. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . KIG. 1. THIRD RAIL CONSTRUCTION ONTOP CONTACT. upon the diameter of the cylinders andthe boiler pressure, both fixed quantities,and it is impossible to overload the en-gine ; is this true of the electric locomo-tive ? A.—No,—as in the case of the electriclocomotive, the work done depends uponthe amount of power delivered to themotors, and as this power is practicallyunlimited due to the fact that it is sup-. ITi;, 2. THIRD RAIL CONSTRUCTION L\UNDER RUNNING. plied from an external source of la
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . KIG. 1. THIRD RAIL CONSTRUCTION ONTOP CONTACT. upon the diameter of the cylinders andthe boiler pressure, both fixed quantities,and it is impossible to overload the en-gine ; is this true of the electric locomo-tive ? A.—No,—as in the case of the electriclocomotive, the work done depends uponthe amount of power delivered to themotors, and as this power is practicallyunlimited due to the fact that it is sup-. ITi;, 2. THIRD RAIL CONSTRUCTION L\UNDER RUNNING. plied from an external source of largecapacity compared with that of the loco-motive, the electric locomotive can beoverworked, resulting in burned-up motorsand damaged electrical apparatus. Theelectric locomotive will not stall, but willcontinue to work until damaged. It istherefore very important with electricoperation to have the locomotive haul theload designed for, and not the load it iscapable of handling momentarily or forshort periods of time. (J.—From where does the electric loco-motive receive its power? .•\.—From overhead wire or wires, orfrom a third rail located adjacent to therunning rails. Q.—IIow is this power collected? A.—In the case of third rail operation,by means of third rail shoes carried onthe trucks of the locomotive, this shoe be-ing held by spring pressure against thelliird rail. In the case of the overhead wires, it iscollected by means of a sliding shoe or incases of slow speed locomotive, by a ro
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