That will not work.

Carbon fibre and glass fibre do not have the same stiffness. The carbon
which is stiffer would have to carry the complete load and would break
unless being designed/dimensioned to replace the complete spar. It makes no
sense to mix the two in a spar like that.

Best regards,
Ola Røer Thorsen


Steve Davis wrote:

The wings are reparable so they shouldn't have to
provide free replacements. Since it is a fiberglass
spar cap and the problem seems to be limited to the
wing root it MIGHT be possible to cut a slot into the

rovings and embed some Graphlite carbon fiber rods
into the spar cap. If this is doable the result could
be a far stronger spar than the original design. I

don't think you could do this with a carbon fiber spar
cap but i'm not sure about fiberglass.

http://www.marskeaircraft.com/carbonrod.html