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[phil_kirk]

Ideally everything should be made from the right materials which are donated or purchased at low cost.  However if you have to buy your carbonyou will want to make it go as far as possible.

I have experimented with the simple fronting plate.  Traditionally these are made from solid carbon.  I have used 10 layers of 200 gramm carbon.  That's quite an area of carbon.

I recently fitted E--numbers with a plate made mostly from glass and only the outer layers were carbon.  Since glass is a 5th of the cost of carbon that could relate to a reasonable cost saving for anyone on a tight budget.
I wanted the plate to be load tested before offering this up.  It has and Nick didn't manage to remove it at the inlands.

[Born Slippy]

We'd  +1 this.

EJ's fronting plates were made in the same way. Carbon in the outer fibres only - Phil you are correct as this is the only place they do any work. As an additional pimpage. Add a small quantity of "Peruvian Darkness Liquid" into the resin and the glass layers turn black.

As the density of glass is lower this is also lighter?

[tim_unerman]

Born Slippy the density of glass fibre / epoxy is between 1.8 - 2.1 tonnes/m^3 and the density of carbon fibre / epoxy is between 1.5-1.7 tonnes/m^3. If both plates are the same thickness the carbon plate will be lighter.

[phil_kirk]

Beaten to it then but first to let the secret out 

I worked out that this detail alone would save about £15 if you had paid full price for your carbon and glass.

There are probably other areas where this technique can be used without reducing the strength of the boats.

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