File:The Street railway journal (1901) (14572284309).jpg

Identifier: streetrailwayjo181901newy (find matches)
Title: The Street railway journal
Year: 1884 (1880s)
Authors:
Subjects: Street-railroads Electric railroads Transportation
Publisher: New York : McGraw Pub. Co.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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conditions, even if no d^iays occur, the best averagespeed that can be maintained does not much exceed 8 miles anhour, and the average speed, with the usual delays, is very muchless. The inability to operate regularly at the maximum rate of 300cars an hour may be traced to several causes, the most potent ofwhich is delay to the cars in their progress across the bridge.The delays are principally due to the following causes: I. Irregularity of speed. If the several cars were attached to acable in such a manner as to give a clear space of 102 ft. betweenthem and were moved by the cable at any speed across the bridge,the speed of the cars would be absolutely uniform with regard toeach other, and the required separating space absolutely main-tained. In practice, where each car is propelled by a separatemotor, this ideal condition cannot be maintained. If for anyreason one car is stopped, or its speed reduced, all cars behind itmust stop or their speed must be reduced accordingly to prevent
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October 26, 1901.) STREET RAILWAY JOURNAL. 649 encroachment on the stipulated clear space between them. Thiswould require that the power be cut off and the brakes be appliedsimultaneously and with the same force on all the cars following,the one delayed, which, under the conditions, is impossible. Thepractical result is that motormen who are careful not to encroachon the prescribed space will hold their cars in check, and givethemselves some leeway in which to bring their cars to a stop,if necessary, after observing the checking of speed of the car im-mediately in front. Again, when the car originally delayed re-sumes its speed, it is practically impossible for all the followingcars to apply power at the same instant and to the same degree,and the inevitable result is that, even if the cars are exactly 102ft. apart at the beginning of the starting operation, there will bea perceptible time interval between the starting of each successivecar, which will have the effect of increasing th

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