. The Street railway journal . edto its highest speed, and then, with its current cut off, thelocomotive coasted on a line with known grades. By measuringthe distance and time it was possible to fix the resistance of thelocomotive itself. At a speed of about 60 km this resistanceamounted to kg (12 lbs.) per ton, whereas, at a speed of30 km the resistance was only kgs (6 lbs.) per ton. Thisshows that the coupling rods do not increase the resistance ofthe locomotive considerably, and that the resistance of thelocomotive not much more than that of an ordinary car. Fig. 24 shows two in
. The Street railway journal . edto its highest speed, and then, with its current cut off, thelocomotive coasted on a line with known grades. By measuringthe distance and time it was possible to fix the resistance of thelocomotive itself. At a speed of about 60 km this resistanceamounted to kg (12 lbs.) per ton, whereas, at a speed of30 km the resistance was only kgs (6 lbs.) per ton. Thisshows that the coupling rods do not increase the resistance ofthe locomotive considerably, and that the resistance of thelocomotive not much more than that of an ordinary car. Fig. 24 shows two interesting run-diagrams with the newlocomotives. The first of the two shows the run with a .trainof 286 tons from Cosio to Ardenno. the second run with atrain of 280 tons from Ardenno to Cosio. The diagrams alsoshow the grades of the line. The portions of the run made incascade connection are distinctly marked. From this diagram it will be clearly seen that the motors re-cuperate energy on down grades. Idle diagram is also very. FIG. 20.—MASTER CONTROLLER OETHIRD LOCOMOTIVE interesting from the point of view of showing that the trainruns at a speed of 60 km (36 miles) per hour on a grade per cent. WATT-CONSUMPTION OF THE VaLTELLINA LINEThe watt-consumption was measured by meters in the Mor-begno station ever since the beginning of the electrical must be borne in mind that these meters not only measurethe watt-consumption of the trains, but all the current sup-plied by the central station, ?. c, the losses in the primary andsecondary conductors, the losses in the transformers, the con-sumption of the lighting installation in stations, also that of themotor-dynamos for charging the accumulators used for thelighting of the motor cars and that of several motors drivingthe repair shops.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
