. Railway mechanical engineer . , a rough calculation indicates that auniform speed of 15 miles an hour should be maintaineddown a per cent grade with a constant cylinder pressureof 20 lb. The schedule of the te^t run down Kellysville hill,therefore, called for the maintenance of approximately 20 pressure, that is, a 10-lb. brake pipe reduction, tobe slightly raised or lowered by the manipulation of thebrake valve between lap and running positions, and lapiind application positions, as the speed of the train seemedto require. E\-EXTFUL RUN DOAVX KELLYS^^LLE HILL Three incidents
. Railway mechanical engineer . , a rough calculation indicates that auniform speed of 15 miles an hour should be maintaineddown a per cent grade with a constant cylinder pressureof 20 lb. The schedule of the te^t run down Kellysville hill,therefore, called for the maintenance of approximately 20 pressure, that is, a 10-lb. brake pipe reduction, tobe slightly raised or lowered by the manipulation of thebrake valve between lap and running positions, and lapiind application positions, as the speed of the train seemedto require. E\-EXTFUL RUN DOAVX KELLYS^^LLE HILL Three incidents interfered with the strict following out ofthis plan during the first three and one-half miles down thehill. At the first application of the brakes an unnecessarilylarge brake pipe reduction was made and held too long, withthe result that the train was stopped after having proceededabout one and one-half miles from the top of the this stop a maximum cylinder pressure of 32 lb. was •Second Division First Division. 34-0 SZS Z7S ZSO Z2S ZOO I7S /SO IBS 100 7S Profile of the Virginian Railway from Princeton, W. Va., to Sewalls Point, Va. 85 loaded cars. The uncertainty of the control of the brakesthroughout the train has made impracticable the successfuloperation of longer trains. From Kell)-sville east for about two miles the grade isslightly ascending, followed by about four miles of .8 percent descending grade. From Rich Creek this grade is fol-lowed by about 43 miles of light ascending grade, most ofwhich does not exceed .2 per cent. Succeeding tliis is an-other per cent descending grade. This one, however,does not exceed seven miles in length and offers less diffi-culty in train control than Kellysville hill. The remainderof the First division is made up of a broken light, eastbounddescending grade and offers little of interest from the stand-point of brake operation. From Princeton to Kellysville the cars were all operatedin graduated release, and 90-lb. t
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
