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Another wing build question--wing walk doublers

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william(at)gbta.net
Guest

Posted: Mon Jan 25, 2010 11:06 am Post subject: Another wing build question--wing walk doublers

On page 16-2 step 3.  The second part of this step  has us dimple the aft most screw hole for a #8 flush head screw.  Easy  enough.  Next it asks us to machine countersink the rest of the screw holes  for a #8 flush head screw dimple.  Do we countersink the skin- or- the wing  walk doublers underneath of the skin and just dimple the skin?

  

 Next question is the last part of the step.  We are  asked to machine countersink all the rivet holes that correspond to the W-1027A  and W-1027B wing walk doublers for the head of an AN426AD3 rivet.  Again,  do we countersink the skin or just countersink the doublers and dimple the  skin?

  

 Thanks in advance,

 Bill

  

 RV-10 wings

   [quote][b]

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John Kirkland

Joined: 13 Jan 2006
Posts: 19
Location: South Weber, UT

Posted: Mon Jan 25, 2010 11:19 am Post subject: Re: Another wing build question--wing walk doublers

Countersink the skin and doubler, nothing gets dimpled. Use a piece of scrap with a #8 dimple as a test piece to judge how much to countersink. The test dimple needs to fit in the countersink, just like the fairing will when you have the wings mounted. Otherwise, the fairing that covers the gap between wing and fuselage will sit high.

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RV-10 #40333
N540XP (reserved)

rleffler

Joined: 05 Nov 2006
Posts: 680

Posted: Mon Jan 25, 2010 11:41 am Post subject: Another wing build question--wing walk doublers

Bill,  

   

Just countersink the skin.  The doublers should be in place.  If the countersink bit has to cut any of the doubler to get the proper depth, it will.   As you know, with a countersink, the bottom of the wing skin will be flush, so there is no need to dimple or countersink the doubler directly.  

   

Same procedure for both operations.  

   

Bob  

   

       

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Billy & Tami Britton

 Sent: Monday, January 25, 2010 2:05 PM

 To: rv10-list(at)matronics.com

 Subject: Another wing build question--wing walk doublers  

  

  

     

On page 16-2 step 3.  The second part of this step has us dimple the aft most screw hole for a #8 flush head screw.  Easy enough.  Next it asks us to machine countersink the rest of the screw holes for a #8 flush head screw dimple.  Do we countersink the skin- or- the wing walk doublers underneath of the skin and just dimple the skin?  

    

   

    

Next question is the last part of the step.  We are asked to machine countersink all the rivet holes that correspond to the W-1027A and W-1027B wing walk doublers for the head of an AN426AD3 rivet.  Again, do we countersink the skin or just countersink the doublers and dimple the skin?  

    

   

    

Thanks in advance,  

    

Bill  

    

   

    

RV-10 wings  

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_________________
Bob Leffler
N410BL - Phase I
http://mykitlog.com/rleffler

william(at)gbta.net
Guest

Posted: Tue Jan 26, 2010 9:19 am Post subject: Another wing build question--wing walk doublers

So all the skin to doubler holes for the AN426 rivets get countersunk right 

through the skin also?  This won't remove too much of the skin to let the 

rivet work properly?



Bill



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

From: "John Kirkland" <jskirkland(at)webpipe.net>

Sent: Monday, January 25, 2010 1:19 PM

To: <rv10-list(at)matronics.com>

Subject: Re: Another wing build question--wing walk doublers



 	  Quote: 	
		   



 Countersink the skin and doubler, nothing gets dimpled. Use a piece of 

 scrap with a #8 dimple as a test piece to judge how much to countersink. 

 The test dimple needs to fit in the countersink, just like the fairing 

 will when you have the wings mounted. Otherwise, the fairing that covers 

 the gap between wing and fuselage will sit high.



 --------

 RV-10 #40333

 N540XP (reserved)





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p 83401#283401






	


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 Checked by AVG - www.avg.com

 01:36:00

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rleffler

Joined: 05 Nov 2006
Posts: 680

Posted: Tue Jan 26, 2010 10:24 am Post subject: Another wing build question--wing walk doublers

Correct......



There is nothing unique with countersinking these rivets as opposed to any

that you've done previously.



You do want to test the setting of your countersink cage on a piece of scrap

first.



Bob

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Bob Leffler
N410BL - Phase I
http://mykitlog.com/rleffler

Sstella(at)incisaledge.co
Guest

Posted: Tue Jan 26, 2010 10:31 am Post subject: Another wing build question--wing walk doublers

When you countersink the skin it will take a little off the doubler but it

will leave plenty on the skin for the rivet.



Steve Stella

40654 Wings

N521RV reserved



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william(at)gbta.net
Guest

Posted: Tue Jan 26, 2010 2:31 pm Post subject: Another wing build question--wing walk doublers

Thanks to all that replied.   Also sorry for the "simple" question.  I just 

wanted to be sure I was doing the right thing and not destroying the wing 

skins.



Bill



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

From: "Steve Stella" <Sstella(at)incisaledge.com>

Sent: Tuesday, January 26, 2010 12:31 PM

To: <rv10-list(at)matronics.com>

Subject: RE: Re: Another wing build question--wing walk doublers



[quote] 



 When you countersink the skin it will take a little off the doubler but it

 will leave plenty on the skin for the rivet.



 Steve Stella

 40654 Wings

 N521RV reserved



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bwestfall

Joined: 22 Oct 2008
Posts: 131
Location: Portland, OR

Posted: Tue Jan 26, 2010 8:08 pm Post subject: Another wing build question--wing walk doublers

Bill don't sweat it if you think it's a simple question.  I recall mulling

over the plans one too many times in that section.  It isn't entirely

obvious till a) you complete it and have a good mental picture or b) you

f-up a part or 3 and end up redoing it enough times to have memorized each

part by feel with your beat up callous hands from all the extra effort.



-Ben Westfall

Do not archive

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