(delirious)

Race #6960

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Official speed 151.72 wpm (26.81 seconds elapsed during race)
Race Start November 26, 2020 6:41:21pm UTC
Race Finish November 26, 2020 6:41:48pm UTC
Outcome No win (1 of 1)
Accuracy 100.0%
Points 146.67
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.