lbs of only 0 278 inches a third embodiment is illustrated in fig4 which may be referred to as the thick core 46 embodiment in this embodiment the core thickness 18 was increased to approximately 1 25 inches the upper and lower sheet thicknesses 30 44 were kept at 0 017 inches apiece preferably comprised of 2 ply 3k 70 pw cloth at 0 085 inches per ply by increasing the core thickness 18 while retaining original sheet widths 30 44 the flex load was found to be 269 lbs and the deflection at 100 lbs was found to be 0 2 inches it should be understood that all test data in this patent is for illustrative purposes only in regards to the improvement of damping and flex characteristics finally a fourth embodiment is illustrated in fig5 which may be referred to as the mixed face sheet 48 embodiment in the mixed face sheet 48 embodiment the upper face sheet 36 is comprised of a high strength face sheet while the lower face sheet 24 is a low strength damping face sheet the high strength face for example can be comprised of carbon graphite tape laminate such as sold by hexcel corporation under the trade name as 4 magnamite in this embodiment the core thickness 18 may remain the same but the upper face sheet 36 is preferably comprised of grade 190 tape with plies of 0 90 at 0 0075 inches combined to arrive at a upper sheet width 44 of 0 017 inches the lower damping face sheet 24 is.