The Hiwassee turbine, having a rated output of 80,000 hp at 190-ft head, is believed to be the highest-powered Francis wheel in the eastern United States. The Norris turbines are identical in physical size with the Hiwassee unit and have a rated output of 66,000 hp at 165-ft head. In this paper, considerations affecting the selection of these machines are discussed, and principal features of the design and acceptance testing are described.

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