. Official proceedings . er all and 9 feet 8 inches wide. The total heightabove the rail with trolleys lowered is 17 feet. The wheels are60 inches in diameter and are mounted on 8 inch axles with 6feet 4 inches between centers. The side frames of the truck areof cast steel and are spring supported in the usual manner, theweight on the two inside axles of each truck being cabs are built of sheet steel with angle iron supports and theentire cab as a whole is removable from the truck. Each axle carries a 225 h. p. single phase series motor ofthe single reduction geared type, making
. Official proceedings . er all and 9 feet 8 inches wide. The total heightabove the rail with trolleys lowered is 17 feet. The wheels are60 inches in diameter and are mounted on 8 inch axles with 6feet 4 inches between centers. The side frames of the truck areof cast steel and are spring supported in the usual manner, theweight on the two inside axles of each truck being cabs are built of sheet steel with angle iron supports and theentire cab as a whole is removable from the truck. Each axle carries a 225 h. p. single phase series motor ofthe single reduction geared type, making a total of six motorsfor the locomotive. One side of each motor is supported directlyon the axle and the other suspended by spiral springs from thelocomotive body. The motors are so arranged that forced venti-lation maybe used and increased output thus secured. The locomotive is designed for a trolley voltage of 6,600and a current of 25 cycles per second. The 6,6oo volt current is The Single Phase Electric Locomotive. 35. collected from the trolley wire by a pneumatically controlledpantagraph trolley on each half of the locomotive and is carriedthrough a suitable oil switch and circuit breaker to a transformerin each cab. These transformers reduce the voltage from 6,600to 325 for use at the motors. The trolleys may be raised or 36 Proceedings Railway Club of Pittsburgh. lowered from the cab by a suitable air valve. Forced ventilation is used with the transformers as well aswith the motors and the necessary air is supplied by suitablemotor driven blowers. Compressed air is supplied for the brakesand operation of the controlling devices by means of motordriven compressors. The locomotive is designed for slow speed freight service,this type having been chosen because the design of such a loco-motive for very slow speed service presents more difficult prob-lems than the design of a locomotive of equal capacity for highspeed conditions. This locomotive having been successfully de-si
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