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Old 09-22-2015, 07:56 PM   #1
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1973 23' Safari
North of Boston , Massachusetts
Join Date: May 2002
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70's rear corners

So I'm thinking about replacing the pan soon (as part of my renovation). I was planning on just getting the stuff from airpartsinc, 4x12' sheets...fine for the flat sections between the main frame rails. The rear corner areas, outboard of the main frame rails, which span from the frame to the banana wraps...should these be the same material, or should they be alclad?
On my particular model, there isn't much aft of the wheel wells, but there is about a foot on the street side that needs to bend up and around the outriggers, attaching to the exterior wall of the trailer, so this is plainly visible from the side.
I'm wondering, is this original piece clear-coated alclad? It looks like a pretty close match to the rest of the exterior skin on the trailer. even though 90% of this piece of aluminum is the "underneath", facing straight down, and not visible, its all one single piece.
On the curb side, the only visible section that wraps up into the sidewalls is about 6-8" long; the rest of that space is consumed by the battery box. (aft of the box, its all banana wrap.).
So I'm wondering--what material for these pieces? Do people just use the 5055 non-alclad, or is that going to stick out and look funny?
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Old 09-25-2015, 06:45 AM   #2
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1973 23' Safari
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This piece (and the corresponding one on the other side):
I attached the banana wrap with clecos for clarification.
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Old 09-25-2015, 07:29 AM   #3
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1973 21' Globetrotter
Houston , Texas
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Well, there are a couple of threads running right now that discuss what type of aluminum the shells of AS in the 70's are made of. In '73, there is a good likelihood that your trailer is made of 6061 T6. The crux of the debate on the earlier mentioned threads is whether the Alcladding ended when AS switched over to 6061, or whther it is a 6061 Alclad--nobody seems to know for sure.

So when I redid my bellypan, I used 6061 T6 on a .032 thickness (non-alclad). It was tough (daunting) to make those curves where the pan wraps up to meet the shell. Luckily, I had bought an English Wheel on a whim, and that did the trick. I used 5055 on my interior, and that stuff is soft as butter--I don't think I would want to use it in an application where it might need ding-resistance. Whatever the completely curved banana wraps is made of, it is actually softer than butter. Mine were very dented, dinged, and deformed, but I got them straightened out. Tried to buff them a bit to see if they would take a shine, and concluded that there is no way (which, I think would argue against worrying about using Alclad on the belly skin).

http://www.airforums.com/forums/f441...al-141141.html

good luck!
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