. Electric railway journal . permit the starting of atwelve-car train on a two per cent grade with a coeffi-cient of adhesion of only twenty per cent and acceler-ate the train at m. p. h. per second. The above gen-eral statements are tabulated below: Hauling Capacity—C, M. & St. P. 3000-Volt GearlessLocomotive Number of motors 12 One-hour rating, horse-power 3240 Continuous rating, horse-power 2760 Tractive effort, one-hour rating, pounds 46,000 Tractive effort, continuous rating, pounds 42,000 Tractive effort, 2 per cent ruling grade with 960-ton train, pounds 55,200 Coefficient of a
. Electric railway journal . permit the starting of atwelve-car train on a two per cent grade with a coeffi-cient of adhesion of only twenty per cent and acceler-ate the train at m. p. h. per second. The above gen-eral statements are tabulated below: Hauling Capacity—C, M. & St. P. 3000-Volt GearlessLocomotive Number of motors 12 One-hour rating, horse-power 3240 Continuous rating, horse-power 2760 Tractive effort, one-hour rating, pounds 46,000 Tractive effort, continuous rating, pounds 42,000 Tractive effort, 2 per cent ruling grade with 960-ton train, pounds 55,200 Coefficient of adhesion ruling grade, per cent 12 Starting tractive effort. 20 per cent coefficient of adhesion, pounds 91,600 Rate of acceleration, starting, 2 per cent ruling grade, miles per hour per second • While the manufacturing guarantees are limited to42,000 lb. tractive effort as a continuous output of thislocomotive, preliminary tests upon a sample motor built. /OO 90 23 SO -to k 70 60 Gear •/ess Z5 30 35 40 45 SO S5 60 65~•Speed- M/7e5 per /iour EFFICIENCY CURVES OF PRESENT GEARED AND FUTURE GEARLESSST. PAUL LOCOMOTIVES
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
