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Old 03 September 2008, 08:24   #41
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If you look carefully at the video, it's pretty obvious that the front of the tube folded back and tore the cross piece at the bow over the rather sharp corner of the flange. After that the glue simply came apart.
Agreed. It looks like sheer force of water to me, rather than an impact with something solid.

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Old 04 September 2008, 11:10   #42
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This is an avon, damage look familiar?
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Big waves, small boat ;)
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Old 04 September 2008, 12:36   #43
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No, different problem.
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Old 04 September 2008, 14:03   #44
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This is an avon, damage look familiar?
That's from scraping off the black paint
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Old 04 September 2008, 16:14   #45
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This is an avon, damage look familiar?
Remember the commercial spec Avons are very different beasts!!!
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Old 05 September 2008, 03:32   #46
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Had a chance to look at Nos's recently, and that looked like it could be sunk and raised again with no damage occurring.
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Old 05 September 2008, 06:04   #47
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Had a chance to look at Nos's recently, and that looked like it could be sunk and raised again with no damage occurring.
Errrmm... It has been Ask Neil Harvey.
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Old 05 September 2008, 12:20   #48
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Hi All

We we’re also perturbed by the incident and of course wanted to find out the cause, we were very disappointed with the one sided media coverage, especially from Somerset Radio who, like a few of these posts have jumped to conclusions without knowing the full facts. Thanks to everyone else for balancing out the discussion.

Can I assure you and any Ribcraft owner, there’s not a design problem with our tube flange or in the way we attach the tubes. The majority of our hulls were designed by the same Navel Architect who designed the commercial hulls for the oldest brand of UK Rib when he retired, there’s no difference in the way we attach the tubes, the size and design of the tube flange to that of the original design. We manufacturer over 150 Ribs per year in the UK, do you not think that if we ever thought there were a design or manufacturing issue, we would be the first to address it?

The Statements which are completely false
1) “This was a glue or bonding failure” Incorrect, our initial findings are that the fabric has delaminated due to the extreme force exerted on the tubes.
2) “The boat is new, only just three years old” Incorrect, the boat is five years old and has had a very hard life, it’s a shame the BBC couldn’t have looked at its own website http://news.bbc.co.uk/1/hi/england/bristol/2983482.stm

The causes for this failure are unique to this boat and we are working through the issues with Portsihead Lifeboat Trust. The extreme stresses on the tubes we think are exaggerated by the conditions and also by the boat being quite heavy due to her size limitations because of the boathouse, to add to this it has been repowered with twin 115’s Opti’s that are heavier and more powerful than the original Mariner 75 two strokes that we originally recommended and supplied from new.

As a gesture of goodwill, Ribcraft are going to fully repair the tubes at no cost to the Portishead trust, despite the boat being a five year old commercial boat.

I’m not going to reply to any further posts regarding this, I know the way things snowball on a forum, If you have any questions, please direct them to me jason@ribcraft.co.uk

Regards

Jason Purvey
Ribcraft Ltd
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Old 05 September 2008, 13:41   #49
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This looks to me like a large wave has hit the bow of the boat either through stuffing or whatever else, as a result the tube has done it's best to seperate from the hull, i have seen and repaired a lot of ribs which have damage to the flange nose patch, it's easy to damage through loading on to the trailer or on a pontoon etc. It's a very important part of keeping the tube on the boat, if it is damaged this is what can happen.
I don't believe that this is a glue failure, once the bow patch and protection has gone the tube will try to seperate through the easiest means possible which will be along the join, fabric will delaminate ususally if pulled from the side and slowly.
On removing a tube for retubing you first apply heat to the bow patch and then find you can easily pull backwards on the understrips along the glue line.
I have very rarely come across the removal of a tube which has reulted in the fabric delaminating when pulling back the understrips.
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Old 05 September 2008, 17:27   #50
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Quote:
Originally Posted by jace View Post
Hi All

We we’re also perturbed by the incident and of course wanted to find out the cause, we were very disappointed with the one sided media coverage, especially from Somerset Radio who, like a few of these posts have jumped to conclusions without knowing the full facts. Thanks to everyone else for balancing out the discussion.
Can I assure you and any Ribcraft owner, there’s not a design problem with our tube flange or in the way we attach the tubes. The majority of our hulls were designed by the same Navel Architect who designed the commercial hulls for the oldest brand of UK Rib when he retired, there’s no difference in the way we attach the tubes, the size and design of the tube flange to that of the original design. We manufacturer over 150 Ribs per year in the UK, do you not think that if we ever thought there were a design or manufacturing issue, we would be the first to address it?
The Statements which are completely false
1) “This was a glue or bonding failure” Incorrect, our initial findings are that the fabric has delaminated due to the extreme force exerted on the tubes.
2) “The boat is new, only just three years old” Incorrect, the boat is five years old and has had a very hard life, it’s a shame the BBC couldn’t have looked at its own website http://news.bbc.co.uk/1/hi/england/bristol/2983482.stm
The causes for this failure are unique to this boat and we are working through the issues with Portsihead Lifeboat Trust. The extreme stresses on the tubes we think are exaggerated by the conditions and also by the boat being quite heavy due to her size limitations because of the boathouse, to add to this it has been repowered with twin 115’s Opti’s that are heavier and more powerful than the original Mariner 75 two strokes that we originally recommended and supplied from new.
As a gesture of goodwill, Ribcraft are going to fully repair the tubes at no cost to the Portishead trust, despite the boat being a five year old commercial boat.
I’m not going to reply to any further posts regarding this, I know the way things snowball on a forum, If you have any questions, please direct them to me jason@ribcraft.co.uk

Regards

Jason Purvey
Ribcraft Ltd
Thanks for your post Jason .. I wish other manufacturers would come on here more often and be frank with us as the end users, as, in the end, we all want the same thing, to be on the water with decent gear
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