carbon fiber testing Four test panels were laid up, all using carbon fiber - 6.2oz 2x2 twill, from left to right they are: 7 layers (control-no vacuum or breather), 14 layers, 7 layers with half covered by a single layer of lighweight Kevlar (yellow in photo) and a 1/2" honeycomb skinned with two layers of carbon fiber on each side.         From top to bottom: honeycomb, 7 layer solid laminate, 14 layer solid laminate.             Just prior to turning vacuum on.             Post cure.             All samples above were ~4"x25". All were vacuum bagged and cooked (elevated temperature epoxy). Samples are now currently at a materials lab (11/13/04-) for testing. Go to the next page to see some crude testing that illustrates the stiffness of each sample.     To learn why an oven is an important part of advanced composite fabrication, please click here.