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 Post subject: My Daggerboard hook fix
PostPosted: Fri Oct 16, 2015 11:54 am 
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Site Rank - Old Salt

Joined: Thu Sep 17, 2009 12:35 pm
Posts: 317
Location: Lake Champlain, Vermont
The dreaded hook failure. Oh Bastard.

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Crazy how its all filler in that stress area. I guess sometimes things just aren't designed perfectly.

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1. Grinded back the area (both sides)

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2. Applied a full layer of 1708 biax, then multiple layers of chopped mat to each side, one side a session. That clamp just holds a backing piece of plastic to keep the floppy end of layup from flopping down. Poor mans mold if you will. It just needs to be close because you'll clean it up when you lay up other side. I use vinyl ester just cause I have it.

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3. Sanded with board sander and DA and block to get back the shape

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4. Filler is 3m vinylester
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5. Figure out hook and next will shape it. Prob this weekend.

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300% stronger than original (not scientifically tested).

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H18, H17 & Various motor boats


Last edited by divimon2000 on Thu Oct 22, 2015 6:39 am, edited 2 times in total.

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PostPosted: Sat Oct 17, 2015 7:30 am 
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Joined: Sun Jun 02, 2013 5:24 pm
Posts: 23
SWEET! Beautiful work Sir. Post the finished pics.


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PostPosted: Sat Oct 17, 2015 4:52 pm 
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Joined: Wed Nov 06, 2013 2:43 am
Posts: 208
Location: Brisbane, Australia
Fantastic looking work and documentation

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2007 Hobie 16 - 'Slingshot'
1996 Hobie 18 - 'Onrails'
Hobie Bravo - 'Hobie Bites'


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 Post subject: My Daggerboard hook fix
PostPosted: Sun Oct 18, 2015 9:14 am 
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Joined: Thu Sep 17, 2009 12:35 pm
Posts: 317
Location: Lake Champlain, Vermont
Thanks.
I finished it today. I used my tracing on the board and overlaid the other centerboard to verify. Then just grinded away the excess. Careful not to take too much off and test fit firstImage

Used the die grinder with a roloc disc to knock off the point.
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Then some light sanding

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Fits fine and rock solid.

The next time I would use more 1708 to build it up faster- not need as many layers of Mat

So there's a bit more room at the nose than I thought (in centerboard pocket) so I'm glad I had some extra glass there on my fix to take advantage and make it stronger. You can see there is way more material around the hook than factory.

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H18, H17 & Various motor boats


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PostPosted: Fri Feb 05, 2016 2:04 am 
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Joined: Mon Sep 20, 2004 12:36 pm
Posts: 773
Location: Tri-Cities, WA
Looks like a good fix. I also addressed this back in November 2012 with step by step instructions how to rebuild the hooks using 3/4 fiberglass threaded rod as the hook backbone. I had to rebuild both my centerboard hooks and after over 2000 miles of sailing, both are still working well with no new issues.

OK - I posted the pictures of my hook repair.
http://thebeachcats.com/pictures/?g2_itemId=100823
This technique has worked for me on a couple rebuilds. :wink:


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PostPosted: Fri May 13, 2016 4:27 am 
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Joined: Thu Sep 17, 2009 12:35 pm
Posts: 317
Location: Lake Champlain, Vermont
I like the various fixes for the problem. Nice.

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H18, H17 & Various motor boats


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