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fudheid View Drop Down
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Joined: 21 Apr 11
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Posts: 241 		Post Options Post Options   Quote fudheid Quote  Post ReplyReply Direct Link To This Post Topic: carbon masts
    Posted: 05 Jan 12 at 12:14pm

Originally posted by JimC

It looks as if someone has tried to do a repair on the cheap and it hasn't come off. If that was a full price job I think the repairer needs to be looking at themselves if they billed for it. If on the other hand it was "well, we'll have a go on the cheap, no guarantees, its at your own risk whether it works or not, mate", then well, these things happen.
According to the MD of the carbon specialists (oh yeah they are specialists, i know i should name and shame but i won't) it took 35 manhours to Feck this up. When they saw the job full of confidence 'no problems, we are experts at this will be good as new' Dead
 Repair time at  for mast (excluding the hull repairs): 35 hours. Chargeable rate at  for carbon on carbon circa £50 to £75 per hour. Total repair cost including materials, £2,200. We've agreed to call it quits, and I will honour that - maybe that will make you a little more patient - can you wait til the weekend? Angry A quote from the MD, needless to say after the work we did to 'call it quits' enabled him to sail at the I14 worlds LOL deep down i'm laughing at the loss of my time and energyover something that potentially i should of paid someone else to do Clap
I'm having trouble working out what I'm looking at... Is that one break or two? But certainly repairing that involves taking large chunks out and replacing them. It could very easily not be cost effective to get it done professionally because it means fabricating new sections that are exactly the right size. Also I fear it might be better if the whole track came off and was replaced. 
 It is 2 breaks, at both sets of spreaders, the lower break is kinked but not to the same extenet as the higher break. The track seems to be a nightmare for repairers as it is costly and comes in min lengths?

If its a single break at the hounds then a whole new top mast might be the best bet. C-Tech, maybe amongst others make at least some of their carbon spars with a separate tapered topmast and parallel main section and a joint at the hounds.

As far as pre-bend is concerned most classes ban masts being built with intentional pre-bend. 
Thanks you have confirmed my worst fears, carbon tubes should be straight when not loaded LOL
looks like it was wise to keep the insurance money afterall and not holiday in the carribean with my good lady Wink




Edited by fudheid - 05 Jan 12 at 3:38pm
Cheers you

only me from over the sea......
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olly_love View Drop Down
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Posts: 1145 		Post Options Post Options   Quote olly_love Quote  Post ReplyReply Direct Link To This Post Posted: 05 Jan 12 at 12:09pm
the issue you will have it the leach will be massivly open is the tip points aft,
and yes jim there is a join in the mast,
TWO FRANK-Hunter Impala


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timnoyce View Drop Down
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Posts: 1991 		Post Options Post Options   Quote timnoyce Quote  Post ReplyReply Direct Link To This Post Posted: 05 Jan 12 at 12:07pm

mmm, that repair is best described as terrible. If you paid for more than the materials then you have right to complain as it is shocking!

Looks like a CST mast which is generally quite a large strand, but can be cleaned up and laminated quite nicely (I repaired a Cherub CST mast a couple of years ago). I'd not bother trying to straighten this one, just accept that it is a bad job and sail it as it is. As long as you can get the main up and it holds it up then it will be fine for training with at least, and to be honest you hardly sound like you are hoping to win the nationals so your skill will probably slow you down more than this mast. Save your pennys whilst you are practising with this one and then get a new mast when you can afford it.
BEARFOOT DESIGN
Cherub 2648 - Comfortably Numb
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JimC View Drop Down
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Posts: 6662 		Post Options Post Options   Quote JimC Quote  Post ReplyReply Direct Link To This Post Posted: 05 Jan 12 at 11:54am
It looks as if someone has tried to do a repair on the cheap and it hasn't come off. If that was a full price job I think the repairer needs to be looking at themselves if they billed for it. If on the other hand it was "well, we'll have a go on the cheap, no guarantees, its at your own risk whether it works or not, mate", then well, these things happen.


I'm having trouble working out what I'm looking at... Is that one break or two? But certainly repairing that involves taking large chunks out and replacing them. It could very easily not be cost effective to get it done professionally because it means fabricating new sections that are exactly the right size. Also I fear it might be better if the whole track came off and was replaced.

If its a single break at the hounds then a whole new top mast might be the best bet. C-Tech, maybe amongst others make at least some of their carbon spars with a separate tapered topmast and parallel main section and a joint at the hounds.

As far as pre-bend is concerned most classes ban masts being built with intentional pre-bend.


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olly_love View Drop Down
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Posts: 1145 		Post Options Post Options   Quote olly_love Quote  Post ReplyReply Direct Link To This Post Posted: 05 Jan 12 at 11:06am
that looks crap,
mine broke above this point and we have done a much better job,
i think its dead tbh, also what has someone done around the main sheave?
and the caps take off points as there should be inserts for standard t terminals here
the sideways bend may be ok but the for and aft istnt good,
i would attach it with a finger belt sander and see if you can thin it down a bit
looking at it you wont hoist the main as the head will get caught,

we have an alloy you could borrow to get you sailing? if that would help,
i would give giff a call or jamie from synthasise as they may be able to graft a new top section on but it all depends on what needs doing, and how much you want to spend,
TWO FRANK-Hunter Impala


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fudheid View Drop Down
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Posts: 241 		Post Options Post Options   Quote fudheid Quote  Post ReplyReply Direct Link To This Post Posted: 05 Jan 12 at 10:38am
Originally posted by fudheid

So the mast snapped in 2 places, it has been sleeved and bonded??
I figured it would be straight as a die? Do carbon masts have natural prebend? Can this be sorted? ifso who? 
otherwise i have a very bespoke mast which will need its mainsail cutting to fit exactly.
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fudheid View Drop Down
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Posts: 241 		Post Options Post Options   Quote fudheid Quote  Post ReplyReply Direct Link To This Post Posted: 05 Jan 12 at 10:35am
Cheers you

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JimC View Drop Down
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Posts: 6662 		Post Options Post Options   Quote JimC Quote  Post ReplyReply Direct Link To This Post Posted: 04 Jan 12 at 9:36pm
Its very difficult to say anything very useful about this without seeing the mast, how it was damaged, how it was repaired and what the problem with the repair is.
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fudheid View Drop Down
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Posts: 241 		Post Options Post Options   Quote fudheid Quote  Post ReplyReply Direct Link To This Post Posted: 04 Jan 12 at 8:57pm
Originally posted by olly_love

who fixed it? and which b14 pm me if you dont want to name and shame, just ring your insurer (asuming it an insurance job) and get them to replace the whole mast, as the repair should have restored it to the original condidition,


it was a gift from salvage so no insurance hence the ask about repairs. The question is can a carbon mast be straightened from a dodgy repair and if it can any recommendations?
Cheers you

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andyxs View Drop Down
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Posts: 12 		Post Options Post Options   Quote andyxs Quote  Post ReplyReply Direct Link To This Post Posted: 04 Jan 12 at 7:55pm
if they do total it let me know! im after a length of carbon.
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