Let's Talk Centerboard operation.

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Moderator: GreenLake

Re: Let's Talk Centerboard operation.

Postby bilbo » Sat Sep 19, 2020 9:50 pm

I ad some centerboard issues today while out sailing and ran across this thread looking after I got home. The board would move itself up partially when the Downhaul was not cleated. I’m assuming this is due to drag on the board. With the downhaul cleated, the board hit something and got jammed. It wouldn’t move either way. I haven’t been able to survey the damage yet, but the system Tim Webb put together looks like it would help a lot. How are the cleats attached to the trunk? The horn cleat already there looks like it’s just a couple of screws. Is that really enough?
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Re: Let's Talk Centerboard operation.

Postby GreenLake » Sat Sep 19, 2020 10:11 pm

I can add some generic thoughts to the discussion:

  1. Bolts or screws for cleats are loaded on shear (sideways), making them stronger relative to other directions of pull
  2. You don't know it's a screw unless you unscrew and look at it.
  3. Some places on these boats there are embedded metal plates that were drilled and tapped for bolts.

I would unscrew one screw/bolt from the horn cleat and check. That's the best generic answer.
~ green ~ lake ~ ~
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Re: Let's Talk Centerboard operation.

Postby bilbo » Sun Sep 20, 2020 1:17 pm

It’s held on by two #8 screws. They go through the side of the trunk near the top of it, and don’t appear to be backed by anything. There’s a hollow space behind where the clear is mounted but I was unable to find where it is with a light or by fishing wire through the screw holes. The new hardware for Tim’s centerboard rigging is on order; I think if I stay at or above the height of the existing screws on the trunk I should be safe.
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Re: Let's Talk Centerboard operation.

Postby GreenLake » Sun Sep 20, 2020 2:04 pm

Certainly see no reason to suggest to any change from the existing method. If you replace a cleat with one that has auto-release, it'll put a cap on the maximum pull.
~ green ~ lake ~ ~
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Re: Let's Talk Centerboard operation.

Postby bilbo » Tue Jul 06, 2021 11:12 am

I did the auto-release cleat for the centerboard last year and unexpectedly tested it this past weekend. I was heading up to a beach and it got shallow a bit faster than expected. Or the CB whacked a rock, I'm not sure, but the auto-release popped loose and did its thing. I think this is a great modification.
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Re: Let's Talk Centerboard operation.

Postby GreenLake » Wed Jul 07, 2021 1:21 am

Indeed, and the same if your rudder has a downhaul
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