. Railway mechanical engineer . L. V. T.\BLE II—Comparison of He-wy Pacific Type Locomotives Road U. S. R. A. Year built 1919 Tractive effort, lb 43,900 Total weight, lb Weight on drivers, lb 197,000 Diameter drivers, in 79 Cylinders, dia. and strol<e, 27 by 28 Boiler pressure, lb 200 Heating surface, total, sq. 3,824 Superheating surface, sq. _8S7 dale area 70 8 Tractive effort X dia. drivers -^ equivalent surface. heating surface ~- grate area Fiiebo-^ heating surface -r- equivalent heating surface, per cent For anthracite coal. 1
. Railway mechanical engineer . L. V. T.\BLE II—Comparison of He-wy Pacific Type Locomotives Road U. S. R. A. Year built 1919 Tractive effort, lb 43,900 Total weight, lb Weight on drivers, lb 197,000 Diameter drivers, in 79 Cylinders, dia. and strol<e, 27 by 28 Boiler pressure, lb 200 Heating surface, total, sq. 3,824 Superheating surface, sq. _8S7 dale area 70 8 Tractive effort X dia. drivers -^ equivalent surface. heating surface ~- grate area Fiiebo-^ heating surface -r- equivalent heating surface, per cent For anthracite coal. 1914 44,500 308,900 201,800 80 27 by 28 205 4,035 1,154 70 1915 47,506 197,300 73 27 by 28 200 3,680 760 1916 48,800 301,500 192,200 73 !7 by 28 205 4,103 75 75 Pacific interchanging with the heavy Mikado and the lightSanta Fe and Mountain type locomotives. Both the main and side rods are of channel section, tlierod design for all of the standard locomotives being the same. -Z60%- J— Boiler for the Heavy Pacific Type Locomotive the specifications calling for either cast or rolled steel, witha cast iron bull ring and packing rings of Hunt-Spiller guniron. In both cases the cylinders and valve chambers arefitted with the Hunt-Spiller gun iron bushings. The pistonand rod of the light Pacific type are interchangeable withthose of the eight-wheel switcher, while the piston on theheavv Pacific type interchanges with that used on the heavyMikado and Mountain type locmotivcs and the light SantaFe type. The crosshead is also essentially the same as that in details with the exception of the necessary- variationin dimensions. The two Pacific t\pe locomotives are tlie onlyones having the channel section side rods, the others all beingof slab section. ^^herever the journal sizes permit, the driving boxes havebeen made interchangeable on all of the locomotives. Thelight Pacific type locomotive has main journals 11 in. indiameter by 13
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
