QUESTION 2 - Aerodynamics A savonius wind turbine rotor constructed from two halves of a 175 litre drum as shown in Figure 2 is used for renewable energy generation. The drum is has a diameter of \( \mathbf{5 0 0 ~ m m} \) and a height of \( \mathbf{9 0 0 ~ m m} \). The drag coefficient for the cup shape equals \( \mathbf{C d}_{\text {cup }}=\mathbf{1 . 8} \) The drag coefficient for the rounded shape equals \( \mathbf{C d r o u n d = 1 . 2} \) Calculate using Appendix A. 2.1) The torque turning moment about the vertical Axis ZZ at stand still. 2.2) The bending moment at the base of the rotor at stand still. 2.3) When viewed from the top will the rotor rotate in a clock wise or anti-clockwise direction when operation.