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Old 04 March 2006, 22:03   #1
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Question about tube pressure loss over 24 hours

I'm wondering if my tubes lose pressure too quickly. If I pump up one section to 2 psi within the next 24 hours it will lose 3/4 - 1/2 a psi on my gauge. The adjoining tubes were deflated so maybe there is a small air leak to the next compartment which under normal circumstances wouldn't be a problem I suppose. But assuming otherwise is a drop from 2 to 1 1/4 psi within 24 hours a sign of a major air leak? The tubes do not completely deflate but probably taper off to less than 1 psi if left sitting for a long time (2 weeks). Or is this unavoidable for tubes of such age? I'm talking about my 1991 Avon Searider of course . Is it porosity or just too many small leaks through seams and such?
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Old 05 March 2006, 07:00   #2
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Make a tin of soapy bubble and slap it over the tubes to see what you can find.
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Old 05 March 2006, 09:00   #3
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Sounds like a leak; I have a 92 rib (hypalon tubes) and it holds air fine.
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Old 05 March 2006, 09:42   #4
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When one chamber is deflated next to the one under pressure there always will be air going into the empty compartment.
Why do you do it this way?
I had many RIBS so far and there were always small leaks between compartments. When all compartments are under pressure you hardly notice.
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Old 05 March 2006, 11:22   #5
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Quote:
Originally Posted by Tim M
I have a 92 rib (hypalon tubes) and it holds air fine.

That's a necessity with an Eagle. Unless it's been retubed, they only have a single air chamber per side.

One small puncture and you're in the cack.

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Old 05 March 2006, 12:50   #6
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Oh ok. I wanted to test each chamber seperately but wasn't sure if they were supposed to be completely sealed from each other or not. I know one of them isn't but wasn't sure of the others.
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Old 05 March 2006, 15:38   #7
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Quote:
Originally Posted by davidmanning
That's a necessity with an Eagle. Unless it's been retubed, they only have a single air chamber per side.

One small puncture and you're in the cack.

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On the older models, not the newer.
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Old 05 March 2006, 16:10   #8
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Quote:
Originally Posted by Petrov
On the older models, not the newer.
You're quite right, Janis, but here's a little clue why I writ what I writ.


Quote:
Originally Posted by Tim M
I have a 92 rib
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Old 05 March 2006, 17:09   #9
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Understod that David, it was just for all others that maybe dont kow that they have chambers today
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Old 06 March 2006, 03:53   #10
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Given the Osprey hard nose and tube support at the rear, do they need more than one compartment each side ? if the worst happens and you blow out the tube it just hangs down doesn't it but still creates an effective barrier to letting water on board.

Got any pictures of her Tim ?

Pete
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