Re: Re: Is there a market for...

From: Jake Palmer <82.jake_at_gmail.com>
Date: Tue, 28 Jan 2014 08:57:34 -0800

Mike,

I think once epoxy hits carbon you start crossing a line regarding the BOM
rule. If I was flying in a major competition and I found out someone was
using bought prop blades, I would file a formal complaint.

Jake


On Tue, Jan 28, 2014 at 8:48 AM, mkirda_at_sbcglobal.net
<mkirda_at_sbcglobal.net>wrote:

>
>
> Leo asked me some questions off-line. I am posting my answer here.
>
> Hi Leo.
>
> The only real difference is the fact that I adapted some different methods
> for making my mold.
> His way of making the center one thickness is a bit too much work for my
> tastes.
> I layered the center layer so a taper was evident when split apart. A lot
> less sanding. I hate sanding.
>
> I also ran it through a vacuum. I am beginning to think it is not
> necessary, adds some complexity, and may not be helpful.
>
> 12K tow would involve an insane amount of sanding. Even 6K is too much. 3K
> is what I have and works well.
> A single tow around will weight roughly 70mg and it is not thick enough to
> match Brett's 0.015" square root specification.
> It needs to be doubled out roughly 1/3 of the way then sanded to the specs.
> 82-85mg is about what they come out of the mold at.
>
> Cut to size, dip in resin, squeeze in to make sure it penetrates, squeeze
> out the excess, pop into vacuum bag for 10 minutes at 24" vacuum to suck
> out the excess resin, then wrap around the mold, let gel and post cure at
> the temp specified by the resin used. Pretty much the same as Brett minus
> the vacuum bag part.
>
> None of my sources have panned out completely yet.
> If something does pan out, I'll probably sell the fiber to folks since
> there is no other source now.
> It costs $2000+ per pound and the manufacturer has a 5KG minimum.
> It isn't clear to me that there really is a market for it though to be
> honest...
>
> Regards.
> Mike Kirda
>
>
>
Received on Tue Jan 28 2014 - 08:57:35 CET