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d-zine View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote d-zine Quote  Post ReplyReply Direct Link To This Post Posted: 29 July 2007 at 12:26am

Hi NEU,

Thinking about your comment on the shrinkage of the planks, which is why it has taken me so long to reply. You got me worried you silly s'x'd.

If the planks are 150mm wide and the joints are nominally 3-5mm then shrinkage is max 5% or 2.5mm from either side. As I have seen no sign of tearing or elongation of the fixing holes within the planks I am going to assume as it should be that this sort of movement was accomodated for in the original design and detailing of these boats.

 

If I am wrong then she won't be Flywood she will be lots of bits of wood floating in the overall shape of a boat. Time will tell.

RAFWEBFOOT, what was the RAF line as regards operating these boats in a hot climate to manage shrinkage within the timber, were they kept moist or were they allowed to dry and then refered to as 67ft RTTL's?



Edited by Pioneer
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d-zine View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote d-zine Quote  Post ReplyReply Direct Link To This Post Posted: 23 July 2007 at 7:39am
Barnacle,

You can still see the calico when the joints are raked out, it no longer serves as a water impermeable barrier as you can now see through from the inside of the hull i.e pin pricks of light at some points where the planking crosses.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote barnacle Quote  Post ReplyReply Direct Link To This Post Posted: 23 July 2007 at 12:23am
if i remember correctly, the 2 layers of the hull planking had a sandwich of white lead paste and calico fabric between them didnt they?

ahhh The Keppel, thats the beast... thanks for that d-zine


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Post Options Post Options   Thanks (0) Thanks(0)   Quote d-zine Quote  Post ReplyReply Direct Link To This Post Posted: 22 July 2007 at 12:51pm
Hi again,

Another photo from 2 weeks ago taken from the Starboard Bow.






Edited by d-zine
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d-zine View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote d-zine Quote  Post ReplyReply Direct Link To This Post Posted: 22 July 2007 at 12:32pm
Hi Barnacle,

Just to tidy things up and because I like pictures I have attached an Image of HMS KEPPEL who was instrumental in the attempted rescue of 2754 as advised by yourself.





Edited by d-zine
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clive View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote clive Quote  Post ReplyReply Direct Link To This Post Posted: 22 July 2007 at 11:33am
 Good idea.
masbie something in the water.   www.freewebs.com/masb32/
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d-zine View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote d-zine Quote  Post ReplyReply Direct Link To This Post Posted: 22 July 2007 at 11:19am
Hi Clive,

Guess she looks like an inside out swimming pool.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote clive Quote  Post ReplyReply Direct Link To This Post Posted: 22 July 2007 at 11:14am

Hi Darren,

 I recon the answer to your question could be to take them out in rough seas.

p.s. I like the paint, she looks ready for a dip!

masbie something in the water.   www.freewebs.com/masb32/
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Post Options Post Options   Thanks (0) Thanks(0)   Quote northeastuser Quote  Post ReplyReply Direct Link To This Post Posted: 22 July 2007 at 11:10am

So bearing in mind these vessels are riveted along the edge of the planks perhaps you may have been told the answer to a question I’m curious about.

Once they get to a certain age and you get this type of drying out and the planks shrink. Well doesn’t that mean the rivets have been pulled by about half the distance of the gap. E.G if you have a 10mm gap then the rivets along the adjoining planks have been pulled sideways (or broke/twisted) by about 5 mm.

So if you do get the planks to take back up, wont that mean they will be lose now? or at least start to work when at sea. Even if she looks and sounds tight can you trust those rivets?

So what’s the plan? Re-rivet between the original rivets?replace every second plank?



Edited by northeastuser
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d-zine View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote d-zine Quote  Post ReplyReply Direct Link To This Post Posted: 22 July 2007 at 10:56am
Hi,

I think on my next trip I will bring a moisture meter and record the moister level in the timbers and their sizes. Then when the timber has taken up I will record again.

As the boats were built in the UK then the timbers were acclimitatized to our climate so service anywhere warmer would result in shrinkage. What did the RAF do when the boats were in service in the Med,Barhein and Gan to stop or at least control shrinkage?
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