That is probably the best you can do without going to high modulus carbon.
From what I've seen on the net high modulus carbon really only tows made up of smaller diameter carbon fibres. The diameter of a 12 K HM carbon tow is about half that of the normal carbon tow. Physically this means that there can be about 5 X the number of carbon fibres / 1 mm2 of HM laid up carbon The reason for this is that the smaller fibres will be packed closer in the spar giving higher density and therefore higher strength for a spar made of this material. Quoted figures :- Normal carbon diameter of tow = 0.95 mm High Modulus tow = 0.41 mm The Eagle RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format