Re: Re: Carbon fiber cloth for Treger's vp prop hub?

From: <themaxout_at_aol.com>
Date: Sun, 9 Jan 2011 12:16:06 EST

The best strength to weight composite is the one that works for the least
weight.
 
I suppose it's a matter of scale...if the fuzzy fiber has no continuity,
"fuzzy" fiber reinforces the matrix. Like chopped strand in concrete will
do...demo'd in wafer board and particle board. The glue is the strength,
sawdust is the filler. Glue usually doesn't have any bending strength and
the fillers "shift" the load path in the matrix to a shear path...still
limited by the shear strength of the glue. (Note: concrete doesn't have any
real bending strength either...it is a great compression material and to
getting any other type of strength is done be reinforcement).
 
Also different parts call for different makups. Pre-preg has its design
application. It's advantage is like I said before.
 
If you could make an epoxy part with chopped fuzzy strand, the that would
be cool, but is that better from a strength to weight standpoint? These
kinds of trades are the ones to be made....a F1D Gizmo Geezer?
 
Modern prepreg have the beauty of selection consistency in the fiber/matrix
 makeup. There are many different fibers and strengths out there...and
epoxies. You can get prepregs of most any fiber / matrix makeup. In the
"old" days, all we had were dry fibers of glass and "wet" epoxy. We tried to
come up with process that duplicated lab tests on the best makeups.
 
Rick Pangell
Editor of "The Max-Out" Newsletter of
The Magnificent Mountain Men FF Club of Colorado

 
In a message dated 1/9/2011 9:59:00 A.M. Mountain Standard Time,
f1diddler_at_yahoo.com writes:

Are you claiming that dry fuzzy carbon, after hit with Duco has better
strength to weight ratio than modern prepreg carbon?
Received on Sun Jan 09 2011 - 09:16:20 CET