Ac the time the contract was initiated, PHS was considering several alternative data systems employing the Savonius rotor to gather circulation data in the Great Lakes. The various Savonius rotor meters now on the market use the same rotor but details of the rotor housing vary widely and some of these have been shown to significantly affect performance of the transducer. Therefore, the results given in this report strictly are applicable only to the particular, models tested. However, in the interest of providing a reasonable estimate of the actual problem confronting FHS in their 11m-nological survey, discussion (and often conjecture) is pointed to the probable relation of these results to the operation of the specific current meter recently selected by PHS; namely, the so-called Richardson meter manufactured by Geodyne Corporation.nThe scope of the PHS interest under this contract was the influence of vertical motion on the Savonlus rotor current meter. This report, however, embraces several other aspects of meter performance derived from the ONR-Hytech supported work that seem pertinent to the PHS application and some of which need discussion for proper interpretation of the vertical motion results.
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