. The Street railway journal . h train, and as the locomotive connections is added below. The weight of the locomotive com-plete is about 12^4 tons. A performance diagram of this locomotive hauling a four-coach train is given in Fig. 17, from which it will be seen that thetime taken to run a level section 2700 ft. long is 130 seconds, thecurrent being shut off 74 seconds after starting, the locomotivecoasting for seconds, and the brakes being then applied. Thewatt-hour consumption for the section is 1360. If the current iskept on until the brakes are applied the section can be run in 122s
. The Street railway journal . h train, and as the locomotive connections is added below. The weight of the locomotive com-plete is about 12^4 tons. A performance diagram of this locomotive hauling a four-coach train is given in Fig. 17, from which it will be seen that thetime taken to run a level section 2700 ft. long is 130 seconds, thecurrent being shut off 74 seconds after starting, the locomotivecoasting for seconds, and the brakes being then applied. Thewatt-hour consumption for the section is 1360. If the current iskept on until the brakes are applied the section can be run in 122seconds, the watt-hours being 1650. METHOD OF CONTROL In electric traction with separate locomotives there are con-ditions slightly different from those where motor cars are coupling up the locomotive to the train the driver cannotalways stop in the exact position to enable the coupling to be at-tached; and it is often necessary to move the locomotive througha mere fraction of an inch. Experience has shown that to avoid. FIG. 14.—SIDE AND END ELEVATION OF LOCOMOTIVE NO. 21 was designed for a four-coach train service, it was not workingunder most economical conditions. The results of the tests withthese locomotives, together with the previous tests of Nos. 3 and 12locomotives, are given in the following table in perton-mile. It will be noticed that while the energy per ton-mileis practically constant, there is an increase in the average speed: No. of Locomotive. Kilowatt-hour per Ton-Mile. Average Speed inMiles per Hour. 12 . 3 19 20 No. 20 locomotive gives the highest average speed, and it maybe mentioned here that when this locomotive was ordered theauthor was in a better position to specify the requirements thanwhen the order for No. 19 locomotive was placed. The latterlocomotive was nearing completion before the former was re-quired, and when the plans of No. 19 were prepared, the authorhad not gone so far into the q
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
