Question about tube pressure loss over 24 hours

boatster_sr4 · 05 March 2006, 03:03

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?

jwalker · 05 March 2006, 12:00

Make a tin of soapy bubble and slap it over the tubes to see what you can find.

Tim M · 05 March 2006, 14:00

Sounds like a leak; I have a 92 rib (hypalon tubes) and it holds air fine.

MarkM · 05 March 2006, 14:42

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.

DM · 05 March 2006, 16:22

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.

DM

boatster_sr4 · 05 March 2006, 17:50

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.

Petrov · 05 March 2006, 20:38

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.

DM

On the older models, not the newer.

DM · 05 March 2006, 21:10

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

DM

Petrov · 05 March 2006, 22:09

Understod that David, it was just for all others that maybe dont kow that they have chambers today

Pete7 · 06 March 2006, 08:53

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

Tim M · 06 March 2006, 10:00

Still lots to do:

Pete7 · 06 March 2006, 10:11

Looks quite smart, think she is an early one, say 90/91 time. If you want to change the colour I have the nose cone moulding at home.

Pete

DM · 06 March 2006, 11:48

Quote:

Originally Posted by Pete7

think she is an early one, say 90/91 time.

Good guess, Pete, you're very close, but before you recoil in amazement at my ability to date a boat just by looking at a picture of it, here's a little clue..........

Quote:

Originally Posted by Tim M

I have a 92 rib

DM

Pete7 · 06 March 2006, 12:13

Quote:

Originally Posted by davidmanning

Good guess, DM

Thanks

now then, what year did Mike change the console from an angled sides to cutting the corner off so a port side mounted control box would sit flat against the console ? Also they changed the tubes from about 92 to horrizontal seems rather than lobster type with seems going around the tube, hence the guess at 90/91.

Pete

DM · 06 March 2006, 12:32

Quote:

Originally Posted by Pete7

what year did Mike change the console from an angled sides to cutting the corner off so a port side mounted control box would sit flat against the console ?

Is this a quiz? Normally. I'd like to know what the prize is before I enter.

Anyway, it's a trick question. Mike says he never changed nuffink. Before his time he says.

DM

Pete7 · 06 March 2006, 18:38

Quote:

Originally Posted by davidmanning

Is this a quiz? Normally. I'd like to know what the prize is before I enter.DM

Yep the winner gets to spend a day in Drivers rebuilding wheel bearings

Pete

Tim M · 06 March 2006, 21:05

Quote:

Originally Posted by Pete7

Looks quite smart, think she is an early one, say 90/91 time. If you want to change the colour I have the nose cone moulding at home.

Pete

Thanks for the offer, but i'm sticking with the orange. Deck needs painting, as does the console (or replacing)

Rogue Wave · 07 March 2006, 00:52

Quote:

Originally Posted by Pete7

Yep the winner gets to spend a day in Drivers rebuilding wheel bearings

Pete

and damaging mudguards

DM · 07 March 2006, 16:36

Quote:

Originally Posted by Tim M

Still lots to do:

A cheap way of getting extra seating is to cut the top rail of the bottle rack.

Size a piece of marine ply to fit snugly into the frame and take it to an upholsterers to be covered. Seats are a lot cheaper if you take your own precut ply.

This Eagle was a 92 as well. Mercury 75hp gave it 35knots.

DM

Tim M · 07 March 2006, 16:39

Thanks DM very interesting.

Do you think I could fit two single jockey's in the back (with the rack removed)?