Quote:
Originally Posted by Sludgy
Well, not quite since the 1940's....... Diesel electric locomotives don't store energy like a hybrid does. There were no traction batteries in old diesel electric locomotives.
Railroad regenerative braking has been around a long time on electric trains that fed power back to the power grid when braking.
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True -- the batteries again seem to be a crucial component as "Dynamic Braking" turns the traction motors into generators. The energy in "Dynamic" mode is fed into huge resistors and wasted into spent heat in the Diesel-Electric variety.
Electric trains like the Amtrak Acela in the Northeast Corridor take nearly all initial braking action and feed it back into the power grid
(it still needs air brakes at each cars wheels to slow it down -- especially at speeds greater than 100 mph)
RH77
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