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Wing skin stringers

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K Dilks

Joined: 22 Sep 2008
Posts: 108
Location: UK

Posted: Tue Feb 17, 2009 5:47 am Post subject: Wing skin stringers

I am now fitting a row of lower skin stringers ( anti oil canning ).

 I have 2024 T3 L sections made up.My question to all is on ZAC planes they say  100mm rivet spacing on the upper skin stringers but to me that is way to big on a A4 rivet.  

Im looking at doing 52mm spacing but then I run into odd numbers  between the outer ribs. 

Any thoughts on this, I will fit 2 rows to the upper skin also.

 Thanks 

kev

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rsteele(at)rjsit.com
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Posted: Tue Feb 17, 2009 6:51 am Post subject: Wing skin stringers

The 650 plans don't show the anti-oil canning L channel on the bottom  

of the wing.  I think it's considered cosmetic only, so there really  

is no point.



I suppose it's possible that channel on the bottom might actually take  

load.   I wouldn't like to guess about rivet spacing for such an  

application.



Ron



On Feb 17, 2009, at 8:47 AM, K Dilks wrote:



 	  Quote: 	
		   

 <kevin.dilks(at)liwest.at>



 I am now fitting a row of lower skin stringers ( anti oil canning ).

 I have 2024 T3 L sections made up.My question to all is on ZAC  

 planes they say  100mm rivet spacing on the upper skin stringers but  

 to me that is way to big on a A4 rivet.

 Im looking at doing 52mm spacing but then I run into odd numbers   

 between the outer ribs.

 Any thoughts on this, I will fit 2 rows to the upper skin also.

 Thanks

 kev



 --------

 Austria .............





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 http://forums.matronics.com/viewtopic.php?p 30639#230639

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Gig Giacona

Joined: 10 Jan 2006
Posts: 1416
Location: El Dorado Arkansas USA

Posted: Tue Feb 17, 2009 7:23 am Post subject: Re: Wing skin stringers

 	  K Dilks wrote: 	
		  I am now fitting a row of lower skin stringers ( anti oil canning ).

 I have 2024 T3 L sections made up.My question to all is on ZAC planes they say  100mm rivet spacing on the upper skin stringers but to me that is way to big on a A4 rivet.  

Im looking at doing 52mm spacing but then I run into odd numbers  between the outer ribs. 

Any thoughts on this, I will fit 2 rows to the upper skin also.

 Thanks 

kev 	




This mod isn't designed to add any strength to the wing just to keep it from oil canning. I think the logical option would be to go with the widest spacing that will fit evenly. If you find that they are spaced to far apart to do what they are there to correct then add a rivet half way between the first set.

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W.R. "Gig" Giacona
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daveaustin2(at)primus.ca
Guest

Posted: Tue Feb 17, 2009 1:10 pm Post subject: Wing skin stringers

Is it wise to put wo diferent alloys next to each other?  Why not go with 

6061-T6 stringers?

Dave Austin  601HDS - 912

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larry(at)macsmachine.com
Guest

Posted: Tue Feb 17, 2009 1:51 pm Post subject: Wing skin stringers

If you prime them, Dave,

the difference in alloy won't make a difference. Better to prime even 

between alloys that are alike.

Moisture in today's condensate contains minute amounts of material that 

corrodes aluminum.



Larry McFarland 601HDS at www.macsmachine.com



Dave Austin wrote:

 	  Quote: 	
		   

 <daveaustin2(at)primus.ca>



 Is it wise to put wo diferent alloys next to each other?  Why not go 

 with 6061-T6 stringers?

 Dave Austin  601HDS - 912

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