. The street railway review . liar shape and measuring the amount of metal dis-placed by indentation in the metal tested. When subjected to thistest, and a comparison made with a steel tire of a first-class brandthat had been worn out in locomotive service, the metal of theSrhoen wheel proved to be nearly 17 per cent the harder. The followiuK analyses are those of a Schoen wheel and of thelirsl-rlass lirands taken frnin a locomotive: Schoen. Locomotive Tire. Per cent. Per cent. Carbon 72 62 Phosphorus 019 .051 Sulpluir 028 .03 Manganese 82 .91 Silicon 187 .234 In this the hishcr carbon
. The street railway review . liar shape and measuring the amount of metal dis-placed by indentation in the metal tested. When subjected to thistest, and a comparison made with a steel tire of a first-class brandthat had been worn out in locomotive service, the metal of theSrhoen wheel proved to be nearly 17 per cent the harder. The followiuK analyses are those of a Schoen wheel and of thelirsl-rlass lirands taken frnin a locomotive: Schoen. Locomotive Tire. Per cent. Per cent. Carbon 72 62 Phosphorus 019 .051 Sulpluir 028 .03 Manganese 82 .91 Silicon 187 .234 In this the hishcr carbon and manganese content would accountfor the greater liardness of the Schoen wheel. Especial attentionshouhl be directed (.. llir Idwer percentage of phosphorus, sulphurand silicim, which .-uld Id tlie value of the metal. Up tn llu- pre^ent lune, the electric railroads engaged in a purelycily service have not considered that a steel wdieel would be the bestlor their \\iirl<. The constantly repeated application of the brakes. THE FINISHEP WHEEL. has so great an intlueuce upnn the wear of wheels in this servicethat it has come to be regarded as the controlling factor, and hardchilled cast iron has been thought to be the metal best adapted toresist this peculiar wear. For one reason or another a few steel wheels have been intro-duced for special services. The results have been more than satis-factory, and in some cases something of a surprise. One manager,who has had them hi use in a combined city and suburban service,was troubled with worn flanges on account of trucks being out ofline, but found upon turning olT the wheels that, at the rate theywere wearing, they should make from 150,000 to 200,000 miles beforethey were worn out. In another case a steel-tired wheel made morethan 100,000 miles before it was worn half way to the possible a heavy traffic city road has equipped two of its lines withsteel-tired wheels, and though these have now been in constantservice
Size: 1896px × 1318px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
