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  #1  
Old 02-11-2022, 11:59 AM
Burndout11 Burndout11 is offline
 
Join Date: Aug 2017
Location: Bakersfield, CA
Posts: 48
Default Fuel Line Flaring

When Iím flaring the ends of my fuel lines, Iím ending up with rough jagged edgesÖ. Like chatter marks. Is this something that can be lightly sanded smooth, or is it a prep/technique problem? Iím standing the ends square, deburring inside and out, and using some oil on my rolo-flair. Anything Iím missing?
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  #2  
Old 02-11-2022, 12:41 PM
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hamblin10 hamblin10 is offline
 
Join Date: Aug 2021
Location: Owasso, OK
Posts: 36
Default

Can you post a pic of your results? Thanks.
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RV-12iS in progress. N993EZ
Build 121398
Empennage kit ordered 9/30/21
Wing kit in work 07/11/22
Fuselage kit ordered 03/07/22
Finish kit ordered 03/18/2022
Owasso Oklahoma

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  #3  
Old 02-11-2022, 12:55 PM
Burndout11 Burndout11 is offline
 
Join Date: Aug 2017
Location: Bakersfield, CA
Posts: 48
Default

First attempt at attaching a photo. Letís see if it works.
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  #4  
Old 02-11-2022, 01:16 PM
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1001001 1001001 is offline
 
Join Date: Dec 2014
Location: Just Minutes from KBVI!
Posts: 1,392
Default

What kind of flaring tool are you using? The cheap ones I have used have left streaks like that. I upgraded to a Ridgid tool with an off-center forming cone that rolls along the flare rather than the fixed kind that smear the metal.

Edit: If you're using a rolo-flair, I think they're supposed to rotate and create a smooth surface. It looks like yours may be stuck and smearing the metal? There shouldn't be those circular grooves on the flare face.
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  #5  
Old 02-11-2022, 01:42 PM
JDeanda JDeanda is offline
 
Join Date: Apr 2013
Location: Ventura, CA
Posts: 320
Default Grease!

Looks like the male die is rough or worn. Maybe it could be smoothed up a bit? Also, a little grease might help.
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  #6  
Old 02-11-2022, 02:10 PM
abwaldal@gmail.com abwaldal@gmail.com is offline
 
Join Date: Jan 2017
Location: Battle Ground WA
Posts: 531
Default bad tool bad results

Wow I don't know who made the tool But it needs major repair or junking.
I've flared hundreds, maybe thousands of flares and with the cheapest tool I got better flares than that.
Me thinks you need another tool
Art
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  #7  
Old 02-11-2022, 02:15 PM
PilotjohnS PilotjohnS is offline
 
Join Date: Jan 2016
Location: Southwest
Posts: 2,328
Default should be

In my opinion, the flare part that rests on the AN fitting should be smooth and shinny. This shown is not acceptable and probably wont seal. The outer edge sometimes has a rough appearance like in the picture. sometimes I will sand down the outer edge to prevent the flare from cracking in severe environments. JMHO
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WARNING! Information presented in this post is my opinion. All users of info have sole responsibility for determining accuracy or suitability for their use.

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RV9A- Status:
98% done, 2% left to go
Structure done (less gear)
Electrical/Panel done
Firewall Forward 95% done
Fiberglass 90%
www.pilotjohnsrv9.blogspot.com
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  #8  
Old 02-11-2022, 02:16 PM
Burndout11 Burndout11 is offline
 
Join Date: Aug 2017
Location: Bakersfield, CA
Posts: 48
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Itís a brand new tool. I cleaned up the cone and it produced this flare.
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  #9  
Old 02-11-2022, 02:22 PM
PilotjohnS PilotjohnS is offline
 
Join Date: Jan 2016
Location: Southwest
Posts: 2,328
Default Junk

Quote:
Originally Posted by Burndout11 View Post
Itís a brand new tool. I cleaned up the cone and it produced this flare.
The tool is junk. Borrow someone else's and try again.Here is a picture from google. Also, your flare may have the wrong angle. Aircraft is 37 degrees, and automotive and AC are 45 degrees. they are not compatible.
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John S

WARNING! Information presented in this post is my opinion. All users of info have sole responsibility for determining accuracy or suitability for their use.

Dues paid 2022, worth every penny

RV9A- Status:
98% done, 2% left to go
Structure done (less gear)
Electrical/Panel done
Firewall Forward 95% done
Fiberglass 90%
www.pilotjohnsrv9.blogspot.com

Last edited by PilotjohnS : 02-11-2022 at 02:29 PM.
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  #10  
Old 02-11-2022, 04:10 PM
Burndout11 Burndout11 is offline
 
Join Date: Aug 2017
Location: Bakersfield, CA
Posts: 48
Default

Here is the result when I donít use the back and forth method, and just turn it all the way once, then back outÖ. Much less scoring
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