G'day,

There are a few variables, but basically, 400 gsm uni glass is about $15 per
kg, 300 gsm carbon uni is about $150/kgand carbon tow is $30/kg, epoxy is
about $13 per kg. Depends how much you buy and where, but these are ball
park for bulk in Aus. The carbon will be 6 times stiffer than the glass,
and near enough 150% as strong.

Regards,

Rob
----- Original Message -----
From: "Robert" <cateran1949@...>
To: <harryproa@...>
Sent: Wednesday, January 14, 2004 12:23 PM
Subject: [harryproa] Re: Beams to windward hull


> -What is the price differential of carbon against glass, especially
> by the time you add the extra resin needed for the glass?
> Robert
>
> -- In harryproa@..., "Tony Richardson"
> <atrichardson@b...> wrote:
> > As it is such a small boat I would suggest putting on what you
> think will do and have a go.
> > Ply box section beams are strong, light and easy to build.
> > If you were a bit clever with glass you could overlay glass uni's
> onto PVC drainpipe. Wrap the unis in mat and there is your beam.
> Leave the PVC inside.
> > No Rot problems
> > How much glass and where etc? Experiment/Guess
> > Rgs
> > Tony
> > ----- Original Message -----
> > From: Todd
> > To: harryproa@...
> > Sent: Wednesday, January 14, 2004 4:29 AM
> > Subject: [harryproa] Beams to windward hull
> >
> >
> > How strong how light and of what material should the beams be
> going
> > to the weather hull on a 16' equal L an 8 ' beam ? I know I know
> its
> > only 16' but thats all the room I have and can afford. I was
> thinking
> > of maybe a 16 or 18'' center walkway between the hulls and two
> > laminated 2x3s about two to three feet back from each bow
> connecting
> > the two hulls at each end. What do you think? To heavy, over
> kill, or
> > not strong enough?
> >
> > Todd
> >
> >
> >
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