The Francis turbine is a type of water turbine that was developed by James B. Francis.

 It is an inward flow reaction turbine that combines radial and axial flow concepts. Most common water turbine in use today. Suitable for hydro-power stations with medium or high head. Compact in structure, reasonable in design, convenient in operation and maintenance and excellent in efficiency. 

They are in both vertical and horizontal shaft arrangement and can be vastly selected by the hydraulic power stations