Originally posted by agower
where i am everyone would call the cgm grpahite and the rayspeed or similar, carbon fibre...
Whilst they're not wrong - they're not right either!
Graphite + Carbon Fibre = Exactly the same material.
In the USA, Graphite is the more commonly used term. In the UK, the term Carbon Fibre is more commonly used.
Composite Carbon Fibre/Composite Graphite is the material used on the CGM's chassis. It's basically a carbon reinforced plastic. (similar to FRP - fibre reinforced plastic & GRP glass reinforced plastic).
WCF - Woven Carbon Fibre is made from Carbon Fibre Cloth that is layered and coated with resin. The number of layers and also their orientation to each other determine the strength & stiffness of the WCF sheet. This is the material used on the RS. The SSG material differs slightly in as much that it has a silver surface which I believe is achieved by causing some sort of chemical reaction. More importantly from our point of view, it lacks the extra 45 degree weave that better quality WCF sheet has - thus the greater amount of flex across the chassis compared to after market chassis, like the RS for example.
Hope this helps.
Regards the CGM - it's stiffer because of the very nature of bath-tub type chassis. Incidentally, WCF bathtubs also exist which offer similar stiffness levels - but of course they look much nicer
and cost loads
Perhaps one often overlooked feature of WCF is it's ability to remain stiff, even during really hot weather when track temps can get very high. Over the years, one critisism of the TC3 was a tendancy for the chassis to go 'soft' on hot race days.
Johnbull lives in Malta where it's really hot, so I guess if the CGM was going to suffer from heat, he'ld have told us about it by now -so I suppose it hasn't been an issue.