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  1. #261
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    Quote Originally Posted by EmanuelGoldstein View Post
    Already been demonstrated, unfortunately ... that's electric motors turning them wheels.
    And here we see real electric and weight at serious work.
    Hook your cybertruck to one of these or even a very old steam powered one.
    They are electric for a reason. Maybe that adds to the try.
    Bob

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    Just try having the super truck out pull a 110 year old 150 hp Case steam tractor.

    Tom

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    Quote Originally Posted by EmanuelGoldstein View Post
    It's an okay idea but their over the top marketspeak is enough to make you throw up

    Does make you wonder why EMD and GE didn't put more battery in their locos years ago to capture dynamic braking energy, instead of burning it off through resistors ?
    4 megawatts RIGHT NOW...is a bit hard to capture eh ?

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    Quote Originally Posted by digger doug View Post
    4 megawatts RIGHT NOW...is a bit hard to capture eh ?
    ha, no doubt...and diesel was probably 20 cents a gallon when they designed that rig

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    Quote Originally Posted by digger doug View Post
    4 megawatts RIGHT NOW...is a bit hard to capture eh ?
    Just expensive.
    Conservative approximation would be that you would need 2 MWh battery designed for rapid charging. That would be 20x 100kWh batteries like Tesla is using.
    About 10 tons of batteries
    "Years ago" the price would have been eye-watering and not economically(or ecologically) feasible.

  6. #266
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    Quote Originally Posted by gustafson View Post
    ha, no doubt...and diesel was probably 20 cents a gallon when they designed that rig
    Then it wouldn't still be made & used today now would they ?
    Fuel Efficiency - CSX.com

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  8. #267
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    Quote Originally Posted by digger doug View Post
    Then it wouldn't still be made & used today now would they ?
    Fuel Efficiency - CSX.com
    no doubt, but railroads are not generally considered 'state of the art'

    and your link talks about new design locos, not old ones like the one pictured

  9. #268
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    Quote Originally Posted by digger doug View Post
    4 megawatts RIGHT NOW...is a bit hard to capture eh ?

    You can't capture what isn't there. That has 4 traction motors. Most have 6 and can't put 4400hp to the rail and been derated to 4,000 hp. If it can't transmit 4400hp with 6 motors then it sure can't "capture" that much. At any rate 4400hp is 3.2824 Mw.
    This has been tried with lead acid batteries and flopped. The cells do not all discharge at the same rate so voltage and thus power degrade and you wind up hauling a bunch of dead cells around.
    Altoona Works BP4 - Wikipedia

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  11. #269
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    Quote Originally Posted by gustafson View Post
    no doubt, but railroads are not generally considered 'state of the art'

    and your link talks about new design locos, not old ones like the one pictured
    The old one ?

    doo you know what your looking at sir ?

  12. #270
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    Quote Originally Posted by tdmidget View Post
    At any rate 4400hp is 3.2824 Mw.
    That would be the max power they could produce but I am pretty sure the motors aren't backloaded to that extent during dynamic braking. Even if they only recaptured half the energy stored dragging the train up a hill, that'd be worth doing ...

    This has been tried with lead acid batteries and flopped. The cells do not all discharge at the same rate so voltage and thus power degrade and you wind up hauling a bunch of dead cells around.
    The submarine pictured above was lead-acid battery powered and seemed to work okay. 30 years in service, spent time in the middle of rooski war games, where you wouldn't want to be hauling around any dead cells It should be possible, since it's been done.

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    Quote Originally Posted by digger doug View Post
    The old one ?

    doo you know what your looking at sir ?
    dunno, didn't SP get bought out 25 years ago, and when did they stop using Kodachrome.....

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    Regerative braking is is nothing new in electric locomotives. Everywhere else except US and India

    Kiruna(Sweden) to Narvik(Norway) Iron ore line produces excess energy with regenerative braking. Empty iron ore train takes less power going up than the full one generates in the downhill.
    IORE has 2x5400kW electric braking power that it feeds to distribution network.

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    Quote Originally Posted by gustafson View Post
    dunno, didn't SP get bought out 25 years ago, and when did they stop using Kodachrome.....
    I don't usually like to quote wikipedia but

    "Today there are still locomotives in SP paint, including ten AC4400CWs with original SP numbers ..."

    The AC4400 is pretty new ....

    Hang on, here's another example of that same paint scheme. Notice the UP patch directly below the cab window. They don't seem to repaint locomotives after every merger and acquisition. Probably can't keep up





    MattiJ, in the US companies don't need to resort to better methods. They just pay for tax cuts. Better result for the shareholders, and much easier

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  17. #274
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    Quote Originally Posted by MattiJ View Post
    Regerative braking is is nothing new in electric locomotives. Everywhere else except US and India

    Kiruna(Sweden) to Narvik(Norway) Iron ore line produces excess energy with regenerative braking. Empty iron ore train takes less power going up than the full one generates in the downhill.
    IORE has 2x5400kW electric braking power that it feeds to distribution network.
    Only if your rail line is served with:
    1. A catenary
    2. A third rail

  18. #275
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    Quote Originally Posted by MattiJ View Post
    Regerative braking is is nothing new in electric locomotives. Everywhere else except US and India

    Kiruna(Sweden) to Narvik(Norway) Iron ore line produces excess energy with regenerative braking. Empty iron ore train takes less power going up than the full one generates in the downhill.
    IORE has 2x5400kW electric braking power that it feeds to distribution network.
    Interesting, are they diesel electric?

  19. #276
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    I bet the John Deere tractor will outpull either truck or car. your choice 400Hp or 175Hp. Not sure how many farms have 400HP power service to run the big tractor.
    Bill D.

    John Deere develops fully electric, autonomous tractor | Industrial Vehicle Technology International

    Electric John Deere tractor runs for 4 hours on a charge - Agriland.ie

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    Quote Originally Posted by EmanuelGoldstein View Post
    They say that the average Percheron / Clydesdale / Shire has about 35 - 40 hp in burst mode. Don't know how their traction compares to a wheeled vehicle, tho.

    The nicest thing about them is, they are self-replicating. You don't have to go to the bank to borrow money to buy a new one every couple of years
    The problem with the horses are that they eat every day, if they are worked or not and that is why thy are nicknamed as hay burners.

    The hay consumption rate of a horse was significant enough that it made a tractor cheap in comparison. Add to this the limited work hours and environment that the horse could work in without burning them out or killing them severely limited the total available work output.

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    They did make some steam tractors designed to burn hay. Of course sparks from the fire are a hazard in dry grass.
    Bill D

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    How did we get from EV to horses?

    To be honest I think a kid would prefer a real one although I'll admit to being impressed!

    YouTube

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    How did we get from EV to horses?

    To be honest I think a kid would prefer a real one although I'll admit to being impressed!

    YouTube


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