File:Main Line Elevated map, 1905 (14760990565).jpg

Identifier: streetrailwayjo251905newy (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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D the only notable feature isthe reduction of speed to 10 m.p.h. in passing around the Ytoward Pleasant Street. A short series application of currentis then made, after which the train coasts down the 2.48 percent and 3.85 per cent grades over the steanYrailroad tracksaround the 200-ft. radius curve shown, and thence down the5 per cent grade into Pleasant Street. In approaching thelatter station, the brakes are on for about thirty-eight seconds.This run takes little energy after Tower D has been passed,as may be seen from the current curve. At Pleasant Street the track enters the subway, northbound.From this point to Boylston Street the speed-time curve ismore or less distorted by the alignment and grade. It will beseen that the current is necessarily kept on a considerable por-tion of the time, and that a third application of the current isneeded in entering the station at Boylston Street, on account 78 STREET RAILWAY JOURNAL. (Vol. XXV. No. 2. NOIIVISOS 13»UVWAVH_ NOIIVISOS AV1100S
Text Appearing After Image:
noi±visis NOisiAoas; NOIIVISIS !NVSV31d Ol t/3 OH of a 90-ft. radius curve and a 4.5 per cent gradeencountered just south of the platform. Between Boylston and Park Streets the ac-celeration curve is especially smooth and wellbalanced. There is no significance in obtain-ing equal maximum values, other than the factthat in such cases the acceleration and brakingrates are equal, but the reader will note the closecorrespondence between the acceleration, cur-rent and speed curves here. The run betweenthese two stations presents little difficulty fromthe track layouts standpoint, but it is so shortthat very little time is left for coasting betweenthe moments of shutting off power and apply-ing the brakes. The run from Park Street to Scollay Squareis still more economical of energy consump-tion in terms of distance. Nearly one-third ofthe time of run is spent in coasting, and yet thedistance, 1440 ft., is covered in fifty-four sec-onds, which means an average speed of 18.2m. p. h.

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