. Electric traction for railway trains; a book for students, electrical and mechanical engineers, superintendents of motive power and others .. . igned with 6 poles andeach pair of motors w^as connected permanently in series. The ratingwith motors in series is 1080. (G. E. bulletin 4390 gives the rated h. p. as720.) Gearless armatures are used, spring-suspended on a quill surround-ing the axle. The field is spring-supported on the frame, and centeredaround the armature quill by means of bearings. The torque of thearmature is transmitted from radial arms on the armature shaft to thespokes in th
. Electric traction for railway trains; a book for students, electrical and mechanical engineers, superintendents of motive power and others .. . igned with 6 poles andeach pair of motors w^as connected permanently in series. The ratingwith motors in series is 1080. (G. E. bulletin 4390 gives the rated h. p. as720.) Gearless armatures are used, spring-suspended on a quill surround-ing the axle. The field is spring-supported on the frame, and centeredaround the armature quill by means of bearings. The torque of thearmature is transmitted from radial arms on the armature shaft to thespokes in the drivers, thru rubber compression blocks located at the ends 303 304 ELECTRIC TRACTION FOR RAILWAY TRAINS of the radial arms; the arrangement is desirable since it compensates forvariation in track alignment and provides a flexible connection. SeeFigures 47, 48. Tests show that the 96-ton locomotive starts an 1870-ton train fromrest against such a grade as to require a tractive force of 63,000 pounds,or 32 per cent, of the locomotive weight. The drawbars are stretched,and the train accelerated to 12 m. p. hr. without slipping the Fig. 84.—Baltimore & Ohio Railkoad Passenger Locomotive used Since 1895. The dynamometer car records of drawbar pull show that the amplitudeof vibrations is, under similar conditions, considerably less than that withthe changing crank angle of steam locomotives. In design, these 5 locomotives, built in 1895, were too fast for freightservice. It was found that the locomotive wheel base was short, andthe weight was concentrated. Operating results, for over 16 years,have been excellent. These locomotives were the first heavy railroadlocomotives in America. Their success was remarkable and was ofgreat importance historically. BALTIMORE & OHIO FREIGHT, 1903. Baltimore & Ohio Railroad, in 1903, purchased 5 additional locomo-tives for freight service at Baltimore. Each weighs 80 tons and is rated800 h. p. Two locomotives are used per train. The s
Size: 1969px × 1269px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidelec, booksubjectrailroads
