Table 3: Calculation summary to determine the turbine speed and PCD.

NameSymbolUnit Value

Number of jets1234
Jet diametermm77.054.444.438.5
Runner PCDPCDm699.667494.740403.953349.834
Available PCDPCDmm700500425350
Turbine speedrpm371520611742
Gear ratio4.042.892.452.02