. The Street railway journal . imum speed and motor capacity demanded. The followingtable is made out for an accelerating and braking rate of ij4m. p. h. per second, a value sufficiently high for suburban SPEED 25 MILES PER HOUR Stops per Miie KW Maximum Speed Total HP MotorCapacity 29 25 miles 143 35 29 175 44 3 186 5i 33 207 63 37 245 79 43 3o1 100 5 395 This table affords means of very interesting number of stops per mile given is the equivalent numberof stops, and includes slow downs required for sharp curves,etc. W ith .8 of a stop per mile the energy consump
. The Street railway journal . imum speed and motor capacity demanded. The followingtable is made out for an accelerating and braking rate of ij4m. p. h. per second, a value sufficiently high for suburban SPEED 25 MILES PER HOUR Stops per Miie KW Maximum Speed Total HP MotorCapacity 29 25 miles 143 35 29 175 44 3 186 5i 33 207 63 37 245 79 43 3o1 100 5 395 This table affords means of very interesting number of stops per mile given is the equivalent numberof stops, and includes slow downs required for sharp curves,etc. W ith .8 of a stop per mile the energy consumption isgiven as 63 kw per car, while an increase of 50 per cent in thenumber of stops to per mile increases the energy consump-tion to 100-kw average. A further increase in the number ofstops and the maintenance of the same schedule speed wouldincrease the energy consumption of the car at a much greaterratio. This increase in energy for the more frequent stops canbe capitalized. The difference in energy consumption between. - Stops /my Mile -ENERGY CONSUMPTION FOR 35-TON CAR .8 stops and stops, 37 kw, corresponds to hours permile of track per car per day. Assume, i-hour headway and18-hour service, there will be thirty-six cars per day operatingover this I-mile section, consuming a total of 1 cent per kilowatt-hour this energy amounts to 5 per centinterest on $3,880. In other words, nearly $4,000 per mile oftrack could be expended to eliminate curves, which would de-crease the number of stops per mile 33 per cent. January 9, 1904.] STREET RAILWAY JOURNAL. No consideration has been given to the fact that the motorcapacity has increased over 60 per cent, that the generatingstation has increased a like amount, and the interest on thisextra capital investment should be also included in figuring upthe cost of making additional slow downs or stops. Also it hasbeen necessary to operate our car at a maximum speed of 50m. p. h., where 40 sufficed before,
Size: 1924px × 1299px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
