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Reinforcing wooden centreboard


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#1 cep32

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Posted 21 November 2018 - 11:40 AM

I've been given an old wooden centreboard to go with my Javelin and given that I'm 110kg when dry, I'm keen to make sure it is strong enough not to break when I stand on the end of it when righting the boat.

 

As a result I've been looking at ways to reinforce it. It is made of laminated pine by the look of it. Is it worth using carbon fibre UD tape or could I get away with using fibreglass?

 

Cheers,

Chris


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#2 waikiore

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Posted 21 November 2018 - 12:54 PM

50mm Carbon tow  as sold by Adhesive technologies is the most cost effective way to achieve what you desire.


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#3 MartinRF

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Posted 22 November 2018 - 06:16 AM

How thick is this board?

How far out will you stand?

 

/Martin


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#4 philstar

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Posted 22 November 2018 - 08:45 AM

carbon tape both sides. I'm 100kg and can stand on my javelin cb. 


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#5 chariot

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Posted 22 November 2018 - 03:52 PM

How much does body weight come into play?. The boat and rig still weigh the same regardless of crew weight. 


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#6 cep32

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Posted 23 November 2018 - 01:03 PM

Sorry for the delay in getting back.

 

The board is about 15mm thick and I would be standing about 1.2m out from the hull.

 

For those of you that have carbon tape on the centreboard, does it cover the whole width or just a strip down the widest point on the board?

 

Cheers,

Chris


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#7 khayyam

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Posted 23 November 2018 - 01:29 PM

How much does body weight come into play?. The boat and rig still weigh the same regardless of crew weight. 

 

^^ this what i was thinking. the rig in the water can be kinda sticky though


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#8 SloopJohnB

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Posted 23 November 2018 - 02:15 PM

I have made a couple for sunbursts from wood with strips of uni carbon (400 gm) about 50 mm wide, router out a channel each side down the middle a run 2 lengths of carbon 50% of board length from the top, 2 more 75% and 2 more full lengt then glass over the lot at 45 degree basis cloth. the channel can be stepped to suit the thickness of the carbon strips.

 

I think it was 400 gm, it was I picked up. ;-)


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#9 cep32

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Posted 26 November 2018 - 07:52 AM

Thanks for that. Looks like I have a plan.


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#10 SloopJohnB

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Posted 26 November 2018 - 03:46 PM

I got to make a sunburst centerboard out of foam, there will be some extra full width layers of carbon where it exits the centercase to stop the foam from crushing.


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"With age comes wisdom .... and with wisdom comes the knowing when to avoid perfection!"





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