. The Street railway journal . 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 , I. Horiionfal 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
. The Street railway journal . 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 , I. Horiionfal 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 ) . Curves V are for doubleeguipmenf! ntdl Fo rce neriofor-^i FIG 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 the great variations in the co
Size: 1798px × 1390px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
