Electrical news and engineering . s-entative of small plants of its class. A close inspection afterthe test showed the wheel and bearings to be in good con-dition, although some play on the bearings was observed. Asfar as the wheel and mountings were concerned, it was ap-parent that the full original efficiencies of the wheel should have been obtained, but in fairness to the manufacturers,and in explanation of the low efticiencies actually obtained,it should be stated that the tail-race conditions immediatelyunder the turbine were not good and piling up of the watertook place, with consequent
Electrical news and engineering . s-entative of small plants of its class. A close inspection afterthe test showed the wheel and bearings to be in good con-dition, although some play on the bearings was observed. Asfar as the wheel and mountings were concerned, it was ap-parent that the full original efficiencies of the wheel should have been obtained, but in fairness to the manufacturers,and in explanation of the low efticiencies actually obtained,it should be stated that the tail-race conditions immediatelyunder the turbine were not good and piling up of the watertook place, with consequent loss of operating head. The ex-tent of this piling up could not be ascertained as it occurredaround the draft tube beneath the flume. The average re-sults of the tests made are given in the following Head Speed Discharge Turbine Eflfcy. Full 275 159 H 280 139 ]2 280 99 For the new development it was decided to use the samehead of 22 feet, utilizing the existing dam, but instead of the. Exterior view of power house of the Mushamush hydro-electricdevelopment in Nova Scotia old timber flume and power-house to build a new plant withbetter construction throughout and with a larger turbine ina more permanent and efficient setting. The turbine wasselected for a head of 24 feet as it is the intention to increasethe height of the dam bj two feet when the load becomeslarge enough to warrant doing so. In selecting equipment for the new plant, it was necessaryto bear in mind that the new development must be begunand carried to completion as early as possible. Some consid-eration was given to utilizing a high speed runner of the Nag-ler type but for various reasons this was not entertained,particularly when it was found that the S. Morgan SmithCompany had already constructed a wheel suitable in everyrespect, which could be shipped on short notice. It wasalso fortunately learned that the General Electric Companyhad under construction in their wor
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