. Electric railway journal . erator used per cent morepower than the efficient operator, although to a casualobserver the only difference in car operation on the twotrips was in the starting and stopping of cars more evenlyand in a less jerky manner. As a general check on these two runs shown in part inFig. io tests were made to determine the rate of accelera-tion and the possible coasting distances resulting from theuse of from one to eight points on the controller. Thesespecial tests were made with the test car at night and read-ings were made to check the curve-drawing instrumentswhich
. Electric railway journal . erator used per cent morepower than the efficient operator, although to a casualobserver the only difference in car operation on the twotrips was in the starting and stopping of cars more evenlyand in a less jerky manner. As a general check on these two runs shown in part inFig. io tests were made to determine the rate of accelera-tion and the possible coasting distances resulting from theuse of from one to eight points on the controller. Thesespecial tests were made with the test car at night and read-ings were made to check the curve-drawing instrumentswhich were used to obtain the current curves. Fig. ii shows graphically the current values whenaccelerating to full multiple from a dead stop in variousprogressive intervals of time. These curves clearly illus-trate the excessive peaks brought about by feeding fasterthan the proper rate for the motors and their gearing. Fig. 12 shows graphically the current values and varia-tions which occur when the car is in motion and the con-. •0 ou peri uv 80 6 40 —/~ ^ 0 \ i \ i \ i \ ^ \ Controller Handle Thrown Off and Then Thrown On AgainTo Full Series Seconds breech & 7 full Multiple 5iec — -6sec. CurnenlHeld —5 •
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
