International Correspondence Schools · Scranton, Pa. : The Colliery engineer co. · leaf 413
YDROMECHANICS. 401 necessary, they should be as large as the circumstances willpermit, so as to change the direction gradually. Suddenchanges in direction destroy the velocity very rapidly, and,consequently, reduce the discharge. A reduction or in-crease in the size of the pipe, owing to screwing… … Fig. 185. A bend at right angles, as shown in Fig. 186, is verydestructive to the velocity. A rounded elbow, as shown inFig. 187, should be used, and the radius should be made aslarge as possible.
Railroad engineering
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