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Over-fluting

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PFolbrecht(at)starkinvest
Guest

Posted: Wed Mar 15, 2006 8:51 am Post subject: Over-fluting

Is there really any way to undo over-fluting of a rib?



My fluting was going well until I got to R-903 - long, skinny rudder

rib.  I over-did it and it's now bowed the other way.  Drat.  I figure

anything that could be done now would probably result in fatigued metal

anyway.



Paul



9A QB 1176

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rv7(at)b4.ca
Guest

Posted: Wed Mar 15, 2006 9:14 am Post subject: Over-fluting

On 8:45:53 2006-03-15 "Folbrecht, Paul" <PFolbrecht(at)starkinvestments.com>

wrote:

 	  Quote: 	
		   Is there really any way to undo over-fluting of a rib?



 My fluting was going well until I got to R-903 - long, skinny rudder

 rib.  I over-did it and it's now bowed the other way.  Drat.  I figure

 anything that could be done now would probably result in fatigued

 metal anyway.


	


Fear not!  You can gently squeeze some of the flutes with a pair of seaming

pliers (two flat plates welded to a pair of vise-grip jaws) or something

similar.  Heck, even putting the rib on edge on your wooden shop table, and

hitting the flute gently with your dead-blow hammer would probably flatten

them out adequately.



The fluting process doesn't stress the material so much that a little

"unbending" will hurt it.  Be gentle, and spread the unbending out over the

entire rib, and the part will be just fine.



-Rob

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dan(at)rvproject.com
Guest

Posted: Wed Mar 15, 2006 9:27 am Post subject: Over-fluting

Hand seamer, squeeze the flutes out a bit.  It happens.



)_( Dan

RV-7 N714D

http://www.rvproject.com



---

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dan.beadle(at)inclinesoft
Guest

Posted: Wed Mar 15, 2006 9:27 am Post subject: Over-fluting

I use a hand seamer - pliers with a 3" wide jaw - to take out some of the

over fluting.  Seems to work fine.



--

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dennis.glaeser(at)eds.com
Guest

Posted: Wed Mar 15, 2006 9:54 am Post subject: Over-fluting

I've done that, and to un-do it I just turned my fluting pliers at as

close to 90 degrees as I could get and squeezed a bit to flatten the

flute a bit.  Or sandwich the flute between a couple of scraps of metal

and squeeze it with pliers (or whatever).  It doesn't take much.  You'd

have to flute and (totally) flatten the same spot more than a couple of

times before you have to worry about fatiguing the metal.



Dennis Glaeser

7A Fuselage



-------------------------------------

Is there really any way to undo over-fluting of a rib? My fluting was

going well until I got to R-903 - long, skinny rudder rib. I over-did it

and it's now bowed the other way. Drat. I figure anything that could be

done now would probably result in fatigued metal anyway. 

Paul 9A QB 1176

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truflite(at)yahoo.com
Guest

Posted: Wed Mar 15, 2006 4:57 pm Post subject: Over-fluting

Turn the fluting pliers over putting the center node

exactly on the center of the flute it created.  Gently

squeeze till the reverse bend is gone.



Dave

--- "Folbrecht, Paul"

<PFolbrecht(at)starkinvestments.com> wrote:



 	  Quote: 	
		   

 <PFolbrecht(at)starkinvestments.com>

 

 Is there really any way to undo over-fluting of a

 rib?

 

 

 

 My fluting was going well until I got to R-903 -

 long, skinny rudder

 rib.  I over-did it and it's now bowed the other

 way.  Drat.  I figure

 anything that could be done now would probably

 result in fatigued metal

 anyway.

 

 

 

 Paul

 

 9A QB 1176

 

 

 

 

 

 

 



 browse

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PFolbrecht(at)starkinvest
Guest

Posted: Thu Mar 16, 2006 7:14 am Post subject: Over-fluting

Thanks for all the responses on the fluting issue!  Mainly I was

concerned about fatiguing the metal.  It was indeed easy to un-flute

using the seamer.



Paul

9A QB #1176

HS & VS done, working on rudder

--

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pcowper(at)webtv.net (Pet
Guest

Posted: Thu Mar 16, 2006 11:26 pm Post subject: Over-fluting

A tip to avoid over fluting is to lay the rib flat on the worktable

after marking each fluting location and kneel down so your eyes are at

table level looking under the rib toward the light from the open door.

As you squeeze the fluting pliers you will see the rib sink down to the

flat tabletop and the light coming under the bowed rib will disappear as

it flattens out.  Just gently move around the rib deepening some flutes

until no light comes underneath the now straightened (flattened) rib.



Pete Cowper

RV8 #81139

Hanger B-5

Visalia Municipal Airport

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william.p.dube(at)noaa.go
Guest

Posted: Fri Mar 17, 2006 8:12 am Post subject: Over-fluting

I actually use the front edge of the workbench instead of the top. I 

hold the rib against the edge of the workbench as I flute. This is a 

natural position to grip the pliers. You can look down and see the gap 

narrow as you squeeze.



     Bill Dube'



Pete Cowper wrote:



 	  Quote: 	
		  



A tip to avoid over fluting is to lay the rib flat on the worktable

after marking each fluting location and kneel down so your eyes are at

table level looking under the rib toward the light from the open door.

As you squeeze the fluting pliers you will see the rib sink down to the

flat tabletop and the light coming under the bowed rib will disappear as

it flattens out.  Just gently move around the rib deepening some flutes

until no light comes underneath the now straightened (flattened) rib.



Pete Cowper

RV8 #81139

Hanger B-5

Visalia Municipal Airport

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