File:The Street railway journal (1896) (14738069966).jpg

Identifier: streetrailwayjo121896newy (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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Text Appearing Before Image:
FiG. 3.—WALKER MOTOR. tions are the result of long experience in rating motors,and it has been found that motors filling these specifica-tions will operate an ordinary city car with trailer with-out undue heating during the hottest weather. A street car motor is only required to take its max- Oorfa of30l-P Railway Mo-Tor C;eorR£duction=J(»-4 78 33Hh«tlsTHE WALKER MANUFACTUJriNO CO,CLEVELAND , OHIO.
Text Appearing After Image:
I. Horiionfal Force-Currcnf.It. Speed -CurreirT V. Speed -Graae. VI. Speed-Tractive Effort Curves V are for a IO-b«nchopen car, empTij Va and load-«dVb. Wei g trfs-Ta Ken as fo I-lo^vs: Body 5 600 Ibi Truck 4600Ec^uipmenr 5 ZOO .100 Passengers 15 OOP •28400 .Weighr Loaded l4.2Tons.WeighrEmptt) 7.7 . Curves V are for doubleeguipmenf! Sepr.1695 ntdl Fo rce neriofor-^i FIG 4.-CURVE SHEET FOR DIFFERENT SIZES OF MOTORS. imum load at starting, and soon drops to less than halfload and for a portion of the time is receiving no cur-rent at all. The efficiency of these motors must behigh at overloads, in order that the starting currentsshall not be excessive. It must be high at light loads, asa motor is required to run most of the time at from one-quarter to one-third of its rated capacity. On roadsw^ith many grades or where continuous heavy traffic isfound the efficiency must be uniformly high, in orderthat the minimum amount of current will be consumed.Under the great variations in the co

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