In a message dated 3/3/2007 10:28:41 A.M. Pacific Standard Time,
csokafamily@xxxxxxxxxx writes:
Dear Classmembers,
I will pick up my stripes next weekend and plan to start the bulkheads
immediately, but before I can do that, I have to order the composite and the
epoxy
set. After converting the US measures to ISO, I came up with few questions,
what I hope you can answer.
Zoltan,
It's good to hear that you're on your way.
1. The 9 gallons of epoxy converted to 34 liters, the required 205 hardener
to 1.6 liter, the 206 to 1.6 liters and the 207 to 1.3 liters. Calculating
the mixing measures (1:5 for the 205 and 206; 1:3 for the 207) the hardener is
enough only for 20 liters of Epoxy. What about the rest?
Zoltan,
You are correct that you'll be short on hardener, however, it is difficult
to tell which you'll use the most of (205 or 206). That will likely depend
on whether you build mostly in the summer or the winter. I'd wait until you
have your small parts built and start to run low on hardener before buying
much more. Be sure to have enough 206 on hand, however, before you start to
lay up the hull or deck.
2. How strong (oz/square yard or gram/square meter) the carbon tape should
be? (I have 3 choices, 125 g/m2, 200 g/m2, 350 g/m2)
We've been using 8 oz per yard which must be close to the 350 g/m2
3. The lightest available carbon-kevlar twill is 210 g/m2, but the 5.5 oz
converts to 186 g/m2, is the difference too big, or from the weight point of
view it does not matter a lot?
I think that will be a 6.2 oz. per sq yrd. That may be getting a little
heavy since it takes more epoxy to fill the weave. It would work if you have
access and experience with vacuum bagging.
Thank you for your help in advance,
If you have any trouble locating anything, we are just completing a package
with a new supplier who claims to have access to everything we need. This is
a supplier I've used before for S-glass and peel ply and I will be
publishing more information by mid week on my website. I will also send that
info out
to this mailing list.
Best regards,
Bram
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