On Wed, 04 Jan 2006 19:05:51 -0800, Richard Riley
wrote:

On 4 Jan 2006 18:08:58 -0800, "Lou" wrote:

oes anyone have the knowledge of what the weight difference is between
:1 square ft. of 3 mil. plywood and 1 square ft. of 1/2" styro core
:composite?
:Or maybe someone could give me the weight of the 1 square ft. of 1/2"
:styro core composite?
: Lou

Sorry, not enough information to be accurate but we can wing it :^)

The core's going to be around 2 - 3 oz. Bidirectional fiberglass will
be about 1 oz per ply plus 1/2 oz per ply for epoxy. 2 or 3 plies per
side, so about 8 to 12 oz. YMMV

You can make it a whole lot more compact if you use Vinyl Ester Resin
though. I'm assuming you are talking about Styrofoam (TM) the blue
construction foam. (has a styrene solvent in it)

I was using some Styrofoam as spacers under one corner at the front
end of the G-III. I "dripped" a little excess Vinyl Ester resin on
the *stuff* and it just plain vanished. I guess there is a reason
they don't use that stuff on wet lay-ups over Styrofoam cores. :-))

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com