. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . rom the center of the journal bearingto the position of the wheel-load whenthe rail is inclined, is considerably lesstlian it is with an upright rail. responsible for safety of train movement,but also by the higher executive oflScers. If in order to thicken the flange of achilled iron car wheel by 3/16 of an inch,it is, as Mr. Lyndon points out, onlynecessary to mount each wheel on theaxle 3/32 of an inch nearer the rail. Bythis method we would shorten the lever-arm of todays practice, which
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . rom the center of the journal bearingto the position of the wheel-load whenthe rail is inclined, is considerably lesstlian it is with an upright rail. responsible for safety of train movement,but also by the higher executive oflScers. If in order to thicken the flange of achilled iron car wheel by 3/16 of an inch,it is, as Mr. Lyndon points out, onlynecessary to mount each wheel on theaxle 3/32 of an inch nearer the rail. Bythis method we would shorten the lever-arm of todays practice, which is Sjg an upright rail, to 8 17/32 ins. This, ifit be found to be in every way practicable,would reduce the axle stress the wheel over towards the railwould reduce the axle stress 2,344 inch-pounds. As it is now with a level-arm of 85/^ins. from center of journal to wheel-on-rail position, this stress is 215,625 inch-pounds. When by the inclination of therail the lever-arm becomes 7 59/64 ins.,the axle stress sinks to 198,046 inch-pounds, or a reduction of the stress to. LEVER .^R^r of level (LEFT) and inclined R.\IL (RIGHT). The diagrams sliow an 80-lb. rail ofstandard section. In the case of the up-right rail, the distance from the center ofthe journal bearing to the position of bear-ing of the wheel on the rail is 8^ ins.,while the corresponding lever-arm in thecase of the inclined rail is 7 59/64 ins.;the difference, forty-five sixty-fourths ofan inch (45/64), being in favor of theinclined rail. With a wheel load of 25,-000 lbs. not an uncommon one nowadays,the reduction of bending moment in theaxle, with the inclined rail, as comparedwith the upright rail, is therefore 45/64in. X 25,000 lbs. =: 17,578 reduction in bending moment inaxles, where the stresses alternate everyrevolution, is surely worthy of the mostcareful .consideration, not only by themechanical men of a railroad company 17,578 inch-pounds, and if the wheel po-siti
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
