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Old 21 April 2006, 21:57   #21
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There don't seem to be any wear patches at all on mine - like the black ones pictured earlier in the thread - I guess it is just crap design/build

I don't have enough at the moment to do a big job but it definitely needs to be on the "to do" list

What are the black bits on other RIBs is that hypalon or something else? mine only has that right next to where it joins to the GRP

When I did the "experiment" I roughed it up with some coarse sandpaper, took the sheen off the surface. Probably just the wrong sort of glue, so I hope one of the folks tomorrow has some Bostik or I am going to be VOR (or should that be BOW?) for a long time waiting for some...
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Old 21 April 2006, 22:34   #22
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I reckon a half meter square or 3/4 meter square of hypalon to cut your two triangular wear patches from must cost around 50 (probably cheaper if you can get on the right side of one of the tube manufacturers / rib repairs here on ribnet). 1/2 litre of 2402 must be around 15 - 20 and the 5 day airmail for that is in the region of 30.

So worst case scenario if you cant source the materials locally for less than 100 you can get someone here on ribnet to send it all over and you can be back on the water in less than a week
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Old 22 April 2006, 04:00   #23
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would that area be in line with wash from the prop at all?
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Old 22 April 2006, 06:50   #24
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It's the bit that takes the hammering. Cos Humbers are low to the water, every wave and every turn impacts that bit. My Destroyer had the patches and I extended them in the way I posted earlier. Twoz the solution. You're correct, inner tube adhesive doesn't work.

There may be a bit of a design flaw in the method used for joining the cones. Previously, Humber used an outside seam tape just as they did for each panel join but this gave a forward facing edge and was prone to lifting. The present system keeps the edges rearward but it leaves a small section of single layer hypalon at the cone join. I suspect that is the slight crease you mentioned earlier. You can sea it also on my picture and it's the reason I suggest the black patch should extend back to protect the cone seam. Having double layers each side of a single layer at the point of most flexure is going to ensure the single layer does pretty much all of the flexing. Dopey design.

The tail end if the tube is also the likely contact place for any debris you may encounter and a bit of extra protection in this area is not a bad thing.
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Old 22 April 2006, 07:40   #25
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JW,

I wondered if that was the case, whether there was a small area where there is a single thickness of hypalon between the seams, it would explain everything and definitely means it needs reinforcing. Definitely a dumb design, for the sake of an extra inch or two of hypalon they could have overlapped the seams and made it several times stronger.

Roy, unfortunately adhesive can't come by air as it is flammable, the airlines won't carry it even if anybody will send it (which Humber won't as I'd already been on to them about ordering repair bits before this happened - they will only post inside UK).

I guess I am finding out why Humbers are cheaper than anything else. You gets what you pays for like with most things...
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Old 22 April 2006, 08:11   #26
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Quote:
Originally Posted by BogMonster
JW,

I guess I am finding out why Humbers are cheaper than anything else. You gets what you pays for like with most things...
Jeff, you're not gonna let him get away with sayin that are ye?

Fragile these inflatable boats, aren't they!
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Old 22 April 2006, 08:41   #27
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Quote:
Originally Posted by BogMonster
JW,

I wondered if that was the case, whether there was a small area where there is a single thickness of hypalon between the seams, it would explain everything and definitely means it needs reinforcing. Definitely a dumb design, for the sake of an extra inch or two of hypalon they could have overlapped the seams and made it several times stronger.

Roy, unfortunately adhesive can't come by air as it is flammable, the airlines won't carry it even if anybody will send it (which Humber won't as I'd already been on to them about ordering repair bits before this happened - they will only post inside UK).

I guess I am finding out why Humbers are cheaper than anything else. You gets what you pays for like with most things...

Have a go at Humber - explain it is damaging their reputation and that it is a design fault and I am sure they will send you the material free of charge - especially if you make some veiled threats about them having to come over to fix it!!!

Under British law if the fault was there from new then it has to be corrected - even 20 years on!!!
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Old 22 April 2006, 09:22   #28
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Quote:
Originally Posted by Jonny Fuller
Jeff, you're not gonna let him get away with sayin that are ye?
I'm sayin' nuthin'.

Quote:
Fragile these inflatable boats, aren't they!
Well, one of them is.


Edit: What might be significant is; I inflate my boat tubes until the safety valves blow off. It makes them pretty firm. Now I've said that, I bet they fekkrs are going to explode the next time I'm out.
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Old 22 April 2006, 10:00   #29
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Well I have got some 2 part Hypalon glue, it ain't the Bostik it is this stuff:

polymarine adhesive

it says it is for Hypalon repairs so hopefully will be OK.

Don't know how well it is going to go because it is a pig of a place to work on and due to the shape of the tube and the stiffness of the rubbing strip I can't collapse the tube enough to put pressure on the patch ... but I have sanded the &&&& out of it (nice and orange now) first layer of goo is on both bits, it says leave that for 30 min then do another layer then leave for 5 min and slap the patch on with as much pressure as possible.

Just cut a small section for now, to fit between the two seams and cover the bit that is leaking, it will be easier to work on reinforcing the other weak bits once I can get some air into the thing and have something to press against - at the moment it is like trying to work with a jelly and there is a big wrinkle in the hypalon only a few inches away from the hole which will be impossible to glue anything to at the moment.

Still at least the sun is shining

Fingers crossed.... cure time is 48 hours so I guess I shouldn't put any air into it till Monday.

I am definitely going to whinge at Humber next week.
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Old 22 April 2006, 11:37   #30
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links for repirs

www.allinflatables.com and click repairs & try hypalon.I had never done a repair until last year and i just scoured the internet and got as much info as possible and tried.The repair (whilst a little daunting to begin with) was perfect when finished and was holding air when i traded in last year.
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