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  #91  
Old 02-05-2014
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Re: need help and advice -mid cruise keel crack

I am also going to second the opinion that there seems to have been a good amount of filler that got knocked out of a large gap that was probably there from the day the boat was built. The most likely cause for that would be some motion in the ballast. I don't think it moved by an inch so as to create all of that gap, but even a slight, say 1/16 inch, motion would cause the filler to come off. Are the keel bolts accessible? Are they tight? Is there any water or rust stains oozing around them? Any stress cracks in the fiberglass near the nuts? Maybe the glass got crushed a tiny bit, giving the bolts some wiggle room.
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  #92  
Old 02-05-2014
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Re: need help and advice -mid cruise keel crack

Quote:
Originally Posted by chancemiller View Post
BAM currently @ 96%, forgive the shaky camera work, I was diving with a reg and a tank, no BCD, no weights. I borrowed some pink flippers too, which were awesome.

boat hull san pedro - YouTube

it's uploaded but still "processing" as of 2:20pm est
finally have internet to se this

ok

here goes

this is just about as an easy a fix as saying this is catastrophic

if you look at the seam its flush...in other words the two sides both the keel and stub are flush and smooth meaning what has heppend is that over time THE FILLER has been able to fall out

this can be caused by

a shift in the keel
loose keel bolts if any
flexy hull, oil canning etc...
age

or like others have mentioned REPEEATED releasing of the cb fully...slamming against stub

as you can see the "damage" is in the aft area of the keel hull stub joint MEANING that there has been forces involved "MOVING" the keel forward in other words this has been caused by repeated forward shifting

the good news for those with a keen EYE

is there is not lateral or torsional movement of the keel, in otherwords its in the same plane as the stub(cb hole if you will)

so the fix is simply to follow the line of the keel hull joint

what you are seeing is the line grow and grow...

more apparent stb side then port but that doesnt mean the gap or line is not there, simply that the joint is being exposed little by little...

so you haul out...grind away and bevel keel hull joint line(a good diagram of the keel ballast would help by looking at the boats plans)

then you clean, rinse, clean and acetone or alcohol the joint

smack in some 5200 fast cure

torque keel bolts while sitting on keel a bit to add pressure...squeeze out excess, the you have your preference of fairing compunds on top of the 5200

jet bond works by sherwin williams
epoxy and talc
epoxy and microballoons(hard)
polyester an talc
a quick wrap with fine glass mat and glass over

fill up with underwater epoxy

the list is endless

some cheap options or some expensive options

on my boat I went the 5200 fast cure route, since we dealt with tides, quick glass work and faring, priming and the antifouling

my gap was 2 inches big at the forward part of the keel...caused by ORIGINAL FILLER falling off and failing....btw it was a combo of sealant, bondo type filler and gelcoat

FROM THE FACTORY...absolute crap work if you ask me especially on a new boat...big tolerances were accpeted at the time...and sloppy work was normal

but standard back in the day

so that is my advice

this is not catastrophic in any sense

you can call me at (503) 7412-4576 if you need help with translating once you get to rio dulce or wherever

christian
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Last edited by christian.hess; 02-05-2014 at 11:49 AM.
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  #93  
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Re: need help and advice -mid cruise keel crack

a vid or pic of the leading edge of the keel would tell us more if this was caused by a frontal impact of the keel

this can cause the aft end if the keel to detach if you will and sink in the aft stringers or bottom of hull...but I dont think this is your case as you would of shown us this first

good luck
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  #94  
Old 02-05-2014
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Re: need help and advice -mid cruise keel crack

Quote:
Originally Posted by christian.hess View Post
finally have internet to se this

my gap was 2 inches big at the forward part of the keel...caused by ORIGINAL FILLER falling off and failing....btw it was a combo of sealant, bondo type filler and gelcoat
Holy guacamole.

Would be interesting to try to build a reference of keel tolerances for different manufacturers.
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Re: need help and advice -mid cruise keel crack

I think this woul cause boat owner to crap there pants

Im a full keel lovaholic...but Its not that I dont understand or love fin keelers either

simply out unless buying a swan back in the day most production cruisers had these little issues

the point is most guys never know whats going on...its not like 90% percent of owners rebed their keels right?

so you never know
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Old 02-07-2014
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Re: need help and advice -mid cruise keel crack

I feel a sigh of relief! The design of the CB keel should be able to take the forces of a CB hitting bottom, being kicked up, and dropping down with a bit of a bang.
Being an older boat, a lot of filler, let go.
If this theory proves correct, epoxy the CB, do the crack, and she would pass any survey of the keel.
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Old 02-07-2014
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Re: need help and advice -mid cruise keel crack

That would be a very happy outcome.. hopefully that's the case.

But man, that's a lot of 'filler'.... just sayin'....
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Re: need help and advice -mid cruise keel crack

unfortunately for me I still have a leak somewhere...either through the keel bolts or the keel hull joint

bummer only so much you can do 6 hours at a time with tides...

oh well

Im not immune to leaky boats apparently as having owned a wooden classic has taught me before!
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Re: need help and advice -mid cruise keel crack

Quote:
Originally Posted by christian.hess View Post
unfortunately for me I still have a leak somewhere...either through the keel bolts or the keel hull joint

bummer only so much you can do 6 hours at a time with tides...

oh well

Im not immune to leaky boats apparently as having owned a wooden classic has taught me before!
How fast? Are all your through-hulls good? Stuffing box stuffed? Is the leak salt or fresh? Could be a hidden water tank leak, as someone had a while back. Do you have a shore-side connection that could be leaking? It's not raining in through an open port is it?

Do you have powder you could put down around possible sources?
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Re: need help and advice -mid cruise keel crack

Last summer I sailed a Bristol 32 that had a centerboard that was not operative.

I found that close hauled the boat had very bad weather helm.
The explanation was that since the boat was slipping sideways as much as forward the barn door rudder was pushed to cause the weather helm.

So if you can get a chance you might want to fix the centerboard so your boat will sail better.

Unless of course your model behaves differently.
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