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02-17-2020, 03:28 AM
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Join Date: Nov 2005
Location: Asheville, NC
Posts: 2,692
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Quote:
Originally Posted by Saville
According to Section 5, Vans suggests 3003 Soft Aluminum tubing for fuel lines.
I take it that it's 3/8" OD and part number AT0-035X3/8? (the only difference in the 4 options being the length). Wall thickness .035 if I'm reading this correctly.
I was told by one A&P that he uses 5052.
Any opinions on 3003 vs 5052?
Thanks
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5052 is much stiffer than 3003. I used 5052 in some places. It has been long enough ago that I don't remember if I used it everywhere or not. 5052 bends are by tool only. 3003 can be done by hand in some cases. I prefered my flair results on 5052 over 3003.
__________________
Bill Pendergrass
ME/AE '82
RV-7A: Flying since April 15, 2012. 850 hrs
YIO-360-M1B, mags, CS, GRT EX and WS H1s & A/P, Navworx
Unpainted, polished....kinda'... Eyeballin' vinyl really hard.
Yeah. The boss got a Silhouette Cameo 4 Xmas 2019.
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02-17-2020, 05:34 AM
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Join Date: Dec 2016
Location: Greenville, SC
Posts: 474
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You will quickly learn to appreciate Tom and his beautiful products when you retrofit an AFP boost pump and filter into a flying RV-8. I just don't think I could have done the tube bending and fitting required while wedged into the area of the left rudder pedal. With Tom's products, I was able to do it sitting in the seat (filter) or through the front baggage compartment with the floor removed (boost pump).It wasn't simple but it wasn't terrible either. First flight yesterday after install and ground checks and all is perfect. BTW, replaced all FWF hoses at the same time with Tom's integral firesleeve, lifetime teflon molded hoses. Beautiful stuff!
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02-17-2020, 01:38 PM
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Join Date: Apr 2006
Location: Ottawa , Canada
Posts: 224
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Some more info that I found useful
Hi,
I had some issues figuring out what was 'just right' for the flare itself.... I asked on this forum and got some great advice...
Here's the link
http://www.vansairforce.com/communit...ad.php?t=47167
Good luck,
__________________
Chris Hepburn
Ottawa, ON
RV-8 C-GOGO FLYING
Renew 12/20
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02-17-2020, 01:49 PM
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Join Date: Sep 2007
Location: Central IL
Posts: 5,516
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Quote:
Originally Posted by David Paule
You can always cut a 2" length of line, perhaps, put a flare on it and see what its finished length is. Then you'll know.
Dave
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+1 this is exactly what I did to learn with my tools. Short length of tube, and flare union . . . . measured both before flaring and after it was assembled using a dial caliper. To make prototype pieces, I used a length of coat hanger and bent to the start and end point. Then used for a gage against the tube being bent.
__________________
Bill
RV-7
Lord Kelvin:
“I often say that when you can measure what you are speaking about,
and express it in numbers, you know something about it; but when you
cannot measure it, when you cannot express it in numbers, your knowledge
is of a meager and unsatisfactory kind.”
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02-17-2020, 06:44 PM
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Join Date: Apr 2010
Location: Ridgeland, SC
Posts: 2,589
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Well, in the production shop we use a CMM scanner to give the profile of an existing tube, OR a drawing that we can make a prototype of. (RV12, RV14 for examples). WE make one, and compare it to one that fits the application. IF it doesnt fit, thene we adjust it so it does, and re-scan it to do a comparison. ONe we have one that is correct, we have the computer software tell us the tube cut lenghts, and where to start bends and what degree and axis to make those bends.
Yes this is mostly for doing production tubes, like the 12 IS and 14 fuel systems, among others. Somewhat way overkill for 1 tube. But knowing some dimensions, we can do the same thing on single piece tubes. But like I said, different bender with different bend radius heads or dies, will give you different length dimensions.
Just practice on some scrap until you find what your bender will give you.
Tom
__________________
Tom Swearengen, TS Flightlines LLC, AS Flightlines
Joint Venture with Aircraft Specialty
Teflon Hose Assemblies for Experimentals
Proud Vendor for RV1, Donator to VAF
RV7 Tail Kit Completed, Fuse started-Pay as I go Plan
Ridgeland, SC
www.tsflightlines.com, www.asflightlines.com
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