Regenerative braking for DMU's

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WatcherZero

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http://www.railwaygazette.com/nc/news/single-view/view/dmus-to-test-regenerative-braking.html

Artemis Intelligent Power, Ricardo and Bombardier Transportation are doing a joint research project to test mechanical regenerative braking through flywheels on DMU in the UK. First tests will be in the lab with a Bombardier running wheel using a Artemis hydraulic pump motor and Ricardo flywheel with a second stage if successful testing it on an existing DMU (doesnt say what class they will be testing it on). Energy saving expected is in the 10-20% range and it could give a range of options from straight fuel saving to using the power to provide an extra boost to increase performance like on Formula 1 cars, possibly giving greater hill climbing performance or faster acceleration allowing better timings to be timetabled than the original class was capable of.
 
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PaxVobiscum

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Fascinating stuff - thanks for posting.

[Weird flight of fantasy] In a "Roadrunner" cartoon scenario, Wile E. Coyote would produce a spectacularly efficient energy storage scheme, but the train would fail to take bends in the track and carry on in a straight line due to the gyroscopic effect of the flywheel. [/Weird flight of fantasy] :D
 

rail-britain

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Why did the Railway Gazette dig this up?
The contractors released details of this back in May

As I understand it Bombardier will install this into one Class 170 unit, to be introduced into new rolling stock if successful
 
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