Ping (pinglam101)

Race #88

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Official speed 67.49 wpm (60.28 seconds elapsed during race)
Race Start January 8, 2019 8:57:37am UTC
Race Finish January 8, 2019 8:58:37am UTC
Outcome Win (1 of 5)
Accuracy 94.0%
Points 65.24
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.