Carbon Fibre Sheets
Printed From: Yachts and Yachting Online
Category: General
Forum Name: Repair & maintenance
Forum Discription: Questions & tips on the subject
URL: http://www.yachtsandyachting.com/forum/forum_posts.asp?TID=1531
Printed Date: 12 Aug 25 at 3:24pm
Software Version: Web Wiz Forums 9.665y - http://www.webwizforums.com
Topic: Carbon Fibre Sheets
Posted By: Garry
Subject: Carbon Fibre Sheets
Date Posted: 11 Mar 06 at 4:33pm
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Where can I get a relatively small amount of woven carbon Fibre sheet say 0.5 - 1sqm? and any ideas how much that much is likely to cost.
Thanks ------------- Garry Lark 2252, Contender 298 www.cuckoos.eclipse.co.uk |
Replies:
Posted By: Strawberry
Date Posted: 11 Mar 06 at 4:35pm
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What's it for? Do you know what weight and orientation you want? http://cgi.ebay.co.uk/CARBON-FIBRE-FABRIC-PLAIN-WEAVE-CLOTH- 170gsm-1-0sm_W0QQitemZ6041042260QQcategoryZ34063QQrdZ1QQcmdZ ViewItem ------------- Cherub 2649 "Dangerous Strawberry |
Posted By: Strawberry
Date Posted: 11 Mar 06 at 4:53pm
I'm pleased that link worked...  Try this: http://www.cfsnet.co.uk/acatalog/index.html ------------- Cherub 2649 "Dangerous Strawberry |
Posted By: Garry
Date Posted: 11 Mar 06 at 5:03pm
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First link worked - just have to delete the view item from the end.
I intend to try and make a mainsheet tower for my contender, since I think I should be up to it... Any winter Cherub builders have off cuts at least 100mm x 600mm, I need enough to lay up a thickness of about 7mm, although might go for 10 as I'm not too worried about weight. Thanks ------------- Garry Lark 2252, Contender 298 www.cuckoos.eclipse.co.uk |
Posted By: Isis
Date Posted: 11 Mar 06 at 5:22pm
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7mm wall thickness!!! are you planning on repeatedly beating said mainsheet tower with a mallet? You may well be better of modding something like a bit of mast instead. From memory the contender towers go over the centerboard case with a slot in the middle? how much of a gap do you need? ------------- |
Posted By: Garry
Date Posted: 11 Mar 06 at 5:44pm
Strawberry - couldn't send these via private messenger. Isis I am going to have to slightly modify the design so want to ensure plenty of strength. ------------- Garry Lark 2252, Contender 298 www.cuckoos.eclipse.co.uk |
Posted By: Strawberry
Date Posted: 11 Mar 06 at 5:59pm
I see. I think Isis and I are going to try and make something like this: ------------- Cherub 2649 "Dangerous Strawberry |
Posted By: Isis
Date Posted: 11 Mar 06 at 6:37pm
Do or Do not... There is no try  Slightly different concept really as our swivels are supposed to be low profile and unobtrusive (as well as having the rope comming from a totaly different angle).. this needs to be tall enough to clear the centreboard when up and is balicaly just a bracket. Cant help thinking you'd be better of doing something like this though if its your first time working with carbon.. saves the effort of building a mould. Bit of carbon mast/rack/pole with a slot cut through and a wooden/nylon/whatever plug in the end to mount your swivel.  No comments on sh*tty quality of artwork... im bored, but not THAT bored ------------- |
Posted By: Garry
Date Posted: 11 Mar 06 at 7:49pm
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Only problem I see with this is fixing it adequately to the deck and find a broken section of mast or boom to play with. ------------- Garry Lark 2252, Contender 298 www.cuckoos.eclipse.co.uk |
Posted By: Isis
Date Posted: 11 Mar 06 at 7:58pm
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Bog it in, fillet the join and a layer of uni-d with some lightweight glass/carbon cloth on top should do the trick... Where abouts are you based? Looking around the back of your dinghy park and asking around the members (particularly 800 sailors) could be a plan. ------------- |
Posted By: timnoyce
Date Posted: 11 Mar 06 at 9:06pm
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or... you could make the general structure from wood or foam and then lay up the carbon around it. That will be easier as you would be able to construct the general component shape otherwise you will need to make a mould to lay up around to gain the shape. That structure on the 14 is almost definitely pre preg and its hard to tell how the contender mount is made as it looks like its been painted. To make 7mm wall thickness from just carbon would take some SERIOUS layers and it would be highly over engineered i feel... ------------- http://www.facebook.com/bearfootdesign - BEARFOOT DESIGN Cherub 2648 - Comfortably Numb |
Posted By: JimC
Date Posted: 12 Mar 06 at 9:37pm
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A mould really wouldn't be a hassle for this structure. As normal pacel tape is your friend (the brown parcel tape is mylar, and epozy just doesn't stick to it). Use some 3 by 1 or something like it strip wood, and make a construction like this. The underneath is the inside dimensions of your turret. The eupper piece is a bit larger all round, and will form the outside surface.
Glue a plate of ply to each side of the inner mould. Leave the outer one loose. 
Start with a layer of peel ply, then laminate up your turret. I'd use two layers of cloth 45/45 (it with the fibres running diagonlly) then about 6 layers of unidirectional carbon, then another two layers of cloth. Then another layer of peel ply maybe two or three as you're new to this and will probably use too much resin. Now clamp your outer mould on top and leave to cure. When cured pll apart the mould and remove the peel ply. Now to strengthen it some more it would be good to give it some ends. Make two flat plates of cloth, 4 layers, two diagonally, two vertically big emough to cover the ends. Compress between two bits of flat wood, with layers of peel ply between the parcel tape on the wood and the laminate. When finished glue these onto the ends, use generous fillets on the inside and then run a couple of strips of 45/45 carbon down the joins. Finally cut a slot in the ends to clear your centreboard. |
Posted By: Olly4088
Date Posted: 13 Mar 06 at 9:50am
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If you cant find any just make it out of metal and take a trip down to halfords and buy some boy racer styleeeeeee carbon sticker. ------------- Phantom 1298 |
Posted By: Garry
Date Posted: 14 Mar 06 at 12:07pm
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Jim That was just the sort of process I'd planned, although thanks for the tip on laying up diagonally. What is peel ply? I had thought of using plastic sheet (damp proof course or similar) over the mould to prevent it bonding to the mould. Garry ------------- Garry Lark 2252, Contender 298 www.cuckoos.eclipse.co.uk |
Posted By: JimC
Date Posted: 14 Mar 06 at 1:16pm
| Peel ply is a sort off open weave nylon cloth, which doesn't stick to the laminate. It soaks up the excess resin and when everything is cured you peel it off, and are left with a even, if patterned finish, which is also suitable for gluing more epoxy on top of without further preparation. |
Posted By: Isis
Date Posted: 14 Mar 06 at 1:17pm
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Peel ply is near enough to the stuff they line suits/dresses with... layed over the laminate and then ripped off when cured will give you a much better finish and help with squeezing excess resin out giving you a lighter end product. ------------- |
Posted By: Garry
Date Posted: 22 Apr 06 at 1:18pm
Thanks to everyone for their help and advice. Nearly finished project is below.
 ------------- Garry Lark 2252, Contender 298 www.cuckoos.eclipse.co.uk |
Posted By: Isis
Date Posted: 22 Apr 06 at 1:30pm
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Looks good! How did you decide to do it in the end? ------------- |
Posted By: Garry
Date Posted: 22 Apr 06 at 2:05pm
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Strong carboard box used to make up template. Plastic sheet taped over it so resin wouldn't stick.
2 layers 170 gsm carbon laid up at 45 degrees. Two layers of some CSM I had lyinging about and then 4 layers of carbon laid up with the weave running up/down. Used plastic sheet and block to squeeze out excess resin. Allowed to go off and then hacksaw used to cut off rough edges. Just need to grind chamfer on edges, drill holes and fit. ------------- Garry Lark 2252, Contender 298 www.cuckoos.eclipse.co.uk |
Posted By: timnoyce
Date Posted: 22 Apr 06 at 2:12pm
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looks good. tres bon
------------- http://www.facebook.com/bearfootdesign - BEARFOOT DESIGN Cherub 2648 - Comfortably Numb |
Posted By: Strawberry
Date Posted: 22 Apr 06 at 2:48pm
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Good work. Now time for avacado and a bottle of wine! Maybe book some theatre tickets too. ------------- Cherub 2649 "Dangerous Strawberry |
Posted By: Garry
Date Posted: 22 Apr 06 at 4:40pm
I had to drink the wine so I could use the box  ------------- Garry Lark 2252, Contender 298 www.cuckoos.eclipse.co.uk |
Posted By: Strawberry
Date Posted: 22 Apr 06 at 4:50pm
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It's a hard life! ------------- Cherub 2649 "Dangerous Strawberry |
Posted By: Boatboy
Date Posted: 09 May 06 at 1:28am
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silly question did you use epoxy or polyester resin for the choppy as epoxy resin wont breakdown the binder and you may have built in a weak point in the structure bb |