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Old 06-10-2006, 12:24 AM   #1
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More riveting pictures -- backsides

So, my trailer has a lot of both of these types of rivets thru the exterior panels.

One type looks like pix I've seen posted of solid bucked rivets, altho I thought back end would be more "squished out."

But what are the other type called? Back end looks like a tiny hollow cylinder, about same size as back end of solid rivets. Anyone else have these?
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Old 06-10-2006, 12:29 AM   #2
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The first picture looks like regular bucked rivets. These are correct for exterior and decorative interior use.
The second picture looks like pop rivets. Those shold not be used for any exterior panels. They leak.
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Old 06-10-2006, 12:37 AM   #3
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But they're solid on the outside, look just like the bucked rivets -- even have the little tiny "dimple" that's supposed to be the mark of a "hard" vs."soft" rivet. Not sure how they could leak???
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Old 06-10-2006, 01:24 AM   #4
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Do my eye's deceive me???

I am curious.

In the second photo, along the bottom of the upper panel line, I see what looks like shear/ snip marks.

Also the rivet line looks kinds far away from the panel edge.

Additionally, there doesn't seem to be a factory 'look' to the finished edge.

Also the finish on the 2 photos is remarkably dissimilar. Polishing your baby?

Then again, I don't really know beans, in a substantive sense, about these vintage trailers....

So, do my eye's deceive me???

Axel
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Old 06-10-2006, 02:01 AM   #5
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These pictures are taken from the inside of the outer skin panels -- my trailer is currently stripped to the bones! The outside seams and rivets look just as you'd expect.
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Old 06-10-2006, 05:25 AM   #6
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Could those "funny" rivets that look like pop rivets on the inside, but solid on the outside, be some kind of shaved pop rivet like an Olypic? They certainly aren't Olmpics, but it they had just the right hardness in the mandrel, it might be difficult at first glance to see that they were shaved.

Can you see a "button" in the hole on the inside?

Just thinking out loud here.....
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Old 06-10-2006, 06:38 AM   #7
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They look like...

CherryMax or CherryLock rivets available from Textron Aerospace, but they could be Olympics as well.

Not all buck rivets had dimples, they're usually WW2 surplus and lasted into the early 60's- and look closely around the center and out to the edge of the rivet for slight discoloration, as a shaved rivet will have a little area that you can see the difference between the shaved shank and the domed rivet. When polished this color variance is blended even further.

From the inside views, you definitely have a repaired panel, and it even looks like there was less or no Vulkem used on it. If it was an "outside" repair- which is why they used CherryMax or Olympics, then the Vulkem or sealant would be possibly beaded on closer to the actual seam on the outside.

I guess the dealer/re-seller never admitted to you that the trailer was possibly wrecked, damaged, and repaired, and you have no idea to what extent it was damaged, unless you pull it all apart and view it from the inside out all the way around and up underneath.

You're to be commended for doing as you are to that trailer- I know its a lot of work and the dealer wasn't upfront and honest with you, so what you're doing is expensive and takes a lot of heart. Good luck with it!
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Old 06-10-2006, 06:41 AM   #8
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Lynne,

Those are called semi-tubular rivets. The design is meant to curl over the tubular section, rather than expand the shank as in solid rivets.

They were used by the factory in very limited applications. I found a few (less than 3) in my trailer.

It could be they were easier to set in confined locations because they use a different setting tool, but I'm just guessing about that. Also, the location you show was obviously not confined, and they were set with a regular bucking bar.

http://www.orbitform.com/eng/tubular-data.htm
http://www.njrivet.com/setting/
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Old 06-11-2006, 02:27 AM   #9
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So? Am I? Or not?

My eyes deceived? Or not?

Still curious.

Axel
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Old 06-11-2006, 09:42 AM   #10
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Those are explosive rivets.They were used to do a repair without access from inside similar to the Olympics today.They had a small explosive charge in the hollow bottom and were set using a soldering iron.The main drawback was you had to get the length right or they would not set right.They were the cause of many leaks on my trailer.
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Old 06-11-2006, 11:19 AM   #11
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Greg,

That's incredible. Where do you find these things?

You are an encyclopedia of information!
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Old 06-11-2006, 04:56 PM   #12
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Why...

did you strip this unit?
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Old 06-11-2006, 06:22 PM   #13
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I don't know if they are still available but would shy away from them as they are very soft and cause a lot of leaks.The first winter after I had the shell on the new floor I found many leaks ,in the roof, and all were caused by these rivets.They had been installed by PO when several sheets on top were replaced after a tree had fallen on trailer.
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