Any thoughts on how to proceed on repairs?
I'm sure that there are plenty of repair threads, but Seabreeze isn't the most search friendly site.
I've read Yuppy's thread on his nose repair, so at least I'll avoid that mistake!

Hey Mort, have you tried Board lady repairs. Really helpful.

Thanks Pepe, I was actually just having a look from a link posted on Yuppy's thread.
boardlady.com/repairbasics.htm
Good to know some techniques, the trick will be finding materials here in Tas. I'll give Tamar Marine a call during the week.

I don't like the look of that, the way the crack goes all the way around the rail, the trouble with carbon, is that it doesn't dent like fibre glass, so what looks like a little crack may go very deep into the board. If you apply opposing forces either side of the crack can you get any movement? (don't try too hard don't want to make it any worse)

If there is movement there, you'll probably have to fix the underside of the sandwich as well.

Hi Mort 67

Tamar marine have most (all?) of the stuff you will need (epoxy, matting, carbon tape etc). BUT, if you only need a little bit see me (or one of the other locals) who can probably sell or give you just what you need.

Tamar marine doesn't have divinycell, but can be bought from a place in Hobart.

Clarence

Here's a pictorial history of a similar repair I did about 2 years ago. It's holding up strong. Once you've opened it up leave it for a few days to let the water evaporate. 3 layers of 4 oz. 2 in one layup and 1 in another then gel coat.

PS don't old laundry equipment come in great use for board repairs

Treat epoxy like dogs hit - avoid skin contact - wear disposable gloves - use an effective face mask (not a paper one) when sanding back.

See for example: www.nilsmalmgren.com/epoxy-chemistry/safety-when-working-with-epoxy-and-hardener/

Stanly - not big on that one, a lot of heavy filler!
Bit like Yuppy's recent one.
Whilst, yes, they worked, people need to be aware epoxy gets warm as it cures. You lot may have got away with it due to cool weather and/or a slow hardener but you can melt the board core and even set fire to stuff (not fun) if it is summer and using a normal hardener with such big masses of filler.
(You can't just use less hardener like you can with polyester resin (surfboard repair stuff) - you need super slow hardener)

For the one above (Stanly) I'd have cut more vee out and replaced with a wedge of divinycell or even surfboard core foam and then glassed over. Way lighter and less chance of chemical fires.

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Mark _australia said...
For the one above (Stanly) I'd have cut more vee out and replaced with a wedge of divinycell or even surfboard core foam and then glassed over. Way lighter and less chance of chemical fires.

Good to know for next time.

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decrepit said..
I don't like the look of that, the way the crack goes all the way around the rail, the trouble with carbon, is that it doesn't dent like fibre glass, so what looks like a little crack may go very deep into the board. If you apply opposing forces either side of the crack can you get any movement? (don't try too hard don't want to make it any worse)

If there is movement there, you'll probably have to fix the underside of the sandwich as well.

It might look worse than actual in the photos. There's no obvious movement when I put a bit of twisting load on the crack. Took it out for a sail this arv and no movement. I've looked a bit more closely since and there is some minor damage on the deck side where the impact occurred which is what you can see with the cracking extending over the nose in the photos. Unfortunately a small crack further round the rail from a smaller impact ( i must work on my downwind mast hand control)

I've been given the name of a guy who is a bit of a whizz apparently with carbon repairs locally (not sure of sailboard experience). I'm inclined to look at someone with some expertise if I can find someone (I'll put a post on the Windsurfing Tas threads for advice/recommendations).

Any suggestions on where Divinycell can be sourced from if it goes to the extent of Stanly and Mark_Australia's suggestions?

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clarence said..
Tamar marine doesn't have divinycell, but can be bought from a place in Hobart.

Clarence

Clarence, any details on where? I think I'll look for some professional help to do the actual work.
Thanks for the feedback from everybody. Seabreeze is well handy for advice from those who know a lot more than me.

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Mark _australia said..
Stanly - not big on that one, a lot of heavy filler!
Bit like Yuppy's recent one.
Whilst, yes, they worked, people need to be aware epoxy gets warm as it cures. You lot may have got away with it due to cool weather and/or a slow hardener but you can melt the board core and even set fire to stuff (not fun) if it is summer and using a normal hardener with such big masses of filler.
(You can't just use less hardener like you can with polyester resin (surfboard repair stuff) - you need super slow hardener)

For the one above (Stanly) I'd have cut more vee out and replaced with a wedge of divinycell or even surfboard core foam and then glassed over. Way lighter and less chance of chemical fires.

Ditto.
There is not that much strength in epoxy alone. It is the combination of cloth that gives strength. Epoxy used as filler can also be a tad heavy. Work out how many layers of cloth you need, and fill the hole below with the correct foam.