Harvard Engineering Journal : Devoted to the Interests of Engineering And Architecture At Harvard University
Harvard Engineering Journal : Devoted to the Interests of Engineering And Architecture At Harvard University
Harvard Engineering Society
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Engrs,, June, 1907. t43 Exchange Place, New York. Digitized by Google Digitized by Google WOOD STAVE PIPE LINE. 43 mum velocity of 8 ft. per second. The total fall from the level of the water above the dam to the tail race is 123 feet, of which 115 ft. are utilized by flie power house. Using this loss of head of 8 ft., the volume of water available at the power house, figured from Kutter's formula, where N. equals .13, gives a ^ discharge of 506 cubic feet per second, or an average velocity of ...about 6 ^ feet per second. After the plant was put in op- eration, ^Ir. M. Hebgen, the General Superinteildent of the Company, made a series of tests by the Pitot tube method, and found that the actual quantity of water delivered under the above conditions was 580 cubic feet per second, or 15 per cent in excess of that shown by the formula. This amount corre- sponds closely with the formula if N. be used as .12. The grade upon which the first pen-stock was built was made of sufficient width for a second pipe to be laid parallel with it, and it was recently found necessary to provide a 12-ft.
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