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Old 15 October 2009, 12:01   #1
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Removeable Jockeys - How???

Can anyone help me out re the above?

I am collecting two double jockey seats tomorrow (fibreglass 1000m long with internal flange for fixing). I need to be able to bolt them in and out interchangeable with a dive rack.....

I have looked at the 'big head' fixing mentioned here previosuly and can get a long strip made up with female threaded sleeves.....I would then need to remove the floor covering drill out holes for the sleeves and bond the perforated strips to the deck (with some ss self tappers for good measure) and then reapply floorcovering over the top.

Problem is that with seats removed would still have raised bolt heads (albeit domed) on deck as well as the concern that the water tightness of the inner hull is compromised.....

Has anyone else got any suggestions /a method they use in their boats?

As always - your feedback is greatly appreciated.

Dan
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Old 15 October 2009, 12:54   #2
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Is the inner hull supposed to be watertight? Genuine question. I assumed not, thus the need for a drain plug.
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Old 15 October 2009, 13:20   #3
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Hi Observer - Perhaps watertight is the wrong way of describing it. After all, my anchor locker has a drain into the inner hull and as you quite rightly say, I then need to empty the inner hull using the drain plug....

I guess my concern is that I would be putting circa 20 holes (5 each side of the length of the jockey flange) in the deck and would only have bolts (M8 or similar) to stop any sitting water from deck entering the inner hull.....possibly not worth worrying about given the ability to drain....


Dan
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Old 15 October 2009, 13:22   #4
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If i remember correctly Chris did it with his old osprey have a search or im sure he will be along soon to help

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Old 15 October 2009, 14:13   #5
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Thanks James.....found the thread.

Chris' solution is really similar to the big head system I've looked at...if interested, see linky below then click on the big strip section.

They will make up a 1000 long strip with 5 female sleeves welded on for around 15 each (4 required). I would then use a mixture of ss self tapers and a high grab waterproof adhesive....

http://www.bighead.co.uk/products/specialFasteners.html

If there are any other solutions would like to hear them!

D.
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Old 15 October 2009, 17:02   #6
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Quote:
Originally Posted by Dan Worth View Post
Problem is that with seats removed would still have raised bolt heads (albeit domed) on deck as well as the concern that the water tightness of the inner hull is compromised.....
Why would you have raised, domed bolt heads on the deck? The top of the 'bighead' sleeves should be flush with the deck surface and are 'blind', so any water on the deck will not run through to the inner hull. You could seal any gaps around the bigheads with sikaflex or a GRP filler.
I've got a similar set-up on my boat. I use A4 stainless allen head grubscrews to keep sand and crap out of the bighead threads when the seats aren't fitted.
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Old 16 October 2009, 02:28   #7
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Oh they're Blind!

Hi Brad.....

I had assumed the female sleeves were 'straight through' Hadn't realised they were blind....even better!

Good idea re using the screws to keep threads clean - i was working on the basis that i'd put the bolts I removed back in when seats were out.

Just out of interest, you say you have a similar system, what is it? Is it cheaper than the Big Head?

Thanks,

Dan
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Old 16 October 2009, 07:31   #8
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Hi Dan,
when I bought the boat, I wanted removable aft pods ('cos I don't have any mates ).
4 no M10 female bigheads were installed in the deck for each seat pod, at approx. 150mm PCD. The flowcoat applied to the deck seals the bigheads and prevents any water penetrating into the hull void. The manufacturer supplies seat pods with a fully glassed base, which I then drilled through to accept M10 fixing bolts and penny washers. Bolt length is critical, due to the 'blind' nature of the bigheads.
The system you're proposing sounds good.
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Old 16 October 2009, 15:13   #9
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Seats now collected......they're just what i was looking for.

They came from John Win (Thanks John)...and thanks to Chris and JSP for flagging them up / passing on contact details etc.

I had intended getting them recovered, but they are okay for now (couple of small nicks etc) and are Red with black piping will match my tubes....in fact, think I'll try and match the vinyl and get my main jockey covered to match!

The bases have been stripped and are now at a mates body shop to get them etch primed and sprayed....hopefully ready for when I get back from Lifeboat college next weekend.

When i get them back I'll measure up and get the big strips made up....

Brad - if I understood your message right, you used 4 studs per jockey? - Were they singles and if so, do you think 6 would be sufficient for each double jockey?.....I was planning on 10 originally...(dims are 1000l x 380w)

Thanks for your help with this guys, will post pics when all done...

Dan.
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Old 16 October 2009, 15:18   #10
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They sound spot on for you Dan. Be good to see some pictures when you've done them
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