Tyson turbine explained

The Tyson turbine is a conical water turbine with helical blades emerging partway down from the apex gradually increasing in radial dimension and decreasing in pitch as they spiral towards the base of the cone. This design doesn't need a casement, as it is inserted directly into flowing water.^[1]

Marketed as part of a hydropower system that extracts power from the flow of water, the turbine is mounted below a raft, driving a power system, typically a lift irrigation pump or generator, on top of the raft by belt or gear.^{[2] [3] [4]} The turbine is towed into the middle of a river or stream, where the flow is the fastest, and tied off to shore. It requires no local engineering, and can easily be moved to other locations.

Notes and References

1. US. 4722665. patent. 1988-02-02. Warren N. Tyson.
2. Tuckey. A.M. . D.J. Pattereson . and J. Sewnson. A Kinetic Energy Tidal Generator in the Northern Territory – Results. 23rd International Conference on Industrial Electronics, Control and Instrumentation IECON 97. November 1997. 937–942.
3. Khan. M.J. . G. Bhuyana . M.T. Iqbal . J.E. Quaicoe. Hydrokinetic energy conversion systems and assessment of horizontal and vertical axis turbines for river and tidal applications: A technology status review. Applied Energy. 2009. 86. 1823–1835. 10.1016/j.apenergy.2009.02.017.
4. Anyi. Martin. Brian Kirke . Evaluation of small axial flow hydrokinetic turbines for remote communities. Energy for Sustainable Development. 2010. 14. 110–116. 10.1016/j.esd.2010.02.003.