The following is an email from Forte (Tony) regarding spar issues. Let's
talk about this together before sending any direct responses to Forte.
Bram
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To: |
BDally6107@xxxxxxx |
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Subject: |
Re: Barbecue bill |
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From: |
Mtdilemma@xxxxxxx |
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Date: |
Tue, 9 May 2006 08:27:59 EDT |
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Full-name: |
Mtdilemma |
Bram:
How much?
Glad everyone had a good time at the BBQ.
Just to answer your questions on spar management here it is.
First issue:
Some of the earley spars had there tracks attached with 3M 5200 this was
standard protocall here for our first 9 mon in business, and if was in fact the
SS
class that helped us make the switch to Plexus MA 425 (remember Forte as a
spar building company has been developing in parallell with the SS class).
Those tracks did not hold on the we (Forte) procured 2 plexus kits for the SS
class. I know its a hassle to repair the track and we will do it for zip if
the
spar finds its way back here. On the other hand it is the class itself that
should be administerig the shipment of the kit around to the various members
that have decide to attach there own track (each user gets to pay shipping
once).
Which leads us the the next issue.
UV exposure: All SS masts are build using a Ciba/Vantico/Huntsman Aryldite
6010 epoxy resin modified with 2 surfacte tension modifiers and 2 UV
inhibitors.
This whole shebang is cured with Methyltetrahydrothalic ahydride catalized
with a proprietary catalyst. This formula does not cure at room temp ever, if
it did we would be shut down. The resin back bone is still an aromatic
repeating structure and even though we add UV stabelizers this will not allow
for
long term direct exposure. All spars expected to live out side on a foat
should
have an additional coat of a good UV filtering clear applied. The measures
we take here will only hold on if a spar is exposed while sailing and during
rigatta weekends.
Here is what we recommend for a forever finish: If you know your spar is
to live outside the spar should be taken from us with no track installed,
sanded so the outside is flatted out and given 2-3 coats of Interlux Perfection
Clear (we buy the stuff from jamestown dist INTYVA853KITQ). The track area
should be taped off witha stripe of 3/4" blue tape so when the tape is pulled
the
sanded surface is available for the Plexus/track treatment. If you already
own a spar and it is chalking after longterm direct exposure than all it needs
is a scotch-brighting, tape off the track and 3 coats of Perfection.
You may be thinking geez for $750 smackers why doesnt this include the
paint job? If we could we would. Our painter expected to spend 6 hours from
start to finish, if we had to add this on this would represent another $390.
Judging from the amount of clear being aplied to the boat it self I would first
recommned a DIY.
Smell: As all SS builders know boat construction with epoxy is not a
stinky event and the use of a 2K brushable finish is stinky. Not dangerous
(but
dont smoke while applying) as the urethane is not atomized (as when spraying)
but he solvent smell is not something you want in you house. A good day bright
and not too windy can result in a realy fine job.
Bram has some additional experience with the West 207 he will share with
the class. One may consider actually building a composite spar with 207 but
unfortunately the TG is so low the spar would fall down on a sunny day and it
would plug up our resin recirculation system which remains resin/hardener
charged 24-7. If any class members have any questions please do not hesitate
to
call of E-mail me.
Thanks Tony Delima
Forte RTS
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