. Railway mechanical engineer . i-in. bridge, used with anIS-in. diameter stack with 26)4-1X1. and 9-in. inside exten-sions. The higher draft as well as the slightly higher draftefficiency was obtained with the 26J/2-in. inside neither of these conditions was the exhaust filling thestack, but with the longer extension (run No. 17) it was more. Fig. 9—Exhaust Stack Diagrams for Runs 39-41, 40, 42 and 43 closely approaching the walls of the stack than in runs with the short extension, as indicated by the exhaustdiagrams shown in Fig. 5. Runs No. 19 and 20 provide acompar
. Railway mechanical engineer . i-in. bridge, used with anIS-in. diameter stack with 26)4-1X1. and 9-in. inside exten-sions. The higher draft as well as the slightly higher draftefficiency was obtained with the 26J/2-in. inside neither of these conditions was the exhaust filling thestack, but with the longer extension (run No. 17) it was more. Fig. 9—Exhaust Stack Diagrams for Runs 39-41, 40, 42 and 43 closely approaching the walls of the stack than in runs with the short extension, as indicated by the exhaustdiagrams shown in Fig. 5. Runs No. 19 and 20 provide acomparison of nozzle style \-l used with an 18-in. diameterstack with Ibl^-m. and 9-in. inside extensions. The betterdraft condition is again observed with the 26J2-in. insideextension; the draft efficiency in this combination was against with the 9-in. extension. The exhaustcolumn and stack diagrams for runs No. 19 and 20 are alsoshown in Fig. 5. It will be noticed with the 26l2-in. insideextension that the exhaust is striking near the bottom of theinside extension, or 43js in. from the top, but with the extension the exhaust, while almost in contact with thestack in its passage, does not absolutely strike until it reachesthe top. Attention should be directed to the marked contrast in thedraft obtained from run No. 17 as compare
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
