129 2.8.8 Thrust Overshoot 131 2.8.9 Closing Remarks 137 2.9 BLADES..... 139 2.91 StructuralDetails 144 2.9.2 Vibration Frequencies 154 2.9.3 Mode Shapes 160 2.9.4 Bending Moments and Ste88es........................................................................... 165 vii