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Almost all modern electrics do feedback, the power electrics for the AC motors make that easier. (And it can be done most efficiently just on the power system also used by the German railways.) In fact, I believe the regular S-Bahn multiple units of the latest generation (not in Berlin) absorb a greater percentage of braking energy with regenerative braking than ICE-3 sets.

*Lunatic*, n.
One whose delusions are out of fashion.
by DoDo on Mon Dec 3rd, 2007 at 01:32:13 AM EST
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