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Old 09-09-2015, 03:06 PM   #1
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Unhappy Floor "rumbles" when walking in trailer

We have a '14 27FB Classic with a noisy floor.

When we walk back and forth between the galley and living room the floor makes a noise similar to high school "theater thunder" that is created by flexing a piece of sheet metal. I have traced our noise to oil canning of the thin sheet aluminum that covers the bottom of the frame. Dealer says it's what Airstreams do. I have my doubts-this is our third AS, our first with this noise.

It seems to me that a fix could include one or two aluminum bars or angles screwed or riveted lengthwise between the frame's cross braces in the flexing portions of the metal, perhaps with rubber tape sandwiched between.

Opinions?
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Old 09-10-2015, 11:08 AM   #2
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Have someone Walk in the trailer while you are outside listening underneath the trailer. Place your hand on the bellypan where you hear noise. Do you "feel" the aluminum flexing?
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Old 09-10-2015, 09:22 PM   #3
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Dealer is full of bs.
Adding some rivets to the cross members may help. The length wise reinforcement you mention would also likely work. Simply riveting some straight flat aluminum bar should serve the function, angle wouldn't be necessary. Rivet it regularly along the length. If you have a steel supply company nearby you should be able to get aluminum bar stock from them. I just bought 25' of 1/8" thick x1.5" aluminum angle for $32, so bar stock should be cheaper. It'll still oil can, but the reinforcement will stop the 'pop' when it does, thus stopping the noise.
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Old 09-10-2015, 09:27 PM   #4
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Using the stabilizers can also help reduce the oil canning. You don't want to lift the trailer but getting them down with some load, couple hundred pounds, pushing up and not merely touching should help keep the end from dropping from the persons weight on it, causing the metal to flex.
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Old 09-10-2015, 09:29 PM   #5
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Some 'oil can' some don't. Might be more prevalent in longer trailers. My 25FC had the noise. Haven't heard it in my Classic.

Not sure I would want to rivet the bottom since the trailer does flex. One of the solutions was to use a wedge roller and put some creases in it to tighten it up. Probably got the tool wrong but you get the idea.
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Old 09-10-2015, 09:41 PM   #6
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it's common. Can-Am Airstream in Ontario came up with an innovative fix. They have taken a window screen spline roller tool, used it to put a large X-crease in each underbody panel.

Apparently that takes up any slack in the panel when it expands from heat or stabilizer adjustment, and allows the panel to contract. I would imagine the time to put the crease in would be in warm weather when the panels are expanded.

We just ignore it, tends to be there in warm weather, gone in cooler weather.
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Old 09-11-2015, 11:32 AM   #7
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We just ignore it.
It seems to be worse if the stabilizers are not down. I often camp with the trailer still attached to the tow vehicle and the stabilizers up, especially if it is just an overnight or if I am by myself.
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Old 09-11-2015, 12:02 PM   #8
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Quote:
Originally Posted by dkottum View Post
it's common. Can-Am Airstream in Ontario came up with an innovative fix. They have taken a window screen spline roller tool, used it to put a large X-crease in each underbody panel.

Apparently that takes up any slack in the panel when it expands from heat or stabilizer adjustment, and allows the panel to contract. I would imagine the time to put the crease in would be in warm weather when the panels are expanded.

We just ignore it, tends to be there in warm weather, gone in cooler weather.
Wow that's simple. But it's thin metal. If you look at metal heating & air ducts the bigger sections always have that "X" creased into them but it's done with a metal brake. It's done to minimize vibraton in vents too! I might have thought it would be necessary to remove the belly pan, take it to a metal shop and have them whack it with the brake.

I like your way better.

Paula
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Old 09-11-2015, 12:50 PM   #9
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Sound like a logical and simple fix. Just be alert what may be hidden on above

Quote:
Originally Posted by biyak269 View Post
we have a '14 27fb classic with a noisy floor.

When we walk back and forth between the galley and living room the floor makes a noise similar to high school "theater thunder" that is created by flexing a piece of sheet metal. I have traced our noise to oil canning of the thin sheet aluminum that covers the bottom of the frame. Dealer says it's what airstreams do. I have my doubts-this is our third as, our first with this noise.

It seems to me that a fix could include one or two aluminum bars or angles screwed or riveted lengthwise between the frame's cross braces in the flexing portions of the metal, perhaps with rubber tape sandwiched between.

Opinions?
sound like a logical and simple fix. Just be alert what may be hidden on the other side. May also want to pre paint the angled bar .
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Old 09-11-2015, 04:24 PM   #10
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I have a 32' and also have some oil can drumming. It happens inconsistently though, so like the other posts say temperature and use of stabilizers play a role.
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Old 09-11-2015, 04:43 PM   #11
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Don't fix it, don't worry about it, be proud, it's an Airstream! Not a SOB out there with a metal bottom.
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Old 09-12-2015, 09:30 AM   #12
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Our 2013 International CCD 30 is currently at Colonial Airstream having some warranty work done and they will address this issue. We hear the same noise when walking in the galley area, but has been entirely unpredictable: stabilizers up or down, tanks full or empty, outside temperature hot, warm, or cold.
Will post again with details of "the fix" after we pick up our trailer in a couple of weeks and have had a chance to test for results.
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Old 09-12-2015, 10:16 AM   #13
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My 27 FB FC does it too. Sometimes. It would be nice if it didn't, but it's not that big a deal.

Mike
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Old 09-12-2015, 03:27 PM   #14
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We had the factory fix the "tin cannning" issue

We also have owned multiple Airstream trailers and we never had this issue. With our new 2014 27FB we noticed that we had this "annoyance" (not really a real problem). Since we had some other minor issues we had the factory resolve this along with everything else as warranty items. They basically ran several rivets across the aluminum underbelly - two straight lines from one side to the other. So far it seems to have eliminated the noises, but the real test will be when the weather turns colder (when the noise seems to be more noticeable). Not sure if local dealers can do this, or how much it would cost if not covered under warranty. I understand your concern - we LOVE our Airstream and its quality level, but making it even more perfect was worth it to us.
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