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  #1  
Old 04-02-2017, 03:29 PM
Mark Jackson Mark Jackson is offline
 
Join Date: Oct 2009
Location: Houston
Posts: 53
Default Attaching RV-8 leading edges

I started trying to rivet the completed leading edges to the wing spar. Complete debacle. I used an offset head on the rivet gun (see pic). Inside, held the bucking bar against the rivet as per the pic below. The first set were okay not great but on the second set where I really had to reach in, they were all horrible. Drilled out all five. I have searched the threads and there really isn't very much on this.

Using AN470D4-5 as per the plans. Same bucking bar and rivet gun as always.

Is there some secret trick to this I don't know.

Rivet gun position:



Bucking bar position:



Result:



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Houston, TX
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  #2  
Old 04-02-2017, 03:39 PM
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wirejock wirejock is offline
 
Join Date: Oct 2005
Location: Estes Park, CO
Posts: 2,849
Default Secret

Quote:
Originally Posted by Mark Jackson View Post
I started trying to rivet the completed leading edges to the wing spar. Complete debacle. I used an offset head on the rivet gun (see pic). Inside, held the bucking bar against the rivet as per the pic below. The first set were okay not great but on the second set where I really had to reach in, they were all horrible. Drilled out all five. I have searched the threads and there really isn't very much on this.

Using AN470D4-5 as per the plans. Same bucking bar and rivet gun as always.

Is there some secret trick to this I don't know.
I don't know any secret but that's exactly why I called Vans and asked about pulled rivets. I didn't want to cause damage. LP4-3 and LP4-4 was the recommendation.
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Larry Larson
Estes Park, CO
http://wirejockrv7a.blogspot.com
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Donated 12/01/2017. Plus a little extra.
RV-7A #73391, N511RV reserved (1,800+ hours)
HS SB, empennage, tanks, wings, fuse, working finishing kit
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I cannot be, nor will I be, held responsible if you try to do the same things I do and it does not work and/or causes you loss, injury, or even death in the process.
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  #3  
Old 04-02-2017, 04:13 PM
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sapeloson sapeloson is offline
 
Join Date: Nov 2009
Location: Jesup, GA
Posts: 141
Default Same!

Had the same issues....... Same solution......


Quote:
Originally Posted by wirejock View Post
I don't know any secret but that's exactly why I called Vans and asked about pulled rivets. I didn't want to cause damage. LP4-3 and LP4-4 was the recommendation.
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  #4  
Old 04-02-2017, 04:24 PM
RV74ME RV74ME is offline
 
Join Date: Dec 2015
Location: Auburn, AL
Posts: 89
Default OR, you can try this on your second wing

This won't help you on your first wing, but this is what I did on my second wing:


http://www.vansairforce.com/communit...d.php?t=146965
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  #5  
Old 04-02-2017, 04:25 PM
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Carl Froehlich Carl Froehlich is offline
 
Join Date: Dec 2007
Location: Dogwood Airpark (VA42)
Posts: 1,314
Default

I suggest wrong rivet gun, wrong rivet set, and wrong bucking bar.

Try a 2X gun and a long but straight set - at around 45 PSIG. You want a palm type bucking bar that you can "feel" when properly positioned on the rivet.

Don't forget to add the 2 or 3 layers of masking tape to the rivet set. Replace the tape after 3-4 rivets.

Carl
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  #6  
Old 04-02-2017, 05:19 PM
ILikePike ILikePike is offline
 
Join Date: Jan 2011
Location: Eatonton, GA
Posts: 195
Default

I did my first wing vertical on the jig like your pictures. I had trouble getting these rivets set. The second wing I did horizontal with the same rivet gun, set, and bucking bar. For some reason working horizontally I was able to drive them with ease compared to the cursing required to drive them vertically. I hope this helps.
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  #7  
Old 04-02-2017, 07:54 PM
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Wunderon Wunderon is offline
 
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Location: Seattle (Edmonds) and Iowa
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LP4-3 and LP4-4
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  #8  
Old 04-02-2017, 08:03 PM
Mark Jackson Mark Jackson is offline
 
Join Date: Oct 2009
Location: Houston
Posts: 53
Default Attaching RV-8 leading edges

Okay. I took apart the air hose, inserted all the regulators I use for HVLP painting so I was getting exactly 40 psi at the rivet gun.

Then I used the angled rivet driver:



Much much better results. Not perfect but acceptable.



I am going to call Van's tomorrow to get the specs for blind rivets for two of the ribs that would require completely blind bucking.
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  #9  
Old 04-03-2017, 01:51 PM
StuBob StuBob is offline
 
Join Date: Oct 2015
Location: Indianapolis, IN
Posts: 248
Default

RE: Blind rivets

What rivet puller will fit in there? The one I have is too thick and, with main ribs in place, won't put the heads down flat.
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  #10  
Old 04-03-2017, 02:50 PM
jibby212 jibby212 is offline
 
Join Date: Oct 2014
Location: Sarasota Fl
Posts: 88
Default

I read somewhere that it was possible to shoot all the rivets from the front side of the spar so I tried it and succeeded. I had to use a remote regulator and on occasion insert the gun and the the air hose from a different hole but I think it was easier than shooting them from the back side so close to the aft ribs. My arms are not that big and if they were any bigger it would have been impossible. It seems that this area could have had some minor design changes to make everything a lot easier, for one, facing the outboard and inboard end rib flanges the other way so that they could be put on last.
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