In a small hydro development a Kaplan turbine runs under a head of 2.1 m. It has a runner of 3.5 m..

In a small hydro development a Kaplan turbine runs under a
head of 2.1 m. It has a runner of 3.5 m diameter and develops 600 kW at 80 rpm.
Assuming an overall efficiency of 80%, estimate the discharge and specific
speed of the machine. If a 1.5 m diameter homologous turbine is to be tested at
a head of 3.0 m, What are the rotational speed, discharge and power of that
unit?