the mandrel 160 maintains a uniform diameter fig6 shows the right end 162 of the composite structure on the mandrel 160 as shown this section of the composite structure 140 utilizes external augmentation layers and a non stepped uniform core 60 the use of the internally augmented reinforced section on the left end 168 of the composite structure 140 allows the composite structure 140 to slide off the mandrel 160 after curing alternatively both ends 162 168 of the composite structure 140 may utilize internal augmentation layers to provide a stiffened section for structural interconnections in this regard a mandrel having a uniform diameter from the left end 168 to the right end 162 may be utilized fig7 shows the lay up of the fiber reinforced material layers to the outside surface of the mandrel 160 as shown a fiber placement apparatus 190 is utilized similar to a filament winding machine the fiber placement apparatus 190 is utilized to place a preimpregnated fiber tape tow on the outside surface of the mandrel 160 to form the various plies that make up the resultant composite structure 140 the fiber tape tow is preferably a carbon fiber reinforced plastic cfrp the fiber placement apparatus 190 moves along the longitudinal length of the mandrel 160 on a carriage 195 while the mandrel 160 is rotated the fiber placement apparatus 190 draws the fiber tape tow from a spool 194 interconnected to a placement head 192 as.