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daggerboard trunk

daggerboard trunk

Greetings,
I am new to the Class this year, just picked up an F5. Loving it. This is a great forum, just starting to poke around. Was hoping you guys to could help me with a question.  I have had the boat out three times now, in light winds and gusts up to the mid 20’s. Each time I come back with a bit of hull water. Maybe a pint or two. (I find beer glass measurements references to be easiest for me to contemplate). Not too bad an issue but I would like to address it if possible.
Have not yet filled the mast step, or the cockpit to see if they leak but I am pretty sure they don’t. Issue looks to be the daggerboard trunk. It is a bit chewed up around the outside and inside the bottom, shows lots of wear and some cracks. The bottom of the trunk drips a lot when the boat is out of the water, and even when it has been out for a while, like a week or two, in hot dry weather, it still seems a bit wet. So I am thinking that is the place to start.
How would you guys propose patching it? If it is dry and cleaned with acetone, would a simple epoxy repair kit work ok to sure it up, or will this just fail? Is there a better long term solution? Sorry I don’t have any good pics to share.
Seems like a common problem. Thanks for any suggestions. Cheers guys.

Chris S
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Re: daggerboard trunk

Assuming you're comfortable working with the materials required:

I'd get some fiberglass cloth in there is possible.  You can rough up the area real well with low grit sandpaper (50 grit) all around the bottom of the inside of the trunk.  As high as your fingers will reach.  You could probably do 2 layers of 6 oz cloth or 1 layer of 10 oz.  Use epoxy for this since it has better bonding quality.  Try to get all the way around the bottom.  Once cured, be sure to sand the layup and then coat it so there aren't any rough nubs that could scratch your daggerboard. 
You should get some material up and down the ends of the trunk, too.  You can use a small thin (but stiff) stick with sandpaper wrapped around it to rough up the front and back ends.  Something like a yard stick.  Once it is roughed up, you can thicken up some epoxy with milled fibers and cabosil to a thick but pour-able consistency.  The pour the mix carefully down the trunk on the ends to create a little fillet.  It might take two pours to get enough stuff down in there.  Do the front end with the boat upright and the back end with the boat upside down. 
Once all of that is done, you'll want to do the carpet pieces trick in the ends of the trunk.  More on that later if you want.
Good luck.    smile     And check the mast cup anyway.  Just fill it with water and see if it drains out by itself.

dkinzer
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Re: daggerboard trunk

Thanks for the info dkinzer, I will digest it. The trunk will likely be a project for the end of the season. I have heard of the carpet trick but not sure of the implementation. I would appreciate instructions for that as well if and when you have the time to share.. I will also search the forum. Will also check the mast cap soon!

Chris S
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