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Old 03-08-2016, 11:14 AM   #21
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The locking mechanism is adjustable for a snug fit.
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Old 03-08-2016, 04:35 PM   #22
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I don't know if your "fixed" post was before or after I stopped to see you along TX 118, but if you are still having a problem something you might try it to stack "stuff" in the center of the box so that it lightly touched the underside of the top cover. If the vibration is the top cover flexing with the air flow from the tow vehicle, the pressure from underneath might do the trick.

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Old 03-08-2016, 04:40 PM   #23
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Vibration when towing our new Escape 21

At the Matagorda Madness rally we spoke to a couple with a brand new 21 that also had vibration problems from the storage box. In their case, the box itself was wobbling back and forth - it wasn't the lid. I suggested wedging a piece of high density foam between the box and the trailer and it solved their problem.
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Old 03-08-2016, 05:25 PM   #24
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Hi, Jon. My post was prior to leaving Alpine. The lid felt snug and I was hopeful. Your idea about supporting the center from underneath is worth a shot. Skip thinks (at this point) that air is coming in from the rear edges... Maybe. No vibration if we keep the speed at or below 61 mph. That's not horrible, and we may be happier with our mpg, too.

Another thing is stuff inside the box gets banged around: we bought a bag of blocks in late September, and granted the bag is thin nylon and a tight fit, but it already has holes in it, as if it's 10 or more years old. So maybe it's the entire box that's vibrating- but it sure seems the lid is flexing to get the whole thing moving. Maybe.

Thanks again for stopping and helping us troubleshoot!!
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Old 03-08-2016, 05:29 PM   #25
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My nylon bag split the first time I tried putting all the blocks back into the bag.
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Old 03-08-2016, 05:30 PM   #26
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Robert, at Mat Madness, did y'all verify that the box was not loose? That's the next thing we'll check, to be sure the bolts at the bottom are snug.
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Old 03-08-2016, 05:37 PM   #27
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Quote:
Originally Posted by Mary F View Post
So maybe it's the entire box that's vibrating- but it sure seems the lid is flexing to get the whole thing moving. Maybe.
I just read through this thread for the first time, and what you say here makes good sense, along with the foam fix in the box Robert suggested belong too.

Though adjusting the lid catches can reduce or eliminate the noticeable vibrations, this may likely be just a symptom, and not the cause. If the box itself vibrates, this could be more noticeably seen in the hinged lid.

The box itself is modestly flexible, way more than the fibreglass shell it due to the open top. It could be the vibrations are very modest ones in the frame from the tires on n the road, and this is transferred through the box, to the lid.

Maybe some kind of shock absorbing mount could be the solution.

Just another thought.
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Old 03-08-2016, 05:47 PM   #28
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Originally Posted by rbryan4 View Post
I suggested wedging a piece of high density foam between the box and the trailer and it solved their problem.
That would be a short term solution but long term it could cause a problem. If there is differential movement and road grit gets on the foam it could scuff up the gelcoat.

I'd make sure the box is as solidly connected to the frame as possible and also put a foam strip on the underside of the lid. I'd use a foam (like weather stripping foam) thick enough that you had to compress it slightly to put the hasp on.

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Old 03-09-2016, 12:07 PM   #29
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Another wrinkle

Last night we noticed the rivet holding the center brace was broken. Again wonder if it's a cause or a symptom.
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Old 03-09-2016, 12:30 PM   #30
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One rivet installed like that isn't very strong. Two would have been better.

Also, I see rivets have been installed through the f.g. without a backing washer. Normally pop rivets that go through two layers of metal don't require anything on the end that "mushrooms". When using soft material, normally a washer is installed so that the force of the rivet is spread over a wider area. Personally I regard the resin as a semi-soft material and would have used a backing washer.

Don't know the function of those rivets but if they are load bearing I'd do that mod as well as add at least one more rivet to the area where the rivet failed.

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