from.
thanks
russel koch
RV9A Working on wiring and conopy.
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  #16  
Old 01-17-2012, 10:10 PM
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LettersFromFlyoverCountry LettersFromFlyoverCountry is offline
 
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Location: St. Paul, MN.
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Quote:
Originally Posted by gbrasch View Post
I have a pile of shame too.
Pile of Shame. That's awesome! One of these days, maybe there should be a "Show Us Your Pile of Shame" thread.
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  #17  
Old 01-17-2012, 10:30 PM
jpharrell jpharrell is offline
 
Join Date: Jan 2010
Location: Mission Viejo, CA
Posts: 130
Default Here's a Tip

Bruce Swayze did a great job of documenting a relatively easy way to do this on his site here: http://www.europa.com/~swayze/RV-7A/.../20100528.html for his 7A. I imagine this would also work as well for a 9A. I just completed the lines for my 7A last weekend using the same process and it worked great. One key is to put each tube through the middle hole in the weldment, not the bottom hole as I first assumed. My tanks have flop tubes which make the job even tougher. You can see photos of my installation here.

John Harrell
RV-7A Tip-up
Empennage done, wings done, fuselage 90% done
Finishing kit scheduled to ship Feb 6
http://www.johnsrv7a.wordpress.com

Last edited by jpharrell : 01-17-2012 at 10:33 PM.
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  #18  
Old 01-18-2012, 12:30 AM
ao.frog ao.frog is offline
 
Join Date: Sep 2006
Location: Manstad, Norway
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Have you researched Bonaco fuel lines? And they make brake-lines too!

GREAT customer care and great product! Saves you ALOT of trouble...
Talk to Brett.

You'll find their add on the front page on this forum.
Here's a link: http://www.bonacoinc.com/
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First RV-7 completed, (bought partly finished from a US-builder) 305 hrs per July 2014, SOLD
Second -7 had first flight Feb 25th 2014. 220 hrs pr July 2019. Life is good!
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  #19  
Old 01-18-2012, 07:30 AM
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airguy airguy is offline
 
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Location: Garden City, Tx
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I attempted 3 times to make that line on my 9A, each resulting in an addition to my pile of shame, before calling Brett at Bonaco. Now life is good...
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Greg Niehues - SEL, IFR, Repairman Cert.
Garden City, TX VAF 2020 dues paid
N16GN flying 700 hrs and counting; IO360, SDS, WWRV200, Dynon HDX, 430W
Built an off-plan RV9A with too much fuel and too much HP. Should drop dead any minute now.
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  #20  
Old 01-18-2012, 08:01 AM
RV7ator RV7ator is offline
 
Join Date: Jan 2005
Location: Boise, ID
Posts: 1,007
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Consider using additional fittings to break the line into shorter segments with fewer bends. That's what I do on tailwheelers, should help on a nosedragger.
The fitting for left and one for right is -6 universal bulkhead, straight or 45 as suitable, though the side of the fuel valve pedestal receiving the short kinky lines from valve to fitting, then the long straight section with merely a S-turn from fitting out the fuse.

John Siebold
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