. Railway master mechanic [microform] . has increased steadily and consist-ently up to 1900, after which time 200 pounds appearsto be the more general boiler pressure for simple en-gines, while in some instances it has reached 225pounds on compound locomotives and in recent yearsis generally higher than 200 with this type. Compar-ing the curve of the freight locomotive with that ofthe passenger, simple pasenger locomotives are oper-ating under higher boiler pressure than the simplefreight engines. Weight on drivers and total weight of locomotivehave increased together and consistently. The sma
. Railway master mechanic [microform] . has increased steadily and consist-ently up to 1900, after which time 200 pounds appearsto be the more general boiler pressure for simple en-gines, while in some instances it has reached 225pounds on compound locomotives and in recent yearsis generally higher than 200 with this type. Compar-ing the curve of the freight locomotive with that ofthe passenger, simple pasenger locomotives are oper-ating under higher boiler pressure than the simplefreight engines. Weight on drivers and total weight of locomotivehave increased together and consistently. The smalldiameter of the freight locomotive driving wheels per-mits the mud ring of the modified wide firebox to ex-tend beyond the frame so that the trailing wheel isusually unnecessary on locomotives in such change in the direction of the curve is not soabrupt as in the case of the passenger curve wherethe influence of the introduction of the wide grate andtrailing wheels is clearly marked. January, 1904 RAILWAY MASTER MECHANIC. /878 80 8Z 84 86 86 90 9Z 94 96 98 /900 OZ 04- Fig. 3—Steam Pressure. XIO0O0m Ziooodiizoooknooool IQOOOtk fflOOOA mom I50000& mooooooo\jzooooi
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Keywords: ., bookcentury1800, bookdecade1890, bookidrailwaymaste, bookyear1895
