Darryn,

What I was talking about is slightly different, I think what you are describing is a sandwhich construction, where a composite skin is sandwhiched with an Al skin or honeycomb.

I was talking about a aluminium that has carbon fibres impregnated into it.

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In this case you get a composite that is nearly as light as Al but as stiff as steel.

Gareth
www.fourhulls.com