. Railway mechanical engineer . grades, with ruling grades of per cent botheastward and westward. The rating on this division is 1,775tons in both directions. On the Seattle division betweenAuburn and Lester, Wash., a fairly uniform per centgrade occurs, and the tonnage rating for this portion of thedivision is 1,600 tons. From Lester to the summit helpersare used and they are also employed on several other divisionsin the mountainous sections. These Mikado type locomotives have a rated tractive effortof 57,100 lb.; 28 in. by 30 in. cylinders and 63 in. drivingwheels, and weigh 337,000
. Railway mechanical engineer . grades, with ruling grades of per cent botheastward and westward. The rating on this division is 1,775tons in both directions. On the Seattle division betweenAuburn and Lester, Wash., a fairly uniform per centgrade occurs, and the tonnage rating for this portion of thedivision is 1,600 tons. From Lester to the summit helpersare used and they are also employed on several other divisionsin the mountainous sections. These Mikado type locomotives have a rated tractive effortof 57,100 lb.; 28 in. by 30 in. cylinders and 63 in. drivingwheels, and weigh 337,000 lb., of which 247,000 lb. is onthe drivers. The boilers are of the conical connection type,provided with brick arches, combustion chambers 36 in. long,tubes 18 ft. long and superheaters. Mallet Type The Mallet type locomotives, railroad Class Z-3, are simi-lar to previous 2-8-8-2 locomotives used on the NorthernPacific. They are employed as helpers in freight service onthe Rocky Mountain and Montana divisions where grades are. Mallet Type Locomotives Used Either as Road Engine or Helper 679 680 RAILWAY MECHANICAL ENGINEER Vol. 95, No. 11 heavy. On the Seattle division they are used as road engines, in. by 96% in., with combustion chamber 56 in. long, tubes handling 2,400 tons between Auburn and Lester, the grade 24 ft. long, brick arches and superheaters,being uniformly per cent. Helpers are used from Lester „. , _~ . „ . , to the summit of the Cascade Mountains. These locomotives have a rated tractive effort of 105,100 These locomotives are of a new design and resemble closely lb. operated simple and 87,600 lb. operated compound. They those ordered by the U. S. R. A. Both designs are of the
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
