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or by a third rail or overhead wire


Batteries are cool PR, but wouldn't it be better for a train to not have to accelerate all the mass of the batteries, and just use wires overhead to deliver power?


I almost bored you with technical details I will refrain, but basically, you want your train to be able to continue if you have a third rail/overhead failure. Look up TGV-M if you want more information.


Depending on the location, it’s more environmentally impactful to run copper wires everywhere.

Batteries have a lot of advantages if you trust they won’t explode too often.


Lots of trains designed to run by overhead lines have some amount of on-board storage capacity in case power goes out on a segment of the path.


"just" run high powered wires with enough energy to move an entire train for the entire length of the track? and deal with having a coupling system to the train? obviously since it's been done it's feasible, but I think you're discounting how much work that is to build and maintain.

I'm not sure what's more resilient, if a tree falls on to the tracks breaking the electrified wire, it'd also be on the rails, stopping the train anyway, but I imagine not having an electrified wired dangling around across the country is less dangerous than having a battery in a known location with qualified engineers looking after it.

They could just be doing this for PR purposes, but I'd love to see the internal cost analysis that was done to build this vs the cost of building using a known good solution.


> “just" run high powered wires with enough energy to move an entire train for the entire length of the track?

This has been done successfully around the world since the 1880s. Looking at a map it seems like the length of the line is only a few miles, so doesn’t seem like it would be that huge of an electrification project, especially considering Germany’s rails are already 55% electrified.


The whole point of electric is to improve environmental impact.

Wasting energy by moving those batteries is contrary to that goal.


it's not like running a wire for great lengths is ecologically neutral either though, and power transmission lines have losses too.

We'd have to see some actual numbers before deciding if moving heavy batteries is better or worse than having an electrified wire.


I guess I don't see the big issue with running a wire when you already must run a much larger and more complex track.

And yes, we'd need to see numbers to be certain, but my intuition tells me that transmission losses won't come close to hauling all that weight.


Haven't you be to railroad? It is really "just" how it works for centuries.




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