. Electric railway journal . andle on the grades of the Altoona Divi-sion. A lower speed of miles per hour may be ob-tained by connecting the motors on the same truck incascade, whereby the rotor windings of the two motorsare coupled together with one motors stator windingconnected to the line and the other motors stator wind- ing short-circuited. This speed will be used only aroundyards and for other protracted slow movements, sincecascade operation involves a low power factor. Inter-mediate speeds between zero and the maximum can beobtained by means of a water-rheostat control systemsim
. Electric railway journal . andle on the grades of the Altoona Divi-sion. A lower speed of miles per hour may be ob-tained by connecting the motors on the same truck incascade, whereby the rotor windings of the two motorsare coupled together with one motors stator windingconnected to the line and the other motors stator wind- ing short-circuited. This speed will be used only aroundyards and for other protracted slow movements, sincecascade operation involves a low power factor. Inter-mediate speeds between zero and the maximum can beobtained by means of a water-rheostat control systemsimilar to that in the Norfolk & Western locomotives,which permits a very close regulation of the tractiveeffort developed by the locomotive during acceleration. Two of these engines, one pushing and one pulling,will be able to haul a 3900-ton train at upthe 12-mile grade of 2 per cent from Altoona to Gallit-zin, and a 6300-ton train east bound up the 1 per centgrade from Johnstown to Gallitzin, a distance of 25. PENNSYLVANIA RAILROAD—VIEW SHOWING DETAILS OF SPRING GEAR AND MOTORS WITH HOLLOW SHAFTS FOR LEADS 1050 ELECTRIC RAILWAY JOURNAL [Vol. XLIX, No. 23 miles. The tractive effort developed at the maximumspeed is 87,200 lb. The running gear of the locomotive is quite similarin general appearance to that used for steam locomo-tives, the gear wheels being connected by side rods tothe three pairs of driving wheels on each truck. Foran electric locomotive, however, the location of the mo-tors is unprecedented, since they are placed ahead of thethree pairs of drivers, or between the drivers and theguiding-truck wheels. The spring rigging on each truckis of the three-point-suspension type, one suspensionpoint being over the pony truck and the other two overeach side frame, toward the rear. The usual equalizersare provided over each box, together with ellipticalsprings between journals and helical springs outside ofthe first and third journals. Features of the structural
Size: 2000px × 1250px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
