. American engineer and railroad journal . Fig. 19. Fig. 20. With the hollow arches just described, the amount of air ad-mitted to the fire box is limited by the areas of the ferrules,but that which is admitted is heated to a reasonably high degreeand improved combustion results, which results are known to begreatly in excess of those secured with plain arches. Tests madeshow an economy approaching 20 per cent, over similar or thesame engines without the arches. Plain arches are conceded togive an economy approximating 10 per cent, over engines with-out arches. There are many points in favor o
. American engineer and railroad journal . Fig. 19. Fig. 20. With the hollow arches just described, the amount of air ad-mitted to the fire box is limited by the areas of the ferrules,but that which is admitted is heated to a reasonably high degreeand improved combustion results, which results are known to begreatly in excess of those secured with plain arches. Tests madeshow an economy approaching 20 per cent, over similar or thesame engines without the arches. Plain arches are conceded togive an economy approximating 10 per cent, over engines with-out arches. There are many points in favor of their use; thereare strong arguments against their continuance. With arches from 10 to 20 per cent, economy is possible, andwhere the cinders are also returned to the fire box, there is anopportunity for still further savings in fuel, and not the leastof the benefits derived from any and all of these devices isthat of the elimination of smoke. Four-Cylinder Compound Locomotives in Service. M. Committee—E. D. Nelson, chairman; John Howard,
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
