. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . wer, and Mr. H. E. Smith,Engineer of Tests, of the Lake Shore and Michigan Southern Railway Company.* To make these tests six pairs of wheels cast by different founders wereselected. An axle with a wheel pressed on each end was placed in a lathe andthe centers were firmly pressed. The wheels were then hand-turned. Thisdone, the tread was divided into eight sections, each the same distance fromthe flat edge, and a specially constructed micrometer used to discover
. Steel rails; their history, properties, strength and manufacture, with notes on the principles of rolling stock and track design . wer, and Mr. H. E. Smith,Engineer of Tests, of the Lake Shore and Michigan Southern Railway Company.* To make these tests six pairs of wheels cast by different founders wereselected. An axle with a wheel pressed on each end was placed in a lathe andthe centers were firmly pressed. The wheels were then hand-turned. Thisdone, the tread was divided into eight sections, each the same distance fromthe flat edge, and a specially constructed micrometer used to discover anyvariations in the roundness. All the testing was done with great care andprecision. The tests are illustrated in Fig. 26. The dotted line in each diagram is acircle through that point on the tread having the smallest radius, and is assumedas the datum line. In plotting the diagram the variations from this datumline have been multiplied by five in order to emphasize the irregularity of the * Proceedings Am. Soc. for Test. Materials, 1910, Vol. X, p. 307. Unevenly Chilled and UntrueCar Wheels by Thomas D. West. 58 STEEL RAILS.
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