I find it is very easy to apply the slurry, I use a scrap peice of ply
about 2 millimetres thick, by about 6 inches wide, pour the slurry directly
onto the foam, and spread from the centre out to the edges, I then work the
slurry untill all the voids are filled, and scrape of any excess, leaving no
ridges. It takes a bit of scraping and working to get an even finish. My
scraper has each end sanded slighlty high, so that it is does not contact
the foam, you don't get any build up of slurry around the edges leaving
lines and ridges, it really does not need any sanding when dry. I leave to
dry on a very flat surface on grease proof paper, and when dry enough, do
the opposite side of the sheet asap, other wise you tend to get a bent sheet
of foam, if I have to do one side only, then I usually weight it to keep it
flat. I have only done flat sheets so far for cutting up into fuel tanks
etc, have not tried any wing sections. The SAAA here are supposedly running
courses on welding, riveting, glassing, including vacuum bagging etc, but
wouldn't hold out too much hope on this.
Chris Johnston
North Richmond NSW
Australia
----- Original Message ----- e
From: "Dan Heath" <da...@alltel.net>
To: <kr...@mylist.net>
Sent: Friday, June 30, 2006 11:39 AM
Subject: Re: KR> hard shell layup
>I have never tried the "hard shell" method, because I cannot imagine being
> able to get the slurry on without ridges, and then trying to sand the
> ridges
> without making divots in the foam.
> Don't do it without putting on the slurry as you need a barrier to the air
> that will cause bubbles and you need something to grab on to the pores in
> the foam.
>
> One thing you will find when building your KR, the closer you stick to the
> plans and to proven methods, the faster you will be enjoying your plane.
>
> See N64KR at http://KRBuilder.org - Then click on the pics
> See you in Mt. Vernon - 2006 - KR Gathering
> There is a time for building and a time for FLYING and the time for
> building
> is OVER.
> Daniel R. Heath - Lexington, SC
> -------Original Message-------
> from all three methods, is one superior to the other?
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