R
Rick C
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On Thursday, July 4, 2019 at 12:26:52 PM UTC-4, Bill Sloman wrote:
That is the point of contention. In fact, in some cases the engine doesn't have enough weight to start up cleanly and the traction wheels spin.
Here is a cite that indicates a modification increased the pulling power of an engine because of the added "weight".
https://www.wired.com/2005/03/hybrid-locomotive-gains-traction/
Face it, you are wrong about this.
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Rick C.
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On Thursday, July 4, 2019 at 6:03:04 PM UTC+2, Rick C wrote:
On Thursday, July 4, 2019 at 11:24:26 AM UTC-4, Bill Sloman wrote:
On Thursday, July 4, 2019 at 12:07:49 PM UTC+2, DecadentLinux...@decadence.org wrote:
Bill Sloman <bill.sloman@ieee.org> wrote in
news:f34dcf90-6624-4362-89c6-c6f388d4399f@googlegroups.com:
Silly idea. Electrified railroads are standard everywhere where
the population density is higher than in the US.
electrified railroads move people. REAL locomotives move freight.
Rubbish. Really heavy duty locomotives used to be diesel-electric - electric motor are better adapted to providing the necessary torque at the wheels over the wide range of rotation rates needed.
The only economic question is whether taking the electicity generation out of the train save enough - in reduced load to be shifted - to pay for the overhead wiring along the whole lenght of the track.
Higher population densities - and thus more rail traffic along the track - makes electrification more attractive, because it is a a one-off cost, and you have to lug power generating unit along with every load you shift..
REAL locomotives are diesel electric. ALL our trains are
electric, but not on an overhead grid.
Your characterization of the 'idea' being silly, is pretty stupid,
because it is not silly, and it is not my idea. India, in fact, has
the first CNG train there is.
Does that make it clever?
So much for your population density analysis.
So much for yours. The metric is the number of people per unit area who will pay to use the train, or shift freight on it.
India may have 382 people per square kilometre - alomst twice that of Germany - but it's average per capita income is a whole lot lower.
Easier here to put a train on existing tracks that powers itself
than it is to erect overhead power feeds all over the place.
Of course it is, but you only have to put up the power feeds once, and they save money on every train trip. Lugging the diesel part of a diesel electric locomotive around costs money on every trip, and the overhead wires save that on every trip.
Not sure what you are talking about. The weight of the diesel motors is not an important factor in trains. In fact, they used to use "Bud" cars on a local line which had a motor in every car! Talk about weight inefficient. Clearly the railroad doesn't care.
The weight of the total load being shifted clearly does matter.
That is the point of contention. In fact, in some cases the engine doesn't have enough weight to start up cleanly and the traction wheels spin.
Here is a cite that indicates a modification increased the pulling power of an engine because of the added "weight".
https://www.wired.com/2005/03/hybrid-locomotive-gains-traction/
Face it, you are wrong about this.
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Rick C.
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