TomTom's Windings Roads feature allows bikers to select routes with the most bends for a more exciting ride.

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With the year approaching its end, we found ourselves this week looking at endings, or at least windings down.

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However, torque then becomes a problem, requiring huge generators with heavy copper windings that may scale out in the 3-4 MW range.

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The electric current density possible with such windings is approximately 30 to 100 times greater than the values achievable with copper coils at room temperature.

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With the environmental benefits of a hybrid come environmental costs: 30 extra pounds of copper, mostly in the motor windings, and 22 pounds of nickel in the battery.

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