. American engineer . has been secured. At the same time theincrease in total weight on driving wheels is only 26 per on the same l)asis the Mikados provide a maximumcapacity of 2,100 horse power and the consolidations only 1,543horse power. Tlie Mikados have a weight on drivers of 216,500lbs., and the consolidations 171,600 lbs. The factor of adhesion only difference being in the length of the smokebox. In theMikado type the greater distance between the center of the cylin-ders and the forward driving wlieels required an increase of 6 the distance between the front tube
. American engineer . has been secured. At the same time theincrease in total weight on driving wheels is only 26 per on the same l)asis the Mikados provide a maximumcapacity of 2,100 horse power and the consolidations only 1,543horse power. Tlie Mikados have a weight on drivers of 216,500lbs., and the consolidations 171,600 lbs. The factor of adhesion only difference being in the length of the smokebox. In theMikado type the greater distance between the center of the cylin-ders and the forward driving wlieels required an increase of 6 the distance between the front tube sheet and the center ofthe cylinders, but in other respects they are practically identical. I?oth designs embody the new features introduced by the build-ers within the past two years—viz., outside steam pipes, self-centering adjustable valve rod crosshead, self-centering guide forthe piston rod extension and tlie improved outside bearing trail-ing truck. One of the Mikado type locomotives is equipped with a Street. Powerful Mikado Locomotive for the Buffalo, Rochester & Pittsburgh. provided in the Mikado design is, of course, a little less thanin the case of tlie consolidations. Both, however, are well withinthe limits of good practice. Conservatively estimated, it will require an evaporation persq. ft. of heating surface per hour of not more than lbs. ofsteam at 180 lbs. pressure to develop the cylinderhorse power of the Mikado, as compared with at least 210 lbs. pressure to give the maximum capacity of the con-solidations. This comparison shows the much larger boilercapacity provided in the Mikado type, which is one of the mostimportant advantages of this type nf wheel arrangement. mechanical stoker. The general dimensions, weights and ratiosof the two types of locomotives are shown in the following table: General Data. Type 4-6-2 2-8-2 Gage 4 it. SA in. 4 ft. 8^ in. Service Passenger Freight Fuel Bit. coal Bit. coal Tractive eflfort .16,312 lbs.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1912
