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post #1 of 20 Old 06-09-2011 Thread Starter
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a crack!

i found this yesterday and im trying to determine how it happened.. a bump on a piling? brittle spray liner which is what is cracked, hard flexing? i tuned the rig to the specs of Tom Schock over the phone and i took it out yesterday to see if there were any changes while under sail on tack and no matter port or starboard it stayed the same. im really hoping its just cosmetic and i can fix it with some glass but my real concern is does it look structural and not sound to sail ? or something i can do asap without causing serious damage?

a crack!-crack31.jpg

a crack!-crack21.jpg
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post #2 of 20 Old 06-09-2011
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what make boat? what year? Looks like hull flex

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post #3 of 20 Old 06-09-2011 Thread Starter
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a 93 Santana 2023 and thank you for the response
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post #4 of 20 Old 06-09-2011
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both port and starboard? Does the width of the crack change depending on which tack you are on?
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post #5 of 20 Old 06-09-2011
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While that doesn't look like a structural problem that would keep you from sailing, the tension in the shroud is the big suspect. You say you recently tuned the rigging. Was it slack before? If that cracked tabbing was put in place while the rig was slack and hence didn't put any strain on it, that may explain the issue. In any case, I am not familiar with the spray material you used there but I think you should glass it if you need flexibility compatible with your hull and deck.

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post #6 of 20 Old 06-09-2011 Thread Starter
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the spray was from the factory. which ever tack i am on it stays the same as i was thinking that on a port tack it might open up a bit if it was due to the rigging. in years past it was too loose and this year i got some info from Schock then tightened her up.
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post #7 of 20 Old 06-09-2011
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If you didn't hit something or sailed in a storm when this happened, it is most likely due to the new rigging tension. If you are confident about your rigging tune job, that I think you should glass get rid of this spray tabbing and use fiberglass and do that for every other place this was used. Factory choices are not always the best ones. Just my opinion as I said I am not familiar with this material. Brittle structural members have no place on a boat.

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post #8 of 20 Old 06-09-2011
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I guess the question is, is that "bulkheadette" really structural?

Can't tell from the pictures but it looks rather small, like the edge of a bookshelf as opposed to a large bulkhead separating compartments.

It sure looks like it let go because of tension from the chainplate above it, but that could also just be fatigue from xx many cycles of tacking, as the tension was applied and released and a marginal bond from the initial layup finally let go.

If there's just a bookshelf there...no big deal. If it is structural, you've probably got to take it apart, slack off the rigging, fab it back up. Kinda looks like it was finished with that "popcorn" used on home ceilings at that time.
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post #9 of 20 Old 06-09-2011
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What is the backing plate behind the crack ? I see nuts,I think???


If it is not getting any larger on either tack then I would most likely just relax the rigging and do some glass work and then tighten it back up.I assume it is a 20' foot boat and it should not take much time to clean that out and rework the tab.Then you will be on your way sailing once again.Just be neat and tape everything off and put plastic everywhere as to catch the mess.
As said before the spray reminds me of the ceiling texture used in houses.

Last edited by BEENONLANDTOOLONG; 06-09-2011 at 01:58 PM.
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post #10 of 20 Old 06-09-2011 Thread Starter
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its a 23 so not a big job. there is just a shelf there that stores random items, nothing heavy. i tried slacking off on the rigging and it didnt close itself up at all but i definately want to glass and do it right. ill take it out tonight when the wind dies down a bit and recheck it to see if there is any change when close hauled. thanks
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