. American engineer . ich together carry 76,900 lbs., making the total weight of thelocomotive 378,700 lbs., of which nearly 80 per cent, is on locomotives were ordered after considerable experiencewith articulated locomotives of the 2-6-6-2 type* of practicallythe same power, as well as with Mikado and consolidation loco-motives ranking with the largest of their type. It thus appearsthat for this service a simple locomotive of the non-articulatedtype fitted with a high degree superheater was considered prefer- ihe 2-8-2 type in comparison with this 2-10-2 type. It will beseen th
. American engineer . ich together carry 76,900 lbs., making the total weight of thelocomotive 378,700 lbs., of which nearly 80 per cent, is on locomotives were ordered after considerable experiencewith articulated locomotives of the 2-6-6-2 type* of practicallythe same power, as well as with Mikado and consolidation loco-motives ranking with the largest of their type. It thus appearsthat for this service a simple locomotive of the non-articulatedtype fitted with a high degree superheater was considered prefer- ihe 2-8-2 type in comparison with this 2-10-2 type. It will beseen that while the Mallets give a somewhat larger percentage ofweight on drivers, the new locomotives do not compare verybadly in this respect and are of course a considerable improve-ment over the Mikados. The average weight per driving axledepends on the strength of the track and bridges, and in thisrespect the Mikado on the Chesapeake & Ohio is the largest ofany locomotive shown in the table, although by no means the. Most Pow/erful Non-Articulated Locomotive: Chicago, Burlington & Quincy. able to the articulated compound designs already in use on thatroad. These include engines fitted with superheaters, reheatersand feed water heaters, as well as an earlier design, which in-cluds none of these appliances. Although the 2-10-2 type is not new, there being 160 in use onthe Santa Fe and at least one on the Pittsburgh, Shawmut & *See Ainericai: Engirtcr and Railroad Journal, May. 1910, page 171. largest weight per driving axle now in service in this arbitrarily that the maximum indicated horespower willbe delivered with a piston speed of 700 ft. per minute, which inthe case of the locomotives shown in the table varies from 22^miles per hour for the 57 in. driver to 25 miles per hour for the64 in. wheel. It will be seen that the new Burlington engineis slightly less than the Mallet on the same road, but that it ex- 231 232 AMERICAN ENGINEER. Vol. 86, No. S.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1912
