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02-10-2008, 01:55 PM
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Join Date: Aug 2006
Posts: 247
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Bending Fuel tank attach bracket
Hey all-
Got the wing mounted on right side and trying to fit the fuel tank attach bracket. I understand the need to bend the flange of the bracket a little but I have tried EVERYTHING and cannot get the thick aluminum angle metal to bend even a little! Would appreciate any thoughts. How did you all bend that thick aluminum angle? I have tried in a vice and wacking it in many different ways without any success.
As always, thanks for your help!
Peter K
9A QB
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02-10-2008, 02:03 PM
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Join Date: Mar 2005
Location: Dallas area
Posts: 10,762
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Bend before cutting!
The trick is to bend it before you cut it. The full size angle is much easier bent.
__________________
Mel Asberry, DAR since the last century.
EAA Flight Advisor/Tech Counselor, Friend of the RV-1
Recipient of Tony Bingelis Award and Wright Brothers Master Pilot Award
USAF Vet, High School E-LSA Project Mentor.
RV-6 Flying since 1993 (sold)
<rvmel(at)icloud.com>
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02-10-2008, 11:17 PM
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Join Date: Feb 2005
Location: Minneapolis
Posts: 2,471
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Get a bigger hammer or a bigger vice, or both! 
I've whacked (I mean gently bent) a number of them.....
Cheers,
Stein |
02-11-2008, 05:35 AM
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Join Date: Jan 2005
Location: Ruston, Louisiana
Posts: 878
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Thick Aluminum?
Quote:
Originally Posted by avi8tor50
Hey all-
Got the wing mounted on right side and trying to fit the fuel tank attach bracket. I understand the need to bend the flange of the bracket a little but I have tried EVERYTHING and cannot get the thick aluminum angle metal to bend even a little! Would appreciate any thoughts. How did you all bend that thick aluminum angle? I have tried in a vice and wacking it in many different ways without any success.
As always, thanks for your help!
Peter K
9A QB
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Peter,
The thick aluminum angle is attached to the tank.
I don't think you'll bend it without deforming the tank.
The fuselage has a bracket made of steel, which is thinnner but strong too.
I'm not to that point yet, but I intend to bend the steel bracket to mate up with the thick aluminum bracket on the tank.
This may involve removing the steel bracket from the fuselage and using a vise and big hammer.
Mark
__________________
Mark Burns
Ruston, Louisiana
RV-7A N781CM 1,650+ hrs
FFI FL-24
A&P
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02-11-2008, 06:47 AM
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Join Date: Mar 2006
Location: Ottawa, ON
Posts: 650
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Quote:
Originally Posted by Mark Burns
Peter,
The thick aluminum angle is attached to the tank.
I don't think you'll bend it without deforming the tank.
....Mark
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Mark, the RV-7 has steel tank brackets on the fuse. For the RV-9, you need to make your own out of thick aluminum angle, and give it a few degrees bend. Don't know why the steel bracked was not chosen for the RV-9 as well.
Peter, I precut my angle, and bent it on a vise, holding the shorter end in the vise. Then whacked it with a rubber mallet, and measured the angle after a couple of whacks. Like someone said earlier, you may need a bigger hammer or bigger vise.
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Alfio
RV-9A Ottawa, Canada
First flight Dec. 18, 2008
> 1,000 hrs tach.
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02-11-2008, 08:18 AM
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Join Date: Jan 2005
Location: Ruston, Louisiana
Posts: 878
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Quote:
Originally Posted by Lycosaurus
Mark, the RV-7 has steel tank brackets on the fuse. For the RV-9, you need to make your own out of thick aluminum angle, and give it a few degrees bend. Don't know why the steel bracked was not chosen for the RV-9 as well.
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Oh, I assumed they were the same.
Thanks,
Mark
__________________
Mark Burns
Ruston, Louisiana
RV-7A N781CM 1,650+ hrs
FFI FL-24
A&P
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02-11-2008, 02:32 PM
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Join Date: Aug 2006
Posts: 247
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I have tried all that and have gotten no results. I believe I will find someone who has a bending brake and see if that will work. Thanks for your responses.
Peter K
9A QB
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02-11-2008, 02:44 PM
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Join Date: Jan 2005
Posts: 3,642
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Put both edges of the angle in the vise with the vertex pointed up. Tighten down on the the vise to pull the edges closer to each other. Every few turns pull the angle out to measure it against the fuse and tank bracket. Worked for me.
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Steve M.
Ellensburg WA
RV-9 Flying, 0-320, Catto
Donation reminder: Jan. 2021
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02-11-2008, 09:29 PM
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Join Date: Feb 2005
Location: Minneapolis
Posts: 2,471
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Quote:
Originally Posted by avi8tor50
I have tried all that and have gotten no results. I believe I will find someone who has a bending brake and see if that will work. Thanks for your responses.
Peter K
9A QB
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No-No don't do that!!! We have a pretty good sized finger brake, but putting that short of a piece of that thich aluminum in the brake will likely "break" the brake (or deform it). I'd kill someone if they tried to do that on my brake, and it's rated for .100!
One might not notice it, but putting small pieces of material rated for much thicker than the brake can bend/twist/warp parts of the brake and should be avoided entirely.
The vice/hammer method has worked for decades on these things...just get good and mad at the darned thign - don't be gentle! Not often you really get to hit something hard on these kits!
Cheers,
Stein |
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