that can cure with themselves include 5250 4 rtm bmi resin manufactured by cytec chemical co there is no criticality in the choice of stabilizer other than that it have sufficient adhesiveness to hold the fiber ply in its shape and be compatible with the later injected resin any fiber material such as glass graphite silicon carbide or aramid may be used as well as any fiber type or size for producing the fiber ply the fibers themselves may be of any particular orientation desired in the finished part and may comprise weaved or braided fibers among others after the first fiber ply has been formed the impermeable layer restraining means and release film are removed then a second fiber ply is placed over the first ply using the same sequence of steps described in relation to the first ply fig6 shows a second ply 20 placed over the first shaped and stabilized ply 6 using the same tool 8 the process is repeated until the desired number of fiber plies are properly assembled and this can be from 2 to 30 or more depending on the construction sought fig7 shows a stabilized preform 21 on the tool 1 having four plies 6 20 22 and 23 which have been processed through the stabilization step more plies could be added as required fig8 shows a final preform 23 removed from the tool and ready for molding the final step in producing the corrugated composite channel is to place the preform 23 into a mold injecting resin into the mold and curing the resin of course any resin can be used while the above has been described in relation to a plurality of single plies formed one.