Engineering and Contracting . 117-iia • COBEY 6 NO. 687-591) • CORE. S «-„,!=^- Chns. L. Newcomb, M.£. iLJ IS -1 H 6 00 1- \ 7 / ?r 0^ -J 0 1 5 1 4 / y / /* v/ / CO 0 A / v) i y r^ 3 ?? //. // / J/ / I 0 A i A / ^ ?/ A ^ »^ m ^ On several hydrants tests were run firstwith the pressure taken at the usual con-nection at the back of the barrel, and sec-ond with the pressures taken at a connec-tion tapped into a cap screwed to the otheroutlet if a two-way hydrant, and from these curves, which give the bestmeans of averaging the several experimentson any one hydrant, that the data for th
Engineering and Contracting . 117-iia • COBEY 6 NO. 687-591) • CORE. S «-„,!=^- Chns. L. Newcomb, M.£. iLJ IS -1 H 6 00 1- \ 7 / ?r 0^ -J 0 1 5 1 4 / y / /* v/ / CO 0 A / v) i y r^ 3 ?? //. // / J/ / I 0 A i A / ^ ?/ A ^ »^ m ^ On several hydrants tests were run firstwith the pressure taken at the usual con-nection at the back of the barrel, and sec-ond with the pressures taken at a connec-tion tapped into a cap screwed to the otheroutlet if a two-way hydrant, and from these curves, which give the bestmeans of averaging the several experimentson any one hydrant, that the data for thetables designed for practical use 1 to 4 inclusive are sample diagrams 100 200 300 400 500 Newcomb GALLONS PER MIN. BV NOZZLE (COL. 6.) quantity of water was obtained from themeters, the Worthington meter • beingused in all of the earlier tests, the Neptunemeter in the later ones. The exact timein which the meter registered an even num- 400 500 coo TOO 800 GALLS. PER MIN. BY NCZ2LE(C0L. 6.) the other outletsmore than two if theoutlets. any one of hydrant had The plotted points from the two tests gave practically the same curve, showing that where more convenient there Fig. 3. showing friction losses, giving actual fric-tion losses for one co-ordinate and gallonsper minute flowing for the other. Fig. 5 gives a similar plotting for theopen-butt tests, pressures at the back of the fc o FIVE IN. HYDR. ONE HOSC • CORET 6 ^ IIOCiKIKe COMPH, ,,«{;.\ MCK.»0»f OATE ai O^-MONECURVE • LUDLOW CHAPMAN l«»-a4 4- MATHEWS «l»*«13-81T • COFFIN coMPfl. *-3»* MS-ata 0 MOLTOXe COMPR. A 7J-r? I F*) Cha9. L. Newcomb, - * # ^^/ j Jo ^ / S m/ / 1 1. f/A^/ / m ,* A w / / h t ^ / / /^ / / A w / ,/ / A ^ -^^j ^ / ^ J 4 y- >^ ^ ^ O 4 lUO 200 300 400 500 600 GALLONS PER MIN. BY NOZZLE (COL. 6.) Fig. 2. ber of cubic feet was noted wi
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