----- Original Message -----
Sent: Monday, April 11, 2005 5:53
AM
Subject: [FlyRotary] Re: SQ2000 flying
again
Did you see
Richard Sohn's trick for making a fiberglass tube at Shady Bend? Basically you
overfill a section of an inner tube with sand. Once filled you can bend and
shape it. Glass it. Remove the sand. Peel out the inner tube. Bingo. A
perfectly smooth fiberglass duct of the correct dimensions and
shape.
Hi
John,
I heard about
that, or read it somewhere, but never got around to trying
it. Seems like it would need to be attached in place on the
engine to make sure it was in the proper shape, but I don't have room to
work around all the other stuff to try to glass it there.
Now I could
fill the hose with Sakrete and sand, then put some water in it before putting
it in place. Once hardened, you could take it away, and glass it on the
bench. Of course you'd have to put a couple layers on, then cut it apart
to get it off the concrete tube, but you could easily put another layer on it
go glue it back together.
Maybe I'll just
keep putting this off :-)
Cheers,
Rusty
I have to clarify
some thing on the fiberglass mold.
I made a plug out of
styro foam and painted it with water base Latex until it was smooth. When it
was dry I coated it with mold release(PVA) and than wrapped the fiberglass
around. I am using mostly VE for the convenience vs Epoxy. So I have to be
careful not to expose the foam to the resin. When it is cured, I heat the
whole thing with a heat gun until the foam shrinks and takes the Latex with
it. I is getting small and soft enough to just fall out of the FG with the
inner surface as smooth as the plug was to begin with, and no mess with gas
and melted foam.
Richard
Sohn
N-2071U