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Old 10-25-2010, 07:27 PM   #1
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What Caused This on 2011?

Hi All,

In viewing some pics of 2011 27fb, noticed in the side views that there were these puckers in the skins directly above, in front of the forward axles. Curiously, these occur on both sides in the exact place.

Any ideas?
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Old 10-25-2010, 07:33 PM   #2
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I have noticed one such area on my 07 Classic. When the side is in direct sunlight, the skin expands and the "pucker" shows up. As soon as the sun passes overhead, the skin cools and it disappears. It comes and goes on any warm sunny day. Cloudy days, or when the awning is deployed, it never shows up.
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Old 10-25-2010, 07:41 PM   #3
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Our 25FB did the same. It would ripple in the sun just like that.
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Old 10-25-2010, 07:47 PM   #4
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Good to hear that this is a temporary situation. Thought I was seeing things at first, and then began wondering what the ## could cause that!
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Old 10-25-2010, 07:50 PM   #5
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I hope you are not buying it? I wouldn't. Something is wrong, the material should not change like that under any heating or cooling conditions.
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Old 10-25-2010, 07:51 PM   #6
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In fact you can see my wave if you blow up my avitar pic. Behind the wheels below the beltline. This pic was taken on a warm July day just before noon....by the shadows.
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Old 10-26-2010, 08:52 AM   #7
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The skin must have a little slack to expand or contract - otherwise if it were too rigid the rivets would pull. My 98 has the same pucker - and everything is nice and snug.

Pat
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Old 10-26-2010, 09:04 AM   #8
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Quote:
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I hope you are not buying it? I wouldn't. Something is wrong, the material should not change like that under any heating or cooling conditions.
Any metal will expand and contract under heat and cold. If restrained (riveted) it will be more noticable.
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Old 10-26-2010, 09:30 AM   #9
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I hope you are not buying it? I wouldn't. Something is wrong, the material should not change like that under any heating or cooling conditions.
The coefficient of linear expansion for Aluminum is significantly higher than steel or wood which are two of the other primary structural elements used in AS construction. When the trailer sides are warmed by direct sunlight I would expect some distortion to occur unless the manufacturer installed some type of expansion/slip joint, or the trailer was very short. The amount of pucker or buckle is going to be a function of the temperature at the time of build, skin restraint, and the exposure temperatures.

I would not like the look on my rig but the physics make sense.

Kevin
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Old 10-26-2010, 09:52 AM   #10
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Mine does the same thing, to a lesser degree, in direct sunlight, on a hot day........I decided to watch it for a while before I open that potential can of worms with Airstream.
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Old 10-26-2010, 10:19 AM   #11
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I usually watch for it while I open a potential can of beer! It's characteristic of the material and build method. Not an issue. Part of what makes a Stream a stream....rivits as opposed to staples and slip joints on SOBs.
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Old 10-26-2010, 11:29 AM   #12
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I've seen this on mine at times, pretty much in the same location as the posted photos. It comes and goes depending on temperature.

My trailer also makes expansion/contraction sounds. They're light sounds but I always can tell when the sun first hits the trailer in the morning just by listening.
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Old 10-26-2010, 11:53 AM   #13
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Thank you all for your replies. It is good to know that when a ?? arises, that there is tons of experience in this forum to set me straight. We pick up our baby in a couple of weeks, and will definitely watch this issue. Definitely will be getting the awning package, when I take it up to Airstream for the first time, and I know there will be warranty items that will have to be taken care of.

Good news is that this trailer was manufactured late August, so filliform and other corrosion issues will not be as much of a factor. We are having the wifi kit that Colonial installs, put on the trailer, so Netflix and Apple TV, here we come.

Will keep all up to date with pics when we take delivery. This is a new color scheme called mica, so it should be fun.
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Old 10-26-2010, 02:23 PM   #14
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We're all on the edge of our seats, waiting to hear all the news and see all your pics.

Happy trails.

Pat
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