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Buoyancy tank foam,
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Ruscoe View Drop Down
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Posts: 1514 		Post Options Post Options   Quote Ruscoe Quote  Post ReplyReply Direct Link To This Post Topic: Buoyancy tank foam,
    Posted: 02 Apr 11 at 10:06pm
Hi,
I am in the process of restoring/modifying a 70's Super Graduate, to sail with the little one.  The Buoyancy tanks were filled with a foam which over the years has taken on some water.  As per the class rules the foam need to be attached to the boa, although the years have meant this has now detached.  I have removed all the old foam, but now need to replace it with something more modern that will not absorb water.

Can anyone make some recommendations as to the best foam to use, and where to get it?

Many thanks,

Russ


Edited by Ruscoe - 02 Apr 11 at 10:09pm

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winging it View Drop Down
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Posts: 3958 		Post Options Post Options   Quote winging it Quote  Post ReplyReply Direct Link To This Post Posted: 03 Apr 11 at 10:23am
people use all sorts of stuff - polystyrene cut off, old buoyancy bags, sealed up milk containers.  My choice would be the polystyrene balls used to go in bean bags tied or taped up in very sturdy plastic bags.  That way you can push them into all sorts of nooks and crannies.  If you try to get 'the real thing' you will pay a lot more for the same effect.

For even more esoteric and expert answers you really need to cross into cvrda territory...

http://www.cvrda.org/community/

this is very much our sort of question!

cheers,

Nessa

ps webmuppet recently undertook just such a project for his littl'un, with great success!
the same, but different...

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winging it View Drop Down
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Posts: 3958 		Post Options Post Options   Quote winging it Quote  Post ReplyReply Direct Link To This Post Posted: 03 Apr 11 at 10:24am
ps, if you still have those jibs I have a ToY now too which I reckon is crying out for a jib  Wink
the same, but different...

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Ruscoe View Drop Down
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Posts: 1514 		Post Options Post Options   Quote Ruscoe Quote  Post ReplyReply Direct Link To This Post Posted: 03 Apr 11 at 10:45am
Nessa i am really sorry i had completely forgotten to pack them up and post them to you.  I still have them and they are yours, i just got to remember to pack them up and send them.  This weekend has been the first i have had time to breath for a while so if you send me a PM/E-mail tonight i will pack them up and get the wife to take them to the post office this week.

As for foam, the Graduate rules say it needs to be permanently attached to the boat, so polystyrene balls are out i think.  As are air bags (which was my choice, until i read the rules)

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Contender 541 View Drop Down
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Posts: 1402 		Post Options Post Options   Quote Contender 541 Quote  Post ReplyReply Direct Link To This Post Posted: 03 Apr 11 at 3:26pm
Russ, this sounds like an obvious question but, have you asked the Graduate class what they do?
When you find a big kettle of crazy it's probably best not to stir it - Pointy Haired Boss

Crew on 505 8780

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JohnW View Drop Down
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Posts: 552 		Post Options Post Options   Quote JohnW Quote  Post ReplyReply Direct Link To This Post Posted: 03 Apr 11 at 3:27pm
How about swim noodles? You should be able to strap them down to the hull inside the tanks.
I dont know how many you would need and if they would be cost effective.
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Ruscoe View Drop Down
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Posts: 1514 		Post Options Post Options   Quote Ruscoe Quote  Post ReplyReply Direct Link To This Post Posted: 03 Apr 11 at 5:58pm
Originally posted by Contender 541

Russ, this sounds like an obvious question but, have you asked the Graduate class what they do?

Its not a common thing as i understand it.  The graduate forum is really inactive as well.  

i like the swimming noodle idea, anyone know what they are made of?  if i caould buy that foam in larger blocks it would be great.

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Contender 541 View Drop Down
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Posts: 1402 		Post Options Post Options   Quote Contender 541 Quote  Post ReplyReply Direct Link To This Post Posted: 03 Apr 11 at 6:07pm
Russ
 
I think they are made of expanded PP.
If they are then it is a common material in packaging.
 
I rather suspect you have some contacts in that are you can tap up, but if not let me know and I can give you a few names.
 
 
BTW - You going to Burton nex week?
When you find a big kettle of crazy it's probably best not to stir it - Pointy Haired Boss

Crew on 505 8780

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Posts: 534 		Post Options Post Options   Quote Webmuppet Quote  Post ReplyReply Direct Link To This Post Posted: 03 Apr 11 at 6:17pm
Russ

I peered into the tanks of our Supergrad and there's nothing in there. Perhaps I'm being dim, but why do you have to have foam etc. in the void - surely it's just a case of making sure that the tanks are watertight ? 

Cheers,

Nigel
I am the milkman of human kindness, I will leave an extra pint (Billy Bragg)

Graduate 2530 'Galaxy'
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Ruscoe View Drop Down
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Posts: 1514 		Post Options Post Options   Quote Ruscoe Quote  Post ReplyReply Direct Link To This Post Posted: 03 Apr 11 at 6:59pm
Stuart, Yeah we will be at Burton next weekend, had a really good sail today.  Tim Rush is dropping off our new kite and hopefully new carbon poles and Twin Spinno... Big smile

Nigel, The rules state that GRP boats have to have foam secured in the tank, the supergrads only have one tank and no bulkheads so i guess its in case you are holed.  i have removed all of the foam from ours as it was full of water and no longer attached.  Taking all of the foam out, the rear traveller moulding and a few other bits has saved me about 6kg in weight at present!!!  So of this will go back on when i rebuild the deck/hull, fill her with closed cell foam (just in case) and then paint her.  Wish i had weighed her at before i started.


Edited by Ruscoe - 03 Apr 11 at 7:03pm

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