. Electric railway journal . o-duced from the Electric Railway Journal for , 1918. Comparative wear of curves and tangent track isbeing studied by the committee on economics of railwaylocation of the American Railway Engineering Associa-tion. The diagram on page 150 was compiled fromrecords of a 164-mile division of a steam road andcovers rail renewals on tangent and curved track fora period of thirty-one years. The report of that com-mittee for 1919 states that the average rail wear oncurves thus indicated is increased about 100 per centover that for straight rail, for a 6-deg. curve an
. Electric railway journal . o-duced from the Electric Railway Journal for , 1918. Comparative wear of curves and tangent track isbeing studied by the committee on economics of railwaylocation of the American Railway Engineering Associa-tion. The diagram on page 150 was compiled fromrecords of a 164-mile division of a steam road andcovers rail renewals on tangent and curved track fora period of thirty-one years. The report of that com-mittee for 1919 states that the average rail wear oncurves thus indicated is increased about 100 per centover that for straight rail, for a 6-deg. curve and25 per cent for a 3-deg. curve, or approximately asthe square of the degrees of curve. The Field for Alloy Steels The use of special alloy-steels has been tried byboth steam and electric railways as a means of secur-ing greater life for rails in curves with varying resultsbut the consensus of opinion seems to be that theiruse is not generally warranted for ordinary streetservice when cost differences are taken into In certain special cases, as in subways, on elevatedroads or in other locations where the radius of thecurves is very short and where the renewal work isdifficult and of very high cost, some alloy steels may bewarranted. In general a special alloy steel can onlybe justified on a cost basis, when the life of the alloysteel is three or more times that of ordinary open-hearthsteel. An instance of justified use of manganese steelin such conditions was that of the first rail of thiskind installed in the Boston subway near the Park in 1902, where an 82-ft. radius curve of ordinarybessemer rail steel lasted only forty-four days. Man-ganese was substituted and lasted over six years, orover fifty-two times as long. The article by H. W. Roberts in the Electric Rail-v/AY .Iournal for Oct. 19, 1918, on Relative Life ofManganese and Open-Hearth Rail on Curves, describestests on very sharp-radius curves on the Chicago Ele-vated Rys. It is stated that 100-ft.
Size: 1563px × 1598px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
