Canadian foundryman (1917) . eavy tare weight. Under the thirtyton class of cars, one wheel weighing625 pounds was introduced, in the year1909, for use under any car whose grossload was 112,000 lbs., and the variationin the light weight of the cars in thethirty ton class is to-day from 23,000lbs. to ,000 lbs., approximately. Inasmuch as the cars are braked at60 per cent, of their light weight it wasshown that one car of 46,000 lbs. lightweight was subjected to twice the brakepressure of other cars weighing 23,000lbs. in the same class of thirty ton carsand in the same train, and in conse-qu
Canadian foundryman (1917) . eavy tare weight. Under the thirtyton class of cars, one wheel weighing625 pounds was introduced, in the year1909, for use under any car whose grossload was 112,000 lbs., and the variationin the light weight of the cars in thethirty ton class is to-day from 23,000lbs. to ,000 lbs., approximately. Inasmuch as the cars are braked at60 per cent, of their light weight it wasshown that one car of 46,000 lbs. lightweight was subjected to twice the brakepressure of other cars weighing 23,000lbs. in the same class of thirty ton carsand in the same train, and in conse-quence many wheels were subjected toheat stresses in excess of that for whichthey were originally designed. The re-sult was that many wheels were removedon account of cracked plates, due to theexcessive heating of the wheel on ac-count of the strain in the plates, becausethe plates of the wheel were not design-ed or intended for one hundred per cent,increased duty. A cracked plate wheelshould be rare if the plates of the wheel. **1_.
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Keywords: ., boo, bookcentury1900, bookdecade1910, bookidcanfoundryman1917toro
