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Fuselage Side Skin Dimpling

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ogdenk

Joined: 05 Feb 2007
Posts: 41
Location: Syracuse, NY

Posted: Sun May 01, 2016 3:02 pm Post subject: Fuselage Side Skin Dimpling

I have a question about the fuselage mid side skin dimpling.  The instructions say to dimple all of the 3/32" holes that were drilled to the understructure.  However, the corresponding holes in the F-1015A outboard seat ribs were not dimpled.  They weren't specifically excluded from dimpling, but there was no step where they were dimpled so I didn't do it.  This is the outboard rib immediately aft of the spar carry through.  I have attached a clip of from the construction manual of this area.  The holes in the F-1018 rear seat ribs (the next rib aft of the problem ribs) WERE dimpled as per the instructions.



It's going to be a pain to try and dimple those holes now.  It looks like many of them will be hidden in the wing root area so I was thinking of using AN470 rivets in those holes instead of AN426.  It looks like some of the holes will be above the wing though, so I will have to figure out a way to dimple those holes or countersink them.  I do have a tight fit dimpling set that uses a rivet puller, but the performance is barely acceptable on thinner material.  I will probably call Vans on this but I was wondering if others have dealt with this issue and what the resolution was.



Thanks for any thoughts/suggestions.



Kent Ogden



#40710

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Tim Olson

Joined: 25 Jan 2007
Posts: 2878

Posted: Sun May 01, 2016 7:35 pm Post subject: Fuselage Side Skin Dimpling

Hi Kent,



I don't remember the specific rib part numbers or anything, so this is

sort of off the cuff, but...



For the rivets that will be hidden in the wing root area, I don't see why

AN470's wouldn't be fine. I think the RV-14 kit used a lot of AN470's there.



And, if you have an area where you have a handful of rivets that are

visible and you want flush rivets, I don't think I'd worry too much about

countersinking a few of them if necessary.  I too don't have great luck

with the pop-rivet dimple die set.  I did just tonight pull out a vice-grips

dimple die to get some real tight ones...it's a vice grips with dimple dies

welded to them.  If you have one of those maybe pull it out.

It's a handy tool when you need it.



At any rate, I wouldn't stress out too much if you're only looking to

countersink a handful

Tim

On 5/1/2016 6:02 PM, Kent Ogden wrote:

 	  Quote: 	
		   I have a question about the fuselage mid side skin dimpling.  The 

 instructions say to dimple all of the 3/32" holes that were drilled to 

 the understructure.  However, the corresponding holes in the F-1015A 

 outboard seat ribs were not dimpled.  They weren't specifically 

 excluded from dimpling, but there was no step where they were dimpled 

 so I didn't do it.  This is the outboard rib immediately aft of the 

 spar carry through.  I have attached a clip of from the construction 

 manual of this area.  The holes in the F-1018 rear seat ribs (the next 

 rib aft of the problem ribs) WERE dimpled as per the instructions.



 It's going to be a pain to try and dimple those holes now.  It looks 

 like many of them will be hidden in the wing root area so I was 

 thinking of using AN470 rivets in those holes instead of AN426.  It 

 looks like some of the holes will be above the wing though, so I will 

 have to figure out a way to dimple those holes or countersink them.  I 

 do have a tight fit dimpling set that uses a rivet puller, but the 

 performance is barely acceptable on thinner material.  I will probably 

 call Vans on this but I was wondering if others have dealt with this 

 issue and what the resolution was.



 Thanks for any thoughts/suggestions.



 Kent Ogden



 #40710

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jack(at)bedfordlandings.c
Guest

Posted: Mon May 02, 2016 3:48 am Post subject: Fuselage Side Skin Dimpling

Hi Kent,

 

I’m at this stage myself.  I thought about using AN470s but the skin has already been dimpled.  I used the pop rivet dimpler where I could, and when I couldn’t I used a machine countersink – it’s been a couple of weeks since I did this and now the skins have been riveted on, but as I recall there were only 4 holes where the substructure was too thick to use the pop rivet dimpling tool.  I countersunk those 4 holes and the countersink did not penetrate too far in the inside-most piece of structure to prevent forming a good shop head on the rivet.

 

The pop-rivet dimpler works ok on the rest of the holes.

 

Jack Phillips

#40610

Smith Mountain Lake, Virginia

Fuselage

 

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Kent Ogden

Sent: Sunday, May 1, 2016 7:02 PM

To: rv10-list(at)matronics.com

Subject: Fuselage Side Skin Dimpling

 

I have a question about the fuselage mid side skin dimpling.  The instructions say to dimple all of the 3/32" holes that were drilled to the understructure.  However, the corresponding holes in the F-1015A outboard seat ribs were not dimpled.  They weren't specifically excluded from dimpling, but there was no step where they were dimpled so I didn't do it.  This is the outboard rib immediately aft of the spar carry through.  I have attached a clip of from the construction manual of this area.  The holes in the F-1018 rear seat ribs (the next rib aft of the problem ribs) WERE dimpled as per the instructions.



It's going to be a pain to try and dimple those holes now.  It looks like many of them will be hidden in the wing root area so I was thinking of using AN470 rivets in those holes instead of AN426.  It looks like some of the holes will be above the wing though, so I will have to figure out a way to dimple those holes or countersink them.  I do have a tight fit dimpling set that uses a rivet puller, but the performance is barely acceptable on thinner material.  I will probably call Vans on this but I was wondering if others have dealt with this issue and what the resolution was.



Thanks for any thoughts/suggestions.



Kent Ogden



#40710

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Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?RV10-List

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