. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . er, giving the entire load an im-pulse in (ho direction opposite to that im-parted by the centrifugal action, will causethe wheel which now has the flange rid-ing on top of the rail, to take an outwardcourse and consequently result in derailment. This is borne out by a careful study oftender derailments. In nearly allof curve derailments it will be found thatthe truck left the rail on the inside ofthe curve, or the tangent immediately fol-lowing the curve, while on straight trackderailments w
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . er, giving the entire load an im-pulse in (ho direction opposite to that im-parted by the centrifugal action, will causethe wheel which now has the flange rid-ing on top of the rail, to take an outwardcourse and consequently result in derailment. This is borne out by a careful study oftender derailments. In nearly allof curve derailments it will be found thatthe truck left the rail on the inside ofthe curve, or the tangent immediately fol-lowing the curve, while on straight trackderailments where kinetic energyobtains, the wheel will drop off outsideof the rail opposite the low spot whichfirst caused the rocking. In order to trace the effects of therolling or tilting of the tender and itseffect on the truck more readily, we callattention to Fig. 2, which illustrates thiswithout the intervention of springs, archbars, etc. When the tender enters a curve at speedor strikes a low place in one side of thetrack on straight line, so as to cause arocking of the tender, the major portion ->. FIG. 2. SKELETON DIAGRAM OF TRUCK. of the weight is momentarily transferredfrom the center to the side bearing. InFig. 2 we assume that the pitch of thetender was toward the right. \\re there-fore have a redistribution of the weightoriginally all carried by the center bear-ing (a) so that side bearing (b) will nowtake a part of it. To that part of theweight transferred to the side bearing,however, we must add the speed or forceat which it was transferred, and wouldtherefore be equal at the journal (c), if delivered direct, to, W V- 2gR , but as the other end of the lever rests on the jour-nal (d) a part of this force is necessarilytransmitted to that point, the amount beinggoverned by the location of the sidebearing in relation to the spring saddlesE and K. It is a downward push calledC, and exerted at the end of the axle atthe point marked C and it would be ex-pressed thus. wv* X (H
Size: 1670px × 1497px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
