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Freight Railroad Electrification

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Posted by Shadow the Cats owner on Tuesday, May 23, 2023 10:15 PM

Yes they forgot that little bit of programming.  However given how interconnected cars are today with the internet they could have possibly fixed the issue with a single software update over the freaking internet.  Heck my 2020 Chevy Trax and my 2019 Ford Fusion both recently upgraded their own infotainment systems and the Chevy upgraded the transmission shift programming all over the internet while we were using them both.  

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Posted by zugmann on Tuesday, May 23, 2023 3:35 PM

Shadow the Cats owner
Kia and Hyundai thought their CARS were safe from theft for years also.  Then someone figured out how to defeat the program.  Then we had the summer of fun of stolen KIA and Hyundais all over the place.  Given how common social media is sooner or later someone would figure it out post it and look out.  

No they didn't.  They were just too cheap to install immobilizers in them.  

It's been fun.  But it isn't much fun anymore.   Signing off for now. 


  

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Posted by azrail on Tuesday, May 23, 2023 1:33 PM

We don't have a big enough electrical grid nor generation capacity to charge all of the EVs that the gooberment is forcing on us..how are we going to keep the electric trains running? And solar/wind are unreliable for electric generation-neither one is available 24 hrs.

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Posted by rdamon on Tuesday, May 23, 2023 1:09 PM

Guess an aluminum extension ladder could be used to trip a breaker and stop a train.

The cat wires, are they pure Cu or a Cu alloy, or just Al?

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Posted by tree68 on Tuesday, May 23, 2023 12:15 PM

NittanyLion
Breaking into a car to steal it is trivial because the car doesn't kill you when you touch it. 

EV's may be an exception to that.  Breaking into the car, no problem.  Trying to extract some of the battery wiring may be a different story...

There's a reason firefighters are being trained about the issues there (never mind the fires).

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Posted by CSSHEGEWISCH on Tuesday, May 23, 2023 12:14 PM

In a similar vein, there are police reports every so often of some miscreant who was killed breaking into a Com Ed junction box or substation to steal copper wire.

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Posted by NittanyLion on Tuesday, May 23, 2023 12:05 PM

Breaking into a car to steal it is trivial because the car doesn't kill you when you touch it.  There's no comparison.  No one is stealing cat.  It literally cannot happen because the process of stealing it is lethal.  The only people who could steal it are the same people who could de-energize it and if you've got that sort of access, there's other things to steal that are more valuable.

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Posted by Shadow the Cats owner on Tuesday, May 23, 2023 6:56 AM

MidlandMike

Kia and Hyundai thought their CARS were safe from theft for years also.  Then someone figured out how to defeat the program.  Then we had the summer of fun of stolen KIA and Hyundais all over the place.  Given how common social media is sooner or later someone would figure it out post it and look out.  

 

 
Shadow the Cats owner
Just how are the railroads going to fight the theft of their overhead wiring in major cities. 

 

LA has lots of light rail, how much live wire has been stolen?  NY and CHI have electrified rail, and I don't remember any "cat" burglary.

 

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Posted by BaltACD on Monday, May 22, 2023 9:47 PM

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Posted by tree68 on Monday, May 22, 2023 8:38 PM

MidlandMike
 
Shadow the Cats owner
Just how are the railroads going to fight the theft of their overhead wiring in major cities. 

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Posted by MidlandMike on Monday, May 22, 2023 7:35 PM

Shadow the Cats owner
Just how are the railroads going to fight the theft of their overhead wiring in major cities. 

LA has lots of light rail, how much live wire has been stolen?  NY and CHI have electrified rail, and I don't remember any "cat" burglary.

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Posted by Shadow the Cats owner on Monday, May 22, 2023 7:22 AM

You are forgetting the biggest issue in the USA also.  We have a certain section of the population that if they see something standing around that is made of metal loves to take it and sell it for scrap metal prices.  Just how are the railroads going to fight the theft of their overhead wiring in major cities.  We all saw the footage of what they did to diesel powered trains in CA just imagine them being able to stop a train fully and loot to their hearts content.  

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Posted by Overmod on Sunday, May 21, 2023 6:15 PM

blue streak 1
Problem = Few locations with non compatible CAT.

1.  PRR 25 Hz 12.0 Kv.  Obviously this needs to be replaced with 60 Hz 12.5 Kv. No freight RR would want to buy heavier and much more expensive 25/60 Hz transformers for just a few necessary locos.  Amtrak Hell Gate line to Gate and MNRR's conversion has alrady been completed.  It will not be cheap but Amtrak will finally have to convert to 60 Hz probably with dedicated federal funds.  It will not be easy as some signal system changes.  Also all bypass inductors between tracks changed from 25 to 60 Hz.  Some stations and maintenancee facilities still powerd by 25 Hz as well.

You may remember that much of the design work to convert the NEC to 60Hz (at what I recall would be 12,500V) was done in the early to middle Seventies.  All it involved then was money, and all it involves now would be money -- NIMBYs aren't going to care about traction frequency change or replacement of a few components.

What has changed, dramatically, is the switch in preference toward constant-tension catenary, something that is long, long overdue... but not particularly compatible with the existing Gibbs & Hill infrastructure.  (In fact, the sections of the older New Haven electrification being converted on MNRR and the west end in Connecticut are actually seeing whole new towers constructed, between the existing ones, for the better system -- probably more trouble and expense than for a line without electrification in the first place.)

As I recall, the 12.5 was the highest practical voltage that could be used in the North River tunnels, and perhaps in the four tunnels east out of NYP to Sunnyside.  That is probably as tight a clearance, especially to double-deck commuter cars, as anyone wants to see -- so any switch to higher-speed equipment using, say, 25kV is not going to happen before Gateway nears completion.  

Many, many of the potential clearance issues involve full domestic doublestacks operating under 25 or 50kV new construction.  The situation won't be as extreme as the Indian examples, because we can presume well cars instead of skeleton or deck flats would be used, but it is unlikely that a great many overhead obstructions won't be cost-effective either to raise or replace to the extent corona and contact safety would require.  

In my opinion the answer to this isn't making the route safe for the required voltage end to end, and isn't providing multiple-power selectors in all the locomotives to allow something like 6600V to permit ridiculous close clearances.  The 'thing' I advocate is to adopt hybrid locomotives or consists that can operate under wire and use battery power to cross any gaps or be able to start if they become stalled -- and then build the system so there is as much overhead wire per line as possible.  

2.  Metra electric and South Shore.   This is needed for HSR to access CHICAGO unlimited.

This is an utter and complete non-issue: many of the existing HSR trains in Europe, including I believe the Atlantique double-deck stock that was only slightly modified to set the world's record, are multipower including overhead-wire DC.  Since any actual HSR to Chicago would involve new-build equipment, probably along the lines of the Avelia Liberties already bought for the NEC, it would be easy to simply use that proven technology for any last-mile operation in the Chicago area, even if limited speed due to the power infrastructure were necessary for the required distance.  While it would be fun to see METRA find the cubic dollars to do a Lackawanna-style conversion of 3000VDC lines to 11kV... I don't really see it happening on a meaningful timetable, whether or not expensive work is done to existing equipment to make it dual-power compatible.  They would certainly rewire with constant-tension cat and the appropriate wayside equipment and keep very little, if any, existing wire (probably in yards and shop tracks).

3.  Does any of the light rail around Dallas/Ft.Worth operate on some freight trackage? Clearance issues ==.   With automatic multi tap transformers readily available lower clearance can make those areas 12.5 Kv.

I can't think of any electrified lines that would ever be suitable for freight power greater than dual-mode-lite, and probably not even then.  Note that the latest line is being constructed to be run with diesel railcars, in part because of the ungodly construction expense for overhead wire, even though this means that 'circle' service to DFW requires a break of journey in Plano.

Maybe 6.25 Kv? If not enough then a battery loco will be needed.

But 6600V is perfectly adaptable for dual-mode-lite, as it is for hybrid battery or battery-tender charging.  You would not use that voltage preferentially with heavy straight electrics optimized for 25/50kV.  My guess would be that the smart third rail and restricted operating speed would be elected for any part of an electrification that involved lower than 'standard' OHLE in new construction.

Believe that Virginia Avenue CSX twin tunnels are one location needed that.

Just wire up to the portals, and run on battery the length of the tunnel.  Not rocket science, compared to anything but third rail in actual cost-effective deployment. 
Or any train could have a DPU farther away than length of clearance issue.
Problem then is that any communications issues with the DPU makes operating through the tunnel a crapshoot at best, a hazard in too much of the potential operating problem situations.  Note again that a simple battery-hybrid consist easily accommodates passing those tunnels, or the CSX access to the port of Baltimore, for no more than the base cost of dual-mode-lite power.

What is the most expensive of insttalling electrification?  IMO it is the pot holling for the caissons that support the CAT poles.  Look how long it took Amtrak for the New Haven - BOS extension.

The answer here is with the Chinese, who have designed and built the equivalent of TLMs for installing catenary infrastructure.  Admittedly the actual equipment will have to be used more rigorously on existing lines, particularly single-track lines between sidings, in terms of track occupancy while working -- but there are a number of potential ways this could be done more quickly.  Actual erection of the overhead support system can be modular and effectively very fast with specialized equipment -- which if made for re-use on national-scale electrification could have a long and lucrative service life for its high initial cost.  I suspect much of the Chinese engineering, even if it has to be backstopped here, would be easily applicable to the situations here.

Other locations it might be signal cable or in case of ex SP track Sprint telephone lines.  Unmarked utility lines or misplaced markings.

I suspect the major issue is going to be fiber-optic trunking -- much of which was installed with simple trenching and backfillalong various rights-of-way.  My advice to anyone actually undertaking this is -- pull up any underground cabling on the side where the uprights will go, and re-lay the fiber-optic trunks with modern fiber and amplifiers -- it's time to implement full CBTC on any electric-converted line, and any waysides would be used only for routing, not track occupancy or speed indication.  At least in theory, unused wire might be left in the ground rather than dug up along the line of installation (but don't say it too loud around EPA types). 
Other than EHV extra high voltage power lines, all utility crossing should be underground of the ROW in casings.  Remember when car hit power pole and dropped wires fell on Amtrak CAT.
That is sound, and of course HVDC lines would be carried in vaults under the track too.  Note that it would be possible, and perhaps advisable, to install the moral equivalent of snowsheds between adjacent cat supports, over the catenary, to prevent any wires going over the top from contacting, or even having field interference with, the traction power.  

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Posted by zugmann on Sunday, May 21, 2023 4:18 PM

BaltACD
Engine changes require additional air brake testing equivalent to building the train from scratch.

...no?

It's been fun.  But it isn't much fun anymore.   Signing off for now. 


  

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Posted by BaltACD on Sunday, May 21, 2023 3:49 PM

Before electrification can be done for the US freight carriers can be done, a standard electrical configuration will have to be agreed to among all the participating carriers.

The carriers have become accustomed to run through power with diesels, they won't give up that utility and efficiency in going electric.  Engine changes require additional air brake testing equivalent to building the train from scratch.

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Posted by blue streak 1 on Sunday, May 21, 2023 1:35 PM

Electrification is going to certainly have some problems being implemented.  First costs.  Then clearances especially in the  east. 

Problem = Few locations with non compatible CAT. 

1.  PRR 25 Hz 12.0 Kv.  Obviously this needs to be replaced with 60 Hz 12.5 Kv. No freight RR would want to buy heavier and much more expensive 25/60 Hz transformers for just a few necessary locos.  Amtrak Hell Gate line to Gate and MNRR's conversion has alrady been completed. 

It will not be cheap but Amtrak will finally have to convert to 60 Hz probably with dedicated federal funds.  It will not be easy as some signal system changes.  Also all bypass inductors between tracks changed from 25 to 60 Hz.  Some stations and maintenancee facilities still powerd by 25 Hz as well.  Most difficult will be first section needed at SSY, approachesto NYP. and NYP station. 

2.  Metra electric and South Shore.   This is needed for HSR to access CHICAGO unlimited.  As far as I know there has been no provisions to add 60 Hz to any of its rolling stock.  Can they have 60 Hz added ?  Unknown. As well the CAT would needed to be changed to whatever higher 60 Hz voltages desired.  Do not know if the present SS rebuilds and new track has higher voltage CAT installed?

3.  Does any of the light rail around Dallas /  FtWorth operate on some freight trackage?

Clearance issues ==.  

With automatic multi tap transformers readily available lower clearance can make those areas 12.5 Kv. Maybe 6.25 Kv? If not enough then a battry loco will be needed.  However 6.25 sounds like better solution except for the larger feeders and CAT contact wire needed .  Believe that Virginia Avenue CSX twin tunnels are one location needed that.  Or any train could have a DPU farther away than length of clearance issue.

What is the most expensive of insttalling electrification?  IMO it is the pot holling for the casions that support the CAT poles that holds the CAT wire.  Look how long it took Amtrak for the New Haven - BOS extension.  In that case it was mostly rock.   Other locations it might be signal cable or in case of ex SP track Sprint telephone lines.  Unmarked utility lines or misplaced markings.  Other than EHV extra high voltage power lines all utility crossing should be underground of the ROW in casings.  Remember when car hit power pole and dropped wires fell on Amtrak CAT.

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Posted by blue streak 1 on Sunday, May 21, 2023 1:35 PM

Electrification is going to certainly have some problems being implemented.  First costs.  Then clearances especially in the  east. 

Problem = Few locations with non compatible CAT. 

1.  PRR 25 Hz 12.0 Kv.  Obviously this needs to be replaced with 60 Hz 12.5 Kv. No freight RR would want to buy heavier and much more expensive 25/60 Hz transformers for just a few necessary locos.  Amtrak Hell Gate line to Gate and MNRR's conversion has alrady been completed. 

It will not be cheap but Amtrak will finally have to convert to 60 Hz probably with dedicated federal funds.  It will not be easy as some signal system changes.  Also all bypass inductors between tracks changed from 25 to 60 Hz.  Some stations and maintenancee facilities still powerd by 25 Hz as well.  Most difficult will be first section needed at SSY, approachesto NYP. and NYP station. 

2.  Metra electric and South Shore.   This is needed for HSR to access CHICAGO unlimited.  As far as I know there has been no provisions to add 60 Hz to any of its rolling stock.  Can they have 60 Hz added ?  Unknown. As well the CAT would needed to be changed to whatever higher 60 Hz voltages desired.  Do not know if the present SS rebuilds and new track has higher voltage CAT installed?

3.  Does any of the light rail around Dallas /  FtWorth operate on some freight trackage?

Clearance issues.  

With automatic multi tap transformers readily available lower clearance can make those areas 12.5 Kv. Maybe 6.25 Kv? If not enough then a battry loco will be needed.  However 6.25 sounds like better solution except for the larger feeders and CAT contact wire needed .  Believe that Virginia Avenue CSX twin tunnels are one location needed that.  Or any train could have a DPU farther away than length of clearance issue.

What is the most expensive of insttalling electrification?  IMO it is the pot holling for the casions that support the CAT poles that holds the CAT wire.  Look how long it took Amtrak for the New Haven - BOS extension.  In that case it was mostly rock.   Other locations it might be signal cable or in case of ex SP track Sprint telephone lines.  Unmarked utility lines or misplaced markings.  Other than EHV extra high voltage power lines all utility crossing should be underground of the ROW in casings.  Remember when car hit power pole and dropped wires fell on Amtrak CAT.

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Posted by SD60MAC9500 on Sunday, May 21, 2023 9:21 AM

Psychot

 

 
SD60MAC9500

 

 
charlie hebdo

 

 
Backshop

 

 
charlie hebdo

It's amazing how oppositional folks are on here to electrification of major trunk lines. It's really not such a big deal. Most other industrialized nations seem to have overcome the difficulties mentioned here.  I suspect most here have never spent much time in areas that have such services. As to noise, definitely quieter.

 

 

 

Most are government run, which means that money is less of a problem. Their runs are also much shorter than ours.  LA-CHI is huge compared to anything in Europe.

 

 

 

 

I suggest that the network of lines in Europe or Japan is very dense. Majority of lines in Germany and France, Italy, Benelux are electrified. The infreastructure is state owned; operators are privatized. We should do the same for efficiency 

 

 

 

We should do the same for efficiency? Both are lacking and specifically looking at Europe's freight rail is horrible compared to the US due to open access. If you're not familiar with European freight rail it would be wise to understand a few things about it.

Barges and road dominate freight moves in Europe. The former being due to good water infrastructure. Road has been eroding rail's share of freight in Europe for years. One it's a very high cost system due to many short(trains are typically limited to 750M[2,460'])low axle load freight trains competing with dense passenger services and other freight operators on limited slot availbilty.

A major obstacle that Europe will never if ever be able to overcome is lacking the ability to double-stack containers. Also the obsolete screw and link coupler still being used which severly restricts train tonnage due to the couplers severly low buff and draft rating..

There's no uniformtiy across Europe when it comes to voltage for OHL, axle loads, and even gauge varies. I always find it funny when people advocate for us to adopt Europes poor model for freight. When if it was so sucessful it would be adopted on a massive scale yet we aren't seeing that. If anything more countries are adopting and have adopted our style of railroading. Just to name a few; Russia, China, Australia, Brazil, Saudi Arabia, UAE, and India..

 

To the point of the post. I like electrificaton however we don't need it for freight. Clearance will be an issue for OHL just the scale alone that would be needed to rasie overpasses and undercut tunnels. We also don't have a dense passenger network that would get more of a benefit from OHL than freight. 

Both OHL and DEL have pros and cons. One isn't better than the other. They suit how a network is setup and operates. DEL's will serve us just fine going forward. 

 

 

 

It seems like you're going off on two different tangents here. Much of what you say about European railroading is correct, but it has nothing to do with electrification. You cite Russia and China as countries that are adopting our methods of railroading, but Russia and China, which both have enormous rail networks, are 50% and 70% electrified respectively.

 

I mention electrification due to the iconsistency across Europe amongst other physical plant aspects noted in my previous comment. Of course method of motive power is not why the model is lacking. Even with China and Russia being mostly electrified they didn't adopt Europes operating model.

Rahhhhhhhhh!!!!
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Posted by Psychot on Saturday, May 20, 2023 11:37 PM

SD60MAC9500

 

 
charlie hebdo

 

 
Backshop

 

 
charlie hebdo

It's amazing how oppositional folks are on here to electrification of major trunk lines. It's really not such a big deal. Most other industrialized nations seem to have overcome the difficulties mentioned here.  I suspect most here have never spent much time in areas that have such services. As to noise, definitely quieter.

 

 

 

Most are government run, which means that money is less of a problem. Their runs are also much shorter than ours.  LA-CHI is huge compared to anything in Europe.

 

 

 

 

I suggest that the network of lines in Europe or Japan is very dense. Majority of lines in Germany and France, Italy, Benelux are electrified. The infreastructure is state owned; operators are privatized. We should do the same for efficiency 

 

 

 

We should do the same for efficiency? Both are lacking and specifically looking at Europe's freight rail is horrible compared to the US due to open access. If you're not familiar with European freight rail it would be wise to understand a few things about it.

Barges and road dominate freight moves in Europe. The former being due to good water infrastructure. Road has been eroding rail's share of freight in Europe for years. One it's a very high cost system due to many short(trains are typically limited to 750M[2,460'])low axle load freight trains competing with dense passenger services and other freight operators on limited slot availbilty.

A major obstacle that Europe will never if ever be able to overcome is lacking the ability to double-stack containers. Also the obsolete screw and link coupler still being used which severly restricts train tonnage due to the couplers severly low buff and draft rating..

There's no uniformtiy across Europe when it comes to voltage for OHL, axle loads, and even gauge varies. I always find it funny when people advocate for us to adopt Europes poor model for freight. When if it was so sucessful it would be adopted on a massive scale yet we aren't seeing that. If anything more countries are adopting and have adopted our style of railroading. Just to name a few; Russia, China, Australia, Brazil, Saudi Arabia, UAE, and India..

 

To the point of the post. I like electrificaton however we don't need it for freight. Clearance will be an issue for OHL just the scale alone that would be needed to rasie overpasses and undercut tunnels. We also don't have a dense passenger network that would get more of a benefit from OHL than freight. 

Both OHL and DEL have pros and cons. One isn't better than the other. They suit how a network is setup and operates. DEL's will serve us just fine going forward. 

 

It seems like you're going off on two different tangents here. Much of what you say about European railroading is correct, but it has nothing to do with electrification. You cite Russia and China as countries that are adopting our methods of railroading, but Russia and China, which both have enormous rail networks, are 50% and 70% electrified respectively.

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Posted by SD60MAC9500 on Friday, May 19, 2023 8:38 PM

charlie hebdo

 

 
Backshop

 

 
charlie hebdo

It's amazing how oppositional folks are on here to electrification of major trunk lines. It's really not such a big deal. Most other industrialized nations seem to have overcome the difficulties mentioned here.  I suspect most here have never spent much time in areas that have such services. As to noise, definitely quieter.

 

 

 

Most are government run, which means that money is less of a problem. Their runs are also much shorter than ours.  LA-CHI is huge compared to anything in Europe.

 

 

 

 

I suggest that the network of lines in Europe or Japan is very dense. Majority of lines in Germany and France, Italy, Benelux are electrified. The infreastructure is state owned; operators are privatized. We should do the same for efficiency 

 

We should do the same for efficiency? Both are lacking and specifically looking at Europe's freight rail is horrible compared to the US due to open access. If you're not familiar with European freight rail it would be wise to understand a few things about it.

Barges and road dominate freight moves in Europe. The former being due to good water infrastructure. Road has been eroding rail's share of freight in Europe for years. One it's a very high cost system due to many short(trains are typically limited to 750M[2,460'])low axle load freight trains competing with dense passenger services and other freight operators on limited slot availbilty.

A major obstacle that Europe will never if ever be able to overcome is lacking the ability to double-stack containers. Also the obsolete screw and link coupler still being used which severly restricts train tonnage due to the couplers severly low buff and draft rating. There's no uniformity across Europe when it comes to voltage for OHL, axle loads, and even gauge varies. 

I always find it funny when people advocate for us to adopt Europes poor model for freight. When if it was so sucessful it would be adopted on a massive scale yet we aren't seeing that. If anything more countries are adopting and have adopted our style of railroading. Just to name a few; Russia, China, Australia, Brazil, Saudi Arabia, UAE, and India..

 

To the point of the post. I like electrificaton however we don't need it for freight. Clearance will be an issue for OHL just the scale alone that would be needed to rasie overpasses and undercut tunnels. We also don't have a dense passenger network that would get more of a benefit from OHL than freight. 

Both OHL and DEL have pros and cons. One isn't better than the other. They suit how a network is setup and operates. DEL's will serve us just fine going forward. 

Rahhhhhhhhh!!!!
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Posted by n012944 on Friday, May 19, 2023 4:06 PM

charlie hebdo

 

 
n012944

 

 
charlie hebdo

 

 

The cash may be there but it does not appear to be maintaining the plant very well. 

 

 

 

The are maintaining the plant just fine.  Do you have any first hand knowledge from your railroading experience to back up your statement?

 

 

 

 

 

I observe: watch and listen. 

As the lyric says, "You don't need a weatherman to know which way the wind blows."

Do you think the only people allowed to comment on railroads on here are railroaders?  Are you a railroad employee?  If so, what qualifies you?

 

 

So no, you don't. Got it.

 

Do I think only railroaders should comment?  Of course not.  Do I think that railroaders have a bit more knowledge of what is going on than someone who "observes" from afar?  You bet.

 

What qualified me as a railroader to make the observation?  20 some years of experience.  I know how much track time MOW or signals are asking for, and if they are getting it.  I know how long temporary speed restrictions are put out before being repaired.  I know how often crews report rough track, or have engine failures.  I know how often track lights appear, or switches fail.  If you were a railroader with knowledge, I would not have to explain that to you.  

 

I know things that simply "watching and listening" from afar does not tell you.  As seems to be your thing these days, you are letting your ideology get in the way of the facts.

An "expensive model collector"

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Posted by charlie hebdo on Friday, May 19, 2023 12:42 PM

n012944

 

 
charlie hebdo

 

 

The cash may be there but it does not appear to be maintaining the plant very well. 

 

 

 

The are maintaining the plant just fine.  Do you have any first hand knowledge from your railroading experience to back up your statement?

 

 

 

I observe: watch and listen. 

As the lyric says, "You don't need a weatherman to know which way the wind blows."

Do you think the only people allowed to comment on railroads on here are railroaders?  Are you a railroad employee?  If so, what qualifies you?

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Posted by n012944 on Thursday, May 18, 2023 1:53 PM

charlie hebdo

 

 

The cash may be there but it does not appear to be maintaining the plant very well. 

 

The are maintaining the plant just fine.  Do you have any first hand knowledge from your railroading experience to back up your statement?

 

 

An "expensive model collector"

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Posted by CSSHEGEWISCH on Thursday, May 18, 2023 1:52 PM

It looks good for re-charging batteries quickly on streetcars or light rail and battery buses but I can't see it as very practical for rail applications.  It seems like a rather expensive way of eliminating overhead wires.

The daily commute is part of everyday life but I get two rides a day out of it. Paul
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Posted by rdamon on Thursday, May 18, 2023 1:03 PM
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Posted by Overmod on Thursday, May 18, 2023 12:22 PM

"Smart third rail" is a variant of the GE stud-contact system described in Burch's "Electric Traction for Railway Trains" (1911).  The basic idea (now) is to provide insulated sections of DC supply, with a smooth overall contact face, and return the usual way to the running rails, so that only when the locomotive pickup completely covers a given segment is heavy current supplied to it.  The pickup bridges several sections, so that a very large contact area exists at any one time but there is no 'make' or 'break' with arcing as the shoe encounters and leaves a new segment.

Manufacturers claim that it is relatively easy to make modular sections including the switching electronics, so most of the implementation is laying the third rail and connecting it to periodic DC supply (probably rectified from 60Hz grid power in the United States, but in intermittent OHLE from the catenary traction supply.

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Posted by CSSHEGEWISCH on Thursday, May 18, 2023 10:12 AM

MJ4562

Why would catenary (Sp?) be needed? Couldn't the power lines be run between the rails and have the pickup points be located under the locomotive?  Seems like it would solve a lot of problems with clearance and structure maintenance.  Would just need government support protecting railroads against trespasser lawsuits which is a very reasonable tradeoff.  

 
Sounds like a third-rail arrangement with the third rail down the center (like Lionel) instead of off to the side like current practice.  Such an arrangement has been limited to relatively low voltages (1200 volts or less) for a variety of reasons.
The daily commute is part of everyday life but I get two rides a day out of it. Paul
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Posted by MJ4562 on Thursday, May 18, 2023 9:10 AM

Why would catenary (Sp?) be needed? Couldn't the power lines be run between the rails and have the pickup points be located under the locomotive?  Seems like it would solve a lot of problems with clearance and structure maintenance.  Would just need government support protecting railroads against trespasser lawsuits which is a very reasonable tradeoff.  

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Posted by oltmannd on Sunday, May 7, 2023 3:18 PM

Erik_Mag

The definition of LCOE used in the link you gave did not seem to include the cost of energy storage, increased transmission capacity or back up generation needed for a high penetration of renewable energy on the grid. As such it doesn't give a realistic cost comparison. If the cost of wind and solar really was cheaper, then why are we still subsidizing new construction?

For a thorough discussion of the issues of renewable energy I would recommend the series of articles written by Russell Schussler (AKA "Planning Engineer") that have appeared on Judith Curry's Climate Etc. website. Russell was the planning engineer for a large electric power cooperative, so he wasn't driven by maximizing profits.

 

 

Excellent.  Thanks.  I will check them out.  

-Don (Random stuff, mostly about trains - what else? http://blerfblog.blogspot.com/

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Posted by oltmannd on Sunday, May 7, 2023 3:17 PM

charlie hebdo
The cash may be there but it does not appear to be maintaining the plant very well.

I completely disagree.  There is no data that suggests deferred maintenance. 

 

-Don (Random stuff, mostly about trains - what else? http://blerfblog.blogspot.com/

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