. Experiments upon the discharge of water through small fire hose and nozzles. 18. F/G. /O. 19. stream was effective for irore than fifty feet. (See 11). It mustbe remembered, however, in comparing these nozzles that nozzle B waslarger than either nozzle A or C and this would account in part for thelesser effect of the wind on its discharge. The length of the cylindri-cal tip on the nozzle also affects the quality of the stream. Whennozzle B was being finished on the inside an opening of inches indiameter was tried, but it did not give a solii stream. It was thendrilled to 0.^00 in.
. Experiments upon the discharge of water through small fire hose and nozzles. 18. F/G. /O. 19. stream was effective for irore than fifty feet. (See 11). It mustbe remembered, however, in comparing these nozzles that nozzle B waslarger than either nozzle A or C and this would account in part for thelesser effect of the wind on its discharge. The length of the cylindri-cal tip on the nozzle also affects the quality of the stream. Whennozzle B was being finished on the inside an opening of inches indiameter was tried, but it did not give a solii stream. It was thendrilled to 0.^00 in. in diameter, thereby giving a longer cylindricaltip. This gave a stream which would carry much farther before breakingup. The data on friction in hose shows that the unlined linen hosegives a loss of head nearly twice as large as the rubber lined cottonhose. The friction factor for 1 i/5-in. smooth cast-iron pipe as deter- s • 0010c mined from Darcys formula r = .0±92 + — is .0553. This, it v;ill be a noted, agrees closely with the friction factor for the rubber lined gene
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