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  #1  
Old 04-15-2012, 09:51 AM
Jim Edwards Jim Edwards is offline
 
Join Date: May 2010
Location: Reno, NV
Posts: 4
Default Bending, flaring tight bends

I'm struggling with the flared tubing between the Andair fuel selector and the Andair fuel filter/boost pump. Here's the problem: My Parker Rolo Flare tool requires 3/4" of tubing to clamp the tube prior to making the flare and the AN819 sleeve adds another 1/2". Any tricks here to make the start of the bend closer to the flare? Thanks.
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  #2  
Old 04-15-2012, 10:20 AM
aerhed aerhed is offline
 
Join Date: Dec 2008
Location: Big Sandy, WY
Posts: 2,567
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Best you can do is flare first, then slide 819 to flare, then start bend behind the 819.
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  #3  
Old 04-15-2012, 10:23 AM
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Buggsy2 Buggsy2 is offline
 
Join Date: Jul 2008
Location: NorCal
Posts: 565
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What @aerhed said. Also, google for another flairing tool that doesn't require as much length as the standard Rolo Parker. I've heard they're out there.
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  #4  
Old 04-15-2012, 10:53 AM
131RB 131RB is offline
 
Join Date: May 2009
Location: Colorado
Posts: 302
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Vince Frazier has a nice tip for this on his website worth taking a look at. Check out vincesrocket.com and look under the engine section.
Ryan
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  #5  
Old 04-15-2012, 01:17 PM
Aaron C Aaron C is offline
 
Join Date: Jun 2007
Location: Rapid City, SD
Posts: 5
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After spending many, many, many hours on this problem, I finally ended up just moving the Andair pump forward an inch or two. Then there was enough room to have a longer tubing piece, which made it possible to make the bends properly. I ended up ordering a new center cabin cover, but that was minor compared to all the hours spent trying to make the tube bends work beforehand.
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  #6  
Old 04-15-2012, 02:23 PM
TS Flightlines TS Flightlines is offline
 
Join Date: Apr 2010
Location: Ridgeland, SC
Posts: 2,589
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Jim---
I modified my bender to move the nut and sleeve back--towards the bend arm. If I need to make a real tight bend, I bend the tube and install the nut after bending. I also made a mandrel to put inside the tube to support it against the bend brace on the bender. Works great.
Tom
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Joint Venture with Aircraft Specialty
Teflon Hose Assemblies for Experimentals
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RV7 Tail Kit Completed, Fuse started-Pay as I go Plan
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  #7  
Old 04-15-2012, 02:39 PM
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Buggsy2 Buggsy2 is offline
 
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@Tom: would you mind posting a pic of your modified bender?
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  #8  
Old 04-15-2012, 03:35 PM
Jim Edwards Jim Edwards is offline
 
Join Date: May 2010
Location: Reno, NV
Posts: 4
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Many thanks to those who have responded. I greatly appreciate the suggestions. Aaron, I may end up using your method. (We share a common bond with the many, many, many hours invested in what looks so simple on paper.) Tom, I can't visualize exactly how you modified your bender (I have a Harbor Freight cheapie as well as an Imperial 370 FH) but I, too, have thought about inserting a mandrel to give the bender "hook" something to hold on to. With the 3/8" tubing that I am using, the smooth shaft from a 19/64" drill bit seems the right size. I'd appreciate a photo, also, when you have the time. Thanks again.
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  #9  
Old 04-15-2012, 07:05 PM
TS Flightlines TS Flightlines is offline
 
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Location: Ridgeland, SC
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Hey Buggsy--Yep--I'll take a pic of it tomorrow and 'try' to post it. May need some help doing that. If not---I can email it to you.
Just so you'll know, Its a Imperial 470-FH. Nothing fancy, but I added a piece of angle to it so I can lock it in a vise. Much easier to use 2 hands and not fight it. I bend aluminum 5050-O and 304 stainless .035 wall with no issues.
(the stainless takes some muscle; thats the reason for the piece of angle and vise mounting).
Tom
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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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  #10  
Old 04-16-2012, 01:01 PM
TS Flightlines TS Flightlines is offline
 
Join Date: Apr 2010
Location: Ridgeland, SC
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i have pic ---just have to figure out how to upload them here!
Tom
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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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