Problems below the waterline

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A few more problems below the waterline

Postby Chris Wicks » Mon Jun 10, 2019 12:20 pm

Just back from a visit to the boatyard.

I decided the centre plate should be removed as she was up on the hoist to inspect inside the centre plate casing and replace the cable if necessary. I'm glad we did. There is some significant damage around the slot including a cracked section to one side of the slot opening. I have regularly noticed that lose pieces of gelcoat come away as I gently poke around with a scraper during annual antifouling prep where the boat is on the trailer.

I've had the boat from new so can account for any mishaps that could affect the boat. Many years ago whilst picking up crew by a beach a sudden ferry boat wake (Greek style tsunami) caught me by surprise and the boat made on big thump onto the ground. It was big enough for me to make an immediate underwater inspection and I could see no ill effect from the incident. It is the only possible cause of the crack that we have now discovered. The boatyard is questioning the quality of factory work inside the c/p slot. The loose gelcoat suggests it was not cleaned or prepared properly. I make no definite conclusions against Honnor Marine as my ground incident probably caused some undetected damage. I mention this very openly because it is an area that warrants closer inspection if others have concerns about osmosis or build quality below the waterline.

The centre plate casing is now being cleaned as far as possible, fibreglass repairs to be completed and epoxy treatment applied when the rest of the hull is done in about a week or so.

We plan to copper coat inside the casing as high as possible towards the waterline and also the centre plate itself. The boatyard thinks there is clearance for this to be OK. They are not sure (yet) how to replace the cable as there is a crimped fitting in the hole where it attaches to the centre plate and it looks difficult to access. The boat builder is suggesting Dyneema and we are yet to make a decision on this.

The guys working on Kaliope are wooden boat builders but their fibreglass work seems to be of a high standard. great guys Kostas and Lefteris and the boss Nikos at Reppos Traditional Boatyard. Any comments on any of the above received with interest.

I have included photos in the FB album, click here to take a look. ... 8786169581


Chris Wicks
CC19 Association Member
Posts: 272
Joined: Thu Apr 02, 2009 6:39 am
Location: Platanias, Pelion, Greece and Funtington, Chichester, West Sussex.

Re: Problems below the waterline

Postby erbster » Mon Jun 10, 2019 5:44 pm

The evidence vindicates your decision to remove the CP. You seem to have found the cause of your osmosis; I’ve looked at every CC I’ve come across and not noticed the osmosis symptoms you have reported.

I had always assumed the cable was like a bike cable and the “thin” end was threaded through the centre plate, so the crimped end was held captive, the free end being then led up through the casing to the drum.

Dyneema has very high tensile strength, but is there a risk of it being weakened by abrasion? (Cable can be replaced without removing centre plate, I believe).

Saw the pics on FB and I think you have certainly made a timely decision to have this work carried out.

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Charles Erb
CC86 Aurora
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