Hi Nick,
May be you can define for me what really is prepreg. To my
knowledge it is TOW containing a resin that has to be heated to 100 degrees F.
in order for it to cure. If I am right then it is inferior. But I shall wait for
your reply. Ciao,
Phedon
________________________________
From: nick <nickaikman_at_hotmail.com>
To: Indoor_Construction_at_yahoogroups.com
Sent: Fri, January 7, 2011 1:55:46 PM
Subject: [Indoor_Construction] Re: Carbon fiber cloth for Treger's vp prop hub?
Hi Phedon,
Unfortunately you are wrong.
Test components constructed with pre-preg composites for the whole screw arm
assembly and also the main yoke of an F1D hub have been made by F1D modellers
here in GB and probably elsewhere. These show that very thin pre-preg is
extremely light as well as stiff and gives slightly lighter weights in
comparison to traditional balsa or basswood versions of these components.
CIAO.
Nick.
--- In Indoor_Construction_at_yahoogroups.com, Phedon Tsiknopoulos <phedon21t_at_...>
wrote:
>
> pre-preg is too heavy. It must be TOW. Ciao,
>Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
> Phedon
>
>
>
>
> ________________________________
> From: nick <nickaikman_at_...>
> To: Indoor_Construction_at_yahoogroups.com
> Sent: Fri, January 7, 2011 5:28:14 AM
> Subject: [Indoor_Construction] Re: Carbon fiber cloth for Treger's vp prop
hub?
>
> Â
> Hi Leo,
>
> I asked Ivan to produce the drawings for INAV a while ago. I also have one of
> his hubs and know that the plan spec is correct. I believe that the carbon
>cloth
>
> used is probably a pre-preg and this sort of cloth is not that hard to find.
>
> Maybe one of the indoor glider flyers can point you in the right direction?
>
> Nick
>
> --- In Indoor_Construction_at_yahoogroups.com, "leop12345" <leop_at_> wrote:
> >
> > A recent INAV shows a plan for Ivan Treger's F1D vp prop hub. The composite
> >screw holder is made from carbon fiber cloth and foam. The foam is easily
>found
>
> >but the carbon cloth (looks to be plain weave in the drawing) is specified to
>be
>
> >0.05mm thick. This works out to 0.002" or about 1 oz per square yard in
>weight.
> >
> > I cannot find cloth this light and even 2 oz cloth, at 0.004", is rare (and
> >expensive). Does anyone know if Treger's plan's specification is incorrect? If
>
> >not, does anyone know where Treger obtain the carbon fiber cloth he used.
> >
> > Treger's screw holder is neat because once one makes the composite structure
> >piece, individual screw holders can be quickly cut off, drilled, and tapped.
> >This makes for a neat way to produce many such screw holders.
> >
> > Thanks in advance,
> >
> > Leo
> >
> > Bloomington IN
> >
>
Received on Fri Jan 07 2011 - 18:01:06 CET