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Old 18 August 2014, 16:59   #11
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Hi Shinyshoe, just been reading about the peanuts that dissolve, but there are types that don't ( I don't know where to find them though ), I thought about a tear and the peanuts floating out all over the place..... perhaps some liquid latex poured in after the peanuts to help bind them together to a degree........... I wonder !
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Old 18 August 2014, 17:15   #12
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No experience of liquid latex.

Crazy idea... Something like a long thin balloon pushed in through valve, inflated and tied. Repeat....
Now ballons normally deflate over time. Would it if the pressure outside it was higher (I.e. the inflated tube?)
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Old 18 August 2014, 17:16   #13
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Quote "The boat is old Gurnard - but I have no idea just how old it is Christopher ??"

They were made around 1972 to 1978.
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Old 18 August 2014, 17:37   #14
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Don't consider innertubes-if the only company that made them (Gemini) is still about, you'll get ripped off. They were a regular occurence on here-people bought them then came here to complain about their boat being knackered.

Realistically, there's no solution that's safe and workable for the 2 chamber issue. If it bothers you that much, give the boat a damn good clean with TFR and sell it to buy something with 3+ chambers.

It's really only going to end up costing you time and money to result in something that you won't be able to sell if you mess around with foam/chips/any type of filler.
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Old 18 August 2014, 18:29   #15
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Hi Nos, just been searching online and found a supplier of 20mm closed cell ( waterproof ) foam balls, the valves are 25mm dia. Would it be unsafe to fill the tubes with a good amount of these?

Other than the resale side of it Nos ( I guess the balls could be taken out again if i had 3 full days to spare ) I'm trying to weigh up the positives and negatives of having a thing that wont sink with my Father in it, the loss of resale value might still be worth it..... I'd gladly buy another second hand sib, but keep thinking....... even a brand new one with 3+ chambers still the risk is there to have a chamber burst ( especially if fishing over shallow grounds which we will be ) and be in the same situation and maybe wished I'd just filled the damn things with foam balls for peace of mind that it 99.9% wont sink ?
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Old 18 August 2014, 19:17   #16
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You'd REALLY have to try to burst a chamber and with 3 chambers a boat will hold it's shape far better.

20mm foam balls are a false economy. Anything like that is. If you really want to make your current one safer, get some new valves and install them where you can pump the boat up while afloat, then carry a Clamseal (google it).

Really, there's so little risk of a 3 chamber sib sinking it's negligible. You're overthinking it.
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Old 19 August 2014, 03:06   #17
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Yip... This is all trying to reduce the consequence score not the likelihood.

Not sure pumping a seam failure will achieve much but good suggestion on extra valves. I wasn't thinking of a Gemini tube but more a home bodge!

20mm balls... No good for a 21mm hole...

Still worried? You need an unsinkable hull either a foam filled GRP like a dory or a rotomould like FunYak...

Or... Operate in company...
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Old 19 August 2014, 03:30   #18
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http://pages.ebay.com/link/?nav=item...542372&alt=web
Bodge?

Valve at front. Insert this through valve. Repeat with existing valve at rear.

Inflated this is 11 inch. So need a big split to come out. Stabbing puncture? Only loose one inner...

But... Not sure how its pressures would compare... Suspect you'd inflate the inner tube then inflate main tube which would crush inner... Would it reinflate once outer deflated?
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Old 19 August 2014, 03:48   #19
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Shiny - stop leading the guy down an expensive dead end. He has two chambers on a 40 year old boat. Trying to bodge that to be safer with any of the ideas suggested is crazy.

The boat is probably fine for close inshore stuff or use with friends around, but sell it and get something appropriate if going a mile offshore.
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Old 19 August 2014, 06:25   #20
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Shiny, about reducing the consequence score - on this current boat I can't think of anything safer than having the 2 tubes filled with some type of foam, just like a buoyancy aid / life jacket.

Other than being unable to fold it back up again, I can't think of any other negative point.

The plus points I see are :

It will make the boat 100% unsinkable
It will help retain the shape and be buoyant enough to support us both and the engine even if both tubes deflate.
It would also remove the urgent need to replace valve locations ( knowing the thing will still float - it then wouldn't be a desperate panic to start pumping a tube back up )

If I were to spend 35 on these 20mm balls and use them as a filler ( the valves are 25mm dia so will fit ) what are the bad points about doing that ?

I'm asking myself - would I rather be in a 3 tube hollow inflatable or a 2 tube filled with foam?

I have a gas life jacket here and wear it often as I believe the chances of the thing bursting are very remote and negligible, but when on the water I still prefer to wear the older foam vests and PFD's.

Is the sib any different ?
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