David (david_j_ncba2019)

Race #4685

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Official speed 89.46 wpm (45.47 seconds elapsed during race)
Race Start October 3, 2019 11:57:13pm UTC
Race Finish October 3, 2019 11:57:58pm UTC
Outcome Win (1 of 4)
Opponents 2. jacksmurthwaite (75.95 wpm)
Accuracy 100.0%
Points 86.47
Text #4060101 (Length: 339 characters)

A train equipped with, say, two dc motors, is started with both motors connected in series to an external resistor. As the speed picks up, the resistor is shorted out. The motors are then paralleled and connected in series with another resistor. Finally, the last resistor is shorted out, as the train reaches its nominal torque and speed.