. Railway mechanical engineer . Samples were taken from the tender during each trip andwere later analyzed. The average analysis was as follows: February, 1919 RAILWAY MECHANICAL ENGINEER 73 Analysis of Coal as Fired Volatile Fixed Moisture combustible carbon 7615 7142 E. t . u. perAsh pound coal 10,184 11,008 The coal consumption and firing rate are shown below: Coal Consumption TestNo. ri-E 2-W3-W4-E [ Ave. r 1-W 2-E I 3-W I 4-E Totallb. coal ,-15020,82019,505 19,79429,45022,10025,85520,930 lAve. 24,584 Averagelb. c
. Railway mechanical engineer . Samples were taken from the tender during each trip andwere later analyzed. The average analysis was as follows: February, 1919 RAILWAY MECHANICAL ENGINEER 73 Analysis of Coal as Fired Volatile Fixed Moisture combustible carbon 7615 7142 E. t . u. perAsh pound coal 10,184 11,008 The coal consumption and firing rate are shown below: Coal Consumption TestNo. ri-E 2-W3-W4-E [ Ave. r 1-W 2-E I 3-W I 4-E Totallb. coal ,-15020,82019,505 19,79429,45022,10025,85520,930 lAve. 24,584 Averagelb. coalfiredper ,2623,9033,5233,744 3,5994,5584,3004, 4,401 Lb. coalper hr. per sq. ft. 73. Lb. coal Lb. coalfired per fired per100-car locomotive ? Lb. coal fired per gross ton-miles Fig. 2—An Improved Metfiod of Applying the Thermic Syphonto the Throat that the boiler of engine 7615 was more responsive to the de-mands made upon it than that of engine 7142. It will be noted that the average boiler horsepower devel-oped by locomotive 7615 was , as compared with 834,8horsepower for engine 7142. This is to be accounted for bythe fact that engine 7142 consumed per cent more waterper thousand gross ton miles. Neither of the locomotives wasforced to the limit of the capacity of the boiler. Engine 7615developed a ma.\imum boiler horsepower of 1,015 on thegrade from Milwaukee to Brookfield. This is at the rate lb. equivalent evaporation per square foot of healingsurface per hour. Both locomotives had double exhaust nozzles with at the time these readings were taken. On the last roundtrip with engine 7615 the tips were enlarged to 3-11/16 , which reduced the vacuum somewhat. The frontend temperatures
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
