I have all these materials.
Two ply 284 style carbon non vacuum bagged open lay up is 0.8 mm thick and weighs about 85 grams.
0.8 bare plywood is 60 grams sq foot. Bu the time the plywood is varnished on the inside and fabric covered and painted on the outside it will be about the same weight as the carbon just painted.
Grain vise the plywood has about the same stiffness as the carbon however it will break much sooner then the carbon will.
Across the grain the plywood is obviously much less stiff and far weaker then carbon.




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