. American engineer and railroad journal . per square inch. This is thevalue of the elastic limit of good steel and three times as great 108 AMERICAN ENGINEER AND RAILROAD JOURNAL. a pressure a< should be used with safety undergood conditions. NO BURNED SEAMS. All seams are submerged (Fig. 6-d), andthus are not subject to the danger of burningand leaking. The stay sheets between thechannel and arch sections serve readily ascaulking strips. LOW MAINTENANCE COST. Due to the design, and also to the absenceof staybolts and crown-bar bolts, the mainte-nance cost of the boiler should be very much
. American engineer and railroad journal . per square inch. This is thevalue of the elastic limit of good steel and three times as great 108 AMERICAN ENGINEER AND RAILROAD JOURNAL. a pressure a< should be used with safety undergood conditions. NO BURNED SEAMS. All seams are submerged (Fig. 6-d), andthus are not subject to the danger of burningand leaking. The stay sheets between thechannel and arch sections serve readily ascaulking strips. LOW MAINTENANCE COST. Due to the design, and also to the absenceof staybolts and crown-bar bolts, the mainte-nance cost of the boiler should be very muchlower than with present usual maintenance cost would be approximatelysomething over 40 per cent, less than is nowthe case. As the cost of maintenance and re-newals of fireboxes, staybolts, and fluesamount to an approximate expenditure of$2,000,000 per year on a road having 2,030locomotives, this firebox should bring about a reduction of ovei$800,000 yearly in this expense. eft ft ft eft ^* fc^^^^^^rf (^^^^^^J ^^^^^^^J ^m. Old Construction New Construction FIG. 6.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
