The following data pertains to a vertical shaft Francis turbine, such as diameter of the runner at the inlet = 2 m, width of the runner at the inlet = 0.27 m, speed = 420 rpm, discharge = 15 m 3 /s,...

The following data pertains to a vertical shaft Francis turbine, such as diameter of the runner at the inlet = 2 m, width of the runner at the inlet = 0.27 m, speed = 420 rpm, discharge = 15 m³/s, velocity at the inlet = 10 m/s, pressure head at the inlet = 230 m, elevation above the tail race = 5 m, hydraulic efficiency = 98% and overall efficiency = 92%. Find out (i) the total head across the turbine, (ii) power output, (iii)  guide blade angle and (iv) vane angle at the inlet.