I'm not sure you could break that board with that amount of
immersion.
Before I re-read the posting I was going to suggest using a 1/2"
foam core faired to a bidirectional Speer section, since the act of
getting the laminate even 1/4" away from the center would make the
board several times stronger, and the section shape might reduce
drag over the bare board. But perhaps that's not necessary.
- Mike
Very small project, my question was still very vague I know . Breaking point I can't remember the terms off hand but I think sheering load before the sheet brakes in half. Lets say a small steerable weather board 14''L sheering force at half its length 7'' With the board width 6 1/2 ''.
--- In harryproa@yahoogroups.com.au, Mike Crawford <mcrawf@...> wrote:
>
>
> Very strong! Sorry -- I couldn't say how much stronger. Just: wow --
> that's a serious piece of FRP.
>
> If you're going to layer it by hand with epoxy, you might want the
> outer surfaces to be glass or a glass-carbon hybrid so that you can be
> sure they are entirely wet out. If you're not infusing, the wetting-out
> of carbon and kevlar can be very difficult to determine. You'll also
> be able to sand/fair it a bit more easily in that you can eat into the
> glass slightly and still get a nice finish.
>
> - Mike
>
> tsstproa wrote:
> >
> >
> > For got hand layed with epoxy sorry....
> >
> > --- In harryproa@yahoogroups.com.au
> > <mailto:harryproa%40yahoogroups.com.au>, "tsstproa" <tsstproa@> wrote:
> > >
> > > 2 pieces of 20 oz cloth or four 10 oz cloth sheets laminated together?
> > >
> > > How strong would a sandwhich of 20oz standard glass cloth- 8oz
> > carbon - 10oz SGC- 8oz carbon- 8oz SGC and the last piece 8 oz
> > carbon.THEN REPEATED STARTING FROM THE 20 OZ SIDE
> > >
> > > SO THE SANDWHICH WOULD LOOK LIKE THIS
> > >
> > > 8C,8G,8C,10G,8C,20G,20G,8C,10G,8C,8G,8C
> > >
> >
>