J120 Jameerah sustains keel damage at Fastnet

Teener

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Those guys are heroes.  Can I get that kind of service from the Coast Guard?


Key facts about the RNLI


The RNLI charity saves lives at sea. Its volunteers provide a 24-hour search and rescue service around the United Kingdom and Republic of Ireland coasts. The RNLI operates 238 lifeboat stations in the UK and Ireland and more than 240 lifeguard units on beaches around the UK and Channel Islands. The RNLI is independent of Coastguard and government and depends on voluntary donations and legacies to maintain its rescue service. Since the RNLI was founded in 1824, its lifeboat crews and lifeguards have saved over 142,700 lives.

 

Wet Spreaders

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They made it back to port but you wonder how. Many of the J120s with a hull number less than 25 have had that happen to them. The first 24 boats were built with the floor grid being added after the hull had cured and it would break free in a heavy sea state. After hull 24 the grid was laid up at the same time as the hull and the were infused at the same time.

Anyone know what hull #  Jameerah is?  

I know Rudy Hasl's J120 Hassle Free had that happen to it. It was hull # 17 or 18. J Boats knew they were a problem but was keeping the matter a secret from the owners.

The photo was given to me being represented to be Jameerah.

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The article says that they hit something. Don't you think you might be jumping the gun talking about build quality, hull numbers, "keeping secrets" and so-on?

 

Hard On The Wind

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The article says that they hit something. Don't you think you might be jumping the gun talking about build quality, hull numbers, "keeping secrets" and so-on?
The owner Simon Ruffles said that they did not hit something. The damage was from flying off of a couple of big waves.
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Crash

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Bump.  So what did they find, what do they think caused the damage, and what is the status of repairs?

 
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George Dewey

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Every time my boat falls off a wave crest and slams into the trough, I cringe! Of course we try to avoid that, but shit happens...

 
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Hard On The Wind

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Bump.  So what did they find, what do they think caused the damage, and what is the status of repairs?
J120s prior to hull #24 were laid-up improperly. If you don't get the keel sump reworked on those first boats then this will happen in due course. The floor grid pops free from the hull and then the hull has to support the weight of the keel all by itself. 

 
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longy

Overlord of Anarchy
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? My recollections of that issue (I was commissioning J boats) is that there were no athwartships stringers around the keel sump, & the keel loads were flexing the flat areas around the keel. 120's had stringers laminated in to add rigidity (3?). These added stringers did not extend down into the sump more than a couple of inches, so did not add much strength to the area that cracked on Jameerah

 

Hard On The Wind

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? My recollections of that issue (I was commissioning J boats) is that there were no athwartships stringers around the keel sump, & the keel loads were flexing the flat areas around the keel. 120's had stringers laminated in to add rigidity (3?). These added stringers did not extend down into the sump more than a couple of inches, so did not add much strength to the area that cracked on Jameerah
On the first 24 boats the athwartship stringers were tabbed in after the hull had cured leaving a mechanical bond only. When stressed they would pop free from the hull. On subsequent builds those stringers were scrimped in during the initial infusion thus they were bonded to the hull chemically.   Problems solved.

 

mckenzie.keith

Aspiring Anarchist
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J120s prior to hull #24 were laid-up improperly. If you don't get the keel sump reworked on those first boats then this will happen in due course. The floor grid pops free from the hull and then the hull has to support the weight of the keel all by itself. 
Just out of curiosity, is it confirmed that Jameerah's is one of the affected hull numbers, and that it was never reworked appropriately?

 

Squalamax

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On the first 24 boats the athwartship stringers were tabbed in after the hull had cured leaving a mechanical bond only. When stressed they would pop free from the hull. On subsequent builds those stringers were scrimped in during the initial infusion thus they were bonded to the hull chemically.   Problems solved.
All the pre scrimp J Boats had their floor timbers secondary bonded/tabbed in after the hull was layed up. There must have been some other issue with the 120's that caused the initial failures. Not an adequate amount of floors maybe?  

 

Hard On The Wind

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All the pre scrimp J Boats had their floor timbers secondary bonded/tabbed in after the hull was layed up. There must have been some other issue with the 120's that caused the initial failures. Not an adequate amount of floors maybe?  
None of the J120's were prescrimp. But the pre hull #24 had the floor grid pop loose and as far as I know none of the post hull 24s have had a problem. Maybe can't make a mechanical bond to scripmed hulls? 

 

Squalamax

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None of the J120's were prescrimp. But the pre hull #24 had the floor grid pop loose and as far as I know none of the post hull 24s have had a problem. Maybe can't make a mechanical bond to scripmed hulls? 
Everything else in a scrimp J120 is secondary bonded in(bulkheads, ect)

I would wager, it was either prep or design flaw for the initial 24 hulls. 

 
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