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Old 01-10-2014, 08:44   #436
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Re: Lagoon Cat smashed in Thailand

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My point is, even in a full vacuum bagged epoxy construction, some voids are inevitable. Good luck finding an affordable boat that uses such methods, best you are likely to find is infused. I've seen the same over and over, from many different builders. And even from myself!
Yes, fair enough and thanks for the reply.

I am surprised that there could have been so many voids as to have compromised each of the blocks over a whole (or even near to) hull, if so then it seriously puts the method into question.

With duracore (or any pre-build systems you have experience with) and only buying panels do they hold up to their sales claims ?

Or to put it another way, can manufacturers build panels with factory methods that do avoid voids ?
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Old 01-10-2014, 08:51   #437
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Re: Lagoon Cat smashed in Thailand

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Drink faster...



If it's a cat... Monostrophic if you have a keel...
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Old 01-10-2014, 08:56   #438
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Re: Lagoon Cat smashed in Thailand

It would be no harder to repair than a solid glass boat. Only an outside skin needs to be installed in one tide.

Under the 1000nM scenario both cored and solid would be easier to deal with the hole before making passage.
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Old 01-10-2014, 09:02   #439
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Re: Lagoon Cat smashed in Thailand

Robert Redford can fix these problems offshore just hanging over the side. He even managed not to get any epoxy on his clothes.
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Old 01-10-2014, 09:16   #440
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Re: Lagoon Cat smashed in Thailand

minaret, is it common practice to balsa core below the water line? To me that is the recipe for disaster and seems senseless. OK, I can understand the coring above the waterline for weight and longitudinal stiffness but below? I didn't think it was common practice.
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Old 01-10-2014, 09:20   #441
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Re: Lagoon Cat smashed in Thailand

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minaret, is it common practice to balsa core below the water line? To me that is the recipe for disaster and seems senseless. OK, I can understand the coring above the waterline for weight and longitudinal stiffness but below? I didn't think it was common practice.

Fairly common. Balsa has highest strength/weight ratio of core materials. Commonly used below waterline in boats which are very concerned about weight.
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Old 01-10-2014, 09:24   #442
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Re: Lagoon Cat smashed in Thailand

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It would be no harder to repair than a solid glass boat. Only an outside skin needs to be installed in one tide.

Under the 1000nM scenario both cored and solid would be easier to deal with the hole before making passage.

Good luck with that! As someone who often repairs large holes in boats, it's not gonna happen. No balsa core, no problem. Then you can grind and it doesn't matter when the tide comes in, just wait for it to go back out and keep working. Try it in a balsa cored boat, and you are locked in to a single tide if you don't want the core to get wet(er). Plus you must dry the core to laminate to it. Not gonna happen in one tide, if the repair is of any size.
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Old 01-10-2014, 09:25   #443
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Re: Lagoon Cat smashed in Thailand

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Fairly common. Balsa has highest strength/weight ratio of core materials. Commonly used below waterline in boats which are very concerned about weight.
Thanks! I guess I just don't want to go that fast.
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Old 01-10-2014, 09:26   #444
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Re: Lagoon Cat smashed in Thailand

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Yes, fair enough and thanks for the reply.

I am surprised that there could have been so many voids as to have compromised each of the blocks over a whole (or even near to) hull, if so then it seriously puts the method into question.

With duracore (or any pre-build systems you have experience with) and only buying panels do they hold up to their sales claims ?

Or to put it another way, can manufacturers build panels with factory methods that do avoid voids ?

Not that I've seen.
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Old 01-10-2014, 09:46   #445
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Re: Lagoon Cat smashed in Thailand

Not gonna happen in one tide, if the repair is of any size.[/QUOTE]

So we have gone from a scratch to a small puncture to a hole of substantial size.

Are you aware that you move the goal posts to suit your argument or do you do it subconsciously?

You should read up on the James Cook and the Endeavour holing on the Great Barrier Reef. Luckily for the crew he had a can do attitude.

So anyway, now we have a substantial hole. Glug, glug glug in most heavy catamarans. What is the rule about water pressure and depth? I think 44C draws 450mm. I draw 600mm.

There are arguments to be made each way.
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Old 01-10-2014, 09:49   #446
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Re: Lagoon Cat smashed in Thailand

I do agree that balsa is more challenging. However. Outside skin first.
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Old 01-10-2014, 10:04   #447
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Re: Lagoon Cat smashed in Thailand

I'm getting in on this late so sorry if this has been covered but.... ?how? in the world could that cat have basically disintegrated the way it did? I've seen lots of boats (cats and monos) washed up on shore after major hurricanes that are battered but essentially still intact but I haven't seen a complete and total structural failure like this one. Thanks.
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Old 01-10-2014, 13:59   #448
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Re: Lagoon Cat smashed in Thailand

Since this has turned into a different type of discussion, Minaret, could you tell us whst would or should a balsa cored owner do in the event of a nick or impact that could allow moisture in, what type of in the water quick fix to keep any damage from getting worse until they can get the boat to a haul out?

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Old 01-10-2014, 14:02   #449
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Re: Lagoon Cat smashed in Thailand

Yes, it has been covered and what makes you think that it was only 'washed up on shore'?
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Old 01-10-2014, 14:55   #450
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Re: Lagoon Cat smashed in Thailand

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Why pray tell would a small puncture be catastrophic. Within 6 or 7 days, ?

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It wouldn't. A Duflex boat called "Just Add Water" got a tear in it's hull near the bow from hitting what was suspected to be a shipping container just afloat.

That boat was repaired weeks later without even removing it from the water. The owner told me water had migrated less than a centimetre from the puncture.
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