Carbon v Glass

Happy New Year!

I am doodling a 15' hiker (I know there's plenty already available) and wondered what the cost/weight difference between glass and carbon might be?

Do any of you Cherubby chaps know how much weight is saved by building from carbon/foam sandwich rather than glass/foam sandwich.  And what is the cost increase?

Also, any thoughts on whether to go for SAN (Corecell) or PVC foam core?

Cheers

Phantoms changed from polyester to epoxy - the hulls are not carbon.  My Vandercraft hull has 2kg correctors to bring it up to the minimum weight of 61Kg (including foils etc).  I believe this is about the usual now.

Carbon masts and booms were also introduced a few years ago now.  The adjustable carbon rig has made a big difference to the sailability of the boat - its now a real pleasure and has opened up the weight range.

Red Eye sails are also introducing a new hiking single hander, based on a smaller Phantom. Check out http://www.redeyesails.co.uk/Redeye%20Solution.htm

The material on the outside of the hull is there primarily for impact resistance so it is not quite as critical to use the strongest possible material. The reinforcement inside the hull is where most of the forces will be concentrated. This is where strength is most important.

On the Swift Solo I'm building we use S Glass on the outside of the hull - about 30% stronger than E glass from memory. On the inside we use a carbon/ kevlar composite which is strong! and expensive. If you are considering doing something at home I would suggest that you use epoxy. It is stronger and more expensive but the main thing is that it doesn't stink like polyester.

If you want something that is strong light and not too expensive I would use E glass on the outside, carbon on the inside and epoxy as your resin.

Thanks for all the advice, it's much appreciated.

I suspect it will remain a paper exercise as I have no facilities (or skill!) to build the thing, but the design is intended for my local lake and so would only sail on flat water and rarely go out above a force 4.  Therefore it would be unlikely to get bashed about too much, but I'd want it to survive if it did get dinged.

I will/would probably opt for the 200g/m۔² carbon in epoxy each side of foam, with extra 100g/m² glass ouside.  Sub 60kg would be the aim. 

The Phantom class association has a web site at: http://www.phantomclass.org.uk/

I think there is a for sale page, although this may have moved to be on the forum now.  I bought a second hand GRP boat to start with as I recall for about £2500, and then bought a new one (almost new anyway) after deciding that the Phantom is the boat for me.