Eli5: Why subways are able to accelerate so quickly?
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Distributed traction, usually half the wheels in the trains are powered by traction motors, so almost every car is pushing the train, overcoming the slipperiness of steel wheels on steel tracks
Like cars are typically 2 wheel drive, off-roaders are 4×4, 4 driven wheels out of 4, while subway trains are typically like 32×64 or more, 32 driven wheels is a lot
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