. American engineer and railroad journal . ses of steel, the proportion of carrying capacity tolight weight can be still further increased for large capacity carswithout danger of increasing the subsequent running repair account. Second. With regard to the question of probable increased firstcost of freight cars having steel underframing, the burning ques-tion here is, Will it pay f There are so many factors governed bylocal conditions which must enter into the calculation that eachcompany must perforce figure this out for its own set of conditions. One factor, namely, the repair account shoul
. American engineer and railroad journal . ses of steel, the proportion of carrying capacity tolight weight can be still further increased for large capacity carswithout danger of increasing the subsequent running repair account. Second. With regard to the question of probable increased firstcost of freight cars having steel underframing, the burning ques-tion here is, Will it pay f There are so many factors governed bylocal conditions which must enter into the calculation that eachcompany must perforce figure this out for its own set of conditions. One factor, namely, the repair account should, however, here re-ceive passing notice. From the best information obtainable yourcommittee believes that it is very nearly correct in stating that thecharge for wheels, axles, springs, paint, chain, brake shoes, brasses,couplers and other parts that will wear out and fail as much underthe most perfect steel-framed car as under the poorest design ofwooden-framed car in the same service will constitute about 50)^ AND RAILROAD JOURNAL. 163. Fig. 1.—Standard Reference Cage for Mounting and Inspecting Wheels. per cent, of the averaee total cost of freight-car repairs, exclusiveof inspection, oiling and packing. Then the two question remain: First. Of the remaining 4yoper cent, how much can nrobablvbe saved by the use of a perfect steel underframing which wouldrequire no repairs except painting during the life of the car ? Second. Will this saving, added to the increased freight earn-ings of the car and to the increased mileage earnings when awayfrom home (due to a less number of days per annum spent on therepair track), pay the interest and depreciation on the extra firstcost of the steel car? Taking the figures given in Poors Manual, the freight earn-ings per revenue car for 1894 were aoout $ per day, and theaverage mileage earnings of cars away from home are only about15 cents per day. Where the freight-car repair work is being kept up currently, thenumber of cars on the
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