Hot answers tagged motors
The 12v train motor uses 2-pole 3-slot technology. Because of thinner, but longer wire which results in a greater resistance and will create higher voltage, but lower current the current output isn't enough to drive on-train lights. Since the resistance of on-train lights is constant this will drag down the generated voltage as well.
As you can see in the picture below the friction has to do with driving the worm wheels via regular gears while pushing the unit by hand and yes, I guess the gear teeth on the wheel axles could be damaged because of the gear ratio.
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