The Power Generation Business Unit of Westinghouse Electric Corporation manufactures electric generators commonly used in power generation. These generators require an electrically insulative bracing structure to support the stator coil (armature) windings at each end of the machine. Several large circular cross-ply composite rings are used to support the stator coil winding; adding stiffness to the structure to prevent excessive deflections in the stator coils resulting from peak electromagnetic loads which occur during electrical transients; There is concern regarding the achieved physical properties of the cross-ply wound composite rings due to limited processing capabilities and process variation. The support ring strength and modulus properties are critical to performance. Westinghouse has performed testing of flexural strength, flexural modulus, shear strength, and shear modulus at various temperatures to determine the mechanical properties of manufactured composite support rings. Discussions of measured properties, in relationship to composite material design theory and manufacturing parameters, are provided.