that should read: and as you implied,  with carbon , you have to do a lot
of engineering  just to get close to taking advantage of ANY savings in weight
and no matter what you do carbon it will still be higher priced then the same
part built to an  equal strength with glass cloth... Timothy


--- On Sun, 6/21/09, Timothy <flytcher@...> wrote:

From: Timothy <flytcher@...>
Subject: Re: [highefficiencyvehicles] Re: Body Replacement/ carbon? why????
To: highefficiencyvehicles@yahoogroups.com
Date: Sunday, June 21, 2009, 8:46 PM
























 graphite Greg? LOLMy point is it need not be anything more exotic then
glass cloth and epoxy resin over extruded  poly styrene. .. that's what I like
to build with and it is cheap... light... and about 200 times stronger then
sheet steel pound for pound... nothing new or over priced... and as you said you
have to do a lot of math just to get close to taking advantage of ANY savings in
weight and no matter what you do it will still be higher priced... 

Timothy...

P.S. I've worked with kevlar, boron, nomex, carbon, ceramic and many, many,
other materials with a lot of different type resins... and for my own use I
chose fiberglass cloth, pink dow foam board and aeropoxy resin... cheap and easy
to work with... can't beat it... :)



--- On Sun, 6/21/09, Greg Locock <greglocock@yahoo. com.au> wrote:



From: Greg Locock <greglocock@yahoo. com.au>

Subject: [highefficiencyvehi cles] Re: Body Replacement/ carbon? why????

To: highefficiencyvehic les@yahoogroups. com

Date: Sunday, June 21, 2009, 6:30 PM



--- In highefficiencyvehic les@yahoogroups. com, Timothy <flytcher@.. .> wrote:



>



> I'd like to know who says carbon fiber is really that much "better" then just
fiberglass?? ?



>



> ok it is a little bit higher on the strength to weight... but is that really
worth the cost??? I don't think so... might as well use titanium if you have
that deep of pockets...



> all factors need to be figured into what works best... and if it's unubtainum 
then what's the point? I think most people want carbon only because it's "cool"
not because they have worked with it or done their homework... 



Good point Tim. I have been involved in the design and build of a carbon fibre
car, and I doubt anyone could make effective use of CF for one without a lot of
experience (basically I learned enough to know how little I knew). I think for
most people using CF as a reinforcement/ stiffener is a better trick than making
the whole thing from graphite.



Cheers



Greg





























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