. Railway mechanical engineer . amed into the sides and hoppers, through which bars can beintroduced to loosen the coal when it lodges. Another causeof shortening their life is the heavier trains in which theyare used, resulting in greater shocks than those for which theywere originally designed. The effect of climate has quite animportant bearing on the life of steel car- as there is a notice-able difference in the rapidity of corrosion of cars used mostlyin proximity to salt water and to rivers where fogs areprevalent, and those which are kept principally in service inthe dry climate west of
. Railway mechanical engineer . amed into the sides and hoppers, through which bars can beintroduced to loosen the coal when it lodges. Another causeof shortening their life is the heavier trains in which theyare used, resulting in greater shocks than those for which theywere originally designed. The effect of climate has quite animportant bearing on the life of steel car- as there is a notice-able difference in the rapidity of corrosion of cars used mostlyin proximity to salt water and to rivers where fogs areprevalent, and those which are kept principally in service inthe dry climate west of the Missouri river. The writersobservations lead him to believe that corrosion is probably 25per cent more rapid in the vicinity of the salt waterthan in the drier climate of the interior. The nature of theloading also affects the deterioration. One road whichuses steel hopper cars almost entirely in iron ore servicereports that, as yet none of them show any effects ofdeterioration due to rust, although they are about 16 years. Fig. 8—Rusted Floor Sheet Cut from a Hopper Coal Car with aBroad Axe as Shown in Fig. 9 old. Coal having much sulphur and other impurities is moreinjurious to steel sheets than the better grades of coal, andwet ashes from cinder pits are especially active in hasteningcorrosion. DIFFICULT PROBLEMS For the first five or six years of the life of a steel car therepairs are light and it is easy to decide just what workshould be done, but after eight or ten years the floor andhopper sheets of mam- cars have become so corroded that theymust be renewed, and in some cases the sides also rust throughat the ends and bottom while the rest of the sheets are worthpreserving. After a few years more many cars become sogenerally corroded that it is doubtful whether the side sheetsare strong enough to make it advisable to rivet new bottomand hoppers to them. Then the problem is whether to applynew side sheets, if the car has already had a new bottom andhoppers; or, in
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
