gibsea 84 keel missing - what now?

[Seajet]

Well without galvanising it would soon be a blob of rust, all steel keel are galvanised, then that's what anodes are for.

Easy to fit an anode on the part of my vertical lift keel at the part which protrudes from the ballast bulb on the end so it doesn't interfere with raising, but there must be quite a simple way of doing it with swing keels too; or that may be the reason the last one fell off !!!

 

[Tranona]

I wouldn't have thought galvanising below the waterline to be a very good idea. Surely Zinc coating would turn the keel into a gert big anode???

Only if it is in contact with something else. Very common to galvanise centre plates and plate bilge keels. With the centre plate it is a good idea to have a Delrin bush in the pivot hole - would guess this one was lost because either the pivot pin or the plate corroded. Care is needed for the uphaul attachment as well.

 

[Pete7]

Andy, you haven't read the thread, it isn't my boat! I was walking down the pontoon and just decided to try and help. I think the magnet was to locate not lift the keel, but you never know.

Pete

Pete,

I might try with one of those sea-searcher magnets but even if you find it lifting through mud might be tricky.

Once you are sure of the pattern try this lot;

http://www.bdmarine.co.uk/

They made a new keel plate for me, including galvanising; just give crystal clear instructions.

Andy

 

[Seajet]

Sorry about the confusion; however I would never imagine a magnet lifting the plate, even Thunderbirds would struggle with that one !

The message about BD Marine stands for the OP dedwards though.

 

[Scareyclott]

I feel your pain dedwards

http://www.ybw.com/forums/showthrea...ll-off-any-advice-welcome&highlight=keel+fell

Ours went for a walk too. I have had a diver down and although the boat hadn't been moved since the keel up haul snapped he found nothing, we have surmised it fell off of ours on the way to the crane.

I am still looking for a pattern The guy that was working on it for me at the marina who said that he new a guy with one that could be lifted is now 'no longer working for us' great all that waiting for a quote and he has gone

I even managed to contact the designer in France a very nice man but apparently the plans were hand drawn and Gibsea themselves designed the keel plates

And to top it all i went to do a boat check last weekend and there is a Seagull nesting on my fore deck with an unhatched egg Aghhhhhhhhhhhhhhh :mad-new:


Scott

 

[oche]

Hi i am from Spain don not understand English you read through the tanslator l have a gib sea 84 DL and also lost daggerboard, but l put the drawings here will try, if l cam not you
cam leave me your email.
greetings

 

[oche]

 

[oche]

voy subiendo poco a poco

 

[Daydream believer]

Personally I would first check the pivot bolt area because it would most likely have been the bolt that failed. It is unlikely that the steel around the bolt corroded first so that the plate dropped off. If the bolt failed then that could mean a leak could develop where the bolt passes through the keel box. A boat in our club had a bolt fail & most of the work was in getting the old bolt out. But if yours is fairly free it could lead to a leak.
Once you have an approximate shape I would suggest making an 18mm ply pattern & trying it for fit. That could then be given to the engineer as a guide for cutting the new plate. It is a lot easier trimming ply than a sheet of steel & there would be no dispute about him cutting it wrong.
A sheet of 18 ply is not that expensive & you might have enough to do 2 experimental shapes depending on the size it should be