Abstract
To conserve natural ecosystem and coexist with nature, this paper proposes a new type hydraulic turbine, named "Gyro-Type Hydraulic Turbine" by the authors, suitable for shallow streams with high velocity in mountain torrents and/or rivers, accompanying with the principle of the rotor works and discussions of the model test results. This hydropower unit scarcely disrupts the natural streams and environments, that is, it is not necessary to start the public works on a large scale because the generator connected with the shaft can be easily set on the simple stand over the water level. The rotor has the self-motive power and is driven by the drag force of the blade facing to the downstream at the low rotational speed. With the increase of the rotational speed, the rotational torque comes to be successfully caused by the lift forces of the blade not only facing to the upstream but also facing to the downstream.
