Shaf (shfr)

Race #30

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Official speed 47.67 wpm (85.34 seconds elapsed during race)
Race Start December 24, 2018 7:58:25am UTC
Race Finish December 24, 2018 7:59:50am UTC
Outcome No win (3 of 4)
Accuracy 96.0%
Points 46.08
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.