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Old 03-21-2014, 05:53 PM   #1
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Part from slide topper. what's it do?

Anyone know what this is for??? it broke on my slide topper while going down the highway at 65 miles an hour.. Topped

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unfurled a little bit , otherwise no damage I can see.
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Old 03-21-2014, 05:55 PM   #2
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It's an anti billowing device.

okay... what does this part do?
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Old 03-21-2014, 06:12 PM   #3
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Right, it keeps the topper from making like a parachute at highway speed, and I've seen it happen. Just put it back on.
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Old 03-21-2014, 07:26 PM   #4
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Probably did what it could in the wind. I had one break a few years back.

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Old 03-21-2014, 07:40 PM   #5
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Unfortunately a portion of it broke off . can't reuse it.
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Old 03-21-2014, 07:40 PM   #6
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Thanks for the info..
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Old 03-21-2014, 07:45 PM   #7
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It's meant to be mounted on the awning tube as this picture shows and should be positioned pointing straight up. You will probably see the screw holes were it was previously mounted.
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Old 03-21-2014, 09:40 PM   #8
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Looks like a nice protrusion that can catch on a tree limb...... and break off. Hard to understand how engineers come up with these things
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Old 03-22-2014, 03:30 AM   #9
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It's meant to be mounted on the awning tube as this picture shows and should be positioned pointing straight up. You will probably see the screw holes were it was previously mounted.
Thanks for that. One of our sticks out side ways and I did wonder if this was right, ladder time me thinks as apart from reducing it's effectiveness it leaves it more prone to getting knocked off.
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Old 03-22-2014, 04:03 PM   #10
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A&E slide toppers here and mine are not installed straight up. They are almost straight out - pointing down just a few degrees. They came from the Winnebago factory that way. One arm broke a couple of years ago and was replaced at the factory pointing the same way. It may depend on the topper manufacturer. They do work well - i have heard one hitting the striker plate on the side of the coach in a very strong cross wind a couple of times.
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Old 03-23-2014, 04:09 AM   #11
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It's a $30 part in most places. Billow preventer is the most common name I found when I had to replace mine. Mine aren't straight up. There is a "nub" on the side of the coach that's meant to be a "stopper" in situations where wind gets under the topper and starts to billow. The arm should hit the nub almost immediately. When the topper gets more slack in it, the situation just gets worse. When you deploy the slide, even 1", the preventer will clear the nub and all is good. With the slide in, the arm hits the nub if the topper tries to unfurl.

Lost one in a hurricane in Newfoundland, of all places. First 'cane to hit there in 30yrs.

Go figure

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Old 03-23-2014, 05:51 AM   #12
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It's a $30 part in most places. Billow preventer is the most common name I found when I had to replace mine. Mine aren't straight up. There is a "nub" on the side of the coach that's meant to be a "stopper" in situations where wind gets under the topper and starts to billow. The arm should hit the nub almost immediately. When the topper gets more slack in it, the situation just gets worse. When you deploy the slide, even 1", the preventer will clear the nub and all is good. With the slide in, the arm hits the nub if the topper tries to unfurl.

Lost one in a hurricane in Newfoundland, of all places. First 'cane to hit there in 30yrs.

Go figure

Jim
You are correct sir !!!

The arm position is variable depending on the awning that is installed. The correct position is as you describe. As the awning is (intentionally) rolled out, the anti-billow arm should just clear the stop. If the awning is rolled out/billowed (unintentional) and the roller arms are correctly locked, the anti-billow arm will contact the stop (whatever the stop may be....) and prevent further unrolling. It will usually be angled a bit toward the coach vs. straight up.

If you are traveling, and the slide isn't ALL THE WAY in (as little as a 1/4" out), the anti-billow device may not work.
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Old 03-23-2014, 06:06 AM   #13
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Yes, the correct position is angled slightly toward the coach but not so close as to cause it to hit the stop while extending the slide.
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Old 03-24-2014, 07:25 PM   #14
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Thanks for all the input . I found one at a local RV shop for $6.52. last one they had .
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