I talked to Ray Harlan. He uses a cement, and then he applies the filament to
the component with acetone. The trough method definitely works well. Are we
talking F1D's or electric motor propulsion. For sure he must be thinning the
epoxy down. Since when is epoxy lighter than nitrocellulose cements? My record
breaking CAT I Unlim. CLG being 24" flat span weighs only 4.5g. It is built
entirely with Ambroid. Prof. Mark Drela used Ambroid in his Upstart glider. Case
open until final resolution. It is an excellent subject.
________________________________
From: John Kagan <john_kagan_at_hotmail.com>
To: Indoor_Construction_at_yahoogroups.com
Sent: Sun, January 9, 2011 10:38:19 AM
Subject: [Indoor_Construction] Re: Carbon fiber cloth for Treger's vp prop hub?
--- In Indoor_Construction_at_yahoogroups.com, Phedon Tsiknopoulos <phedon21t_at_...>
wrote:
>
> ...They send it through the Ray Harlan cement cup. No one uses epoxy resins,
>they are just too heavy...
Ray Harlan does.
He machined a trough 1/2 the boron thickness in which he spreads a layer of
epoxy. A fixture holds the boron, laying it in the trough and then placing it on
the model. (all per Ray's verbal description of the process - I've never seen it
myself)
So, "case open" :)
Received on Sun Jan 09 2011 - 15:30:57 CET