Unfortunately the world's richest country apparently cannot find the money to convert its most premier rail corridor to constant tension catenary in this century, as it would appear.Then COLD PRR CAT can get too tight and might snap if electric trains go faster than some speed. Suspect it is different at different locations. These problems just one more reason to have constant tension CAT .
Never understood that one, either. In the overall picture, this is relatively cheap, and should pay for itself in fairly short order.Unfortunately the world's richest country apparently cannot find the money to convert its most premier rail corridor to constant tension catenary in this century, as it would appear.
I didn't realize that Luxembourg was having such trouble upgrading it's 275 route-kilometers of track.Unfortunately the world's richest country apparently cannot find the money to convert its most premier rail corridor to constant tension catenary in this century, as it would appear.
The confusion in your mind is of your own making, so have fun with it,I didn't realize that Luxembourg was having such trouble upgrading it's 275 route-kilometers of track.
(The richest country in the world is apparently Luxembourg. The Richest Countries in the World (2017-2022) (focus-economics.com)
It's also a little humbling to see that Ireland is Number two, and the United States is only number 6, after Switzerland, Norway, and Denmark.)
Actually, I agree with your main point, of course, but per-capital GDP isn't exactly an irrelevant measure of wealth. If there are more people that need to share that large pot of total GDP and thus the per-capita is less, then the people in the country with the lower per-capital GDP won't feel as "rich" and might feel that the costs of the project aren't as "modest" as some think. This is also complicated by the fact that the per-capital GDP might not be distributed very evenly, so the majority of voters may even think that they're poor (and may really even be poor), despite the county's great total (and per-capita) wealth.The confusion in your mind is of your own making, so have fun with it,
I was talking of total GDP, not per capita GDP. I know that US is not the richest in terms of per capita GDP. But at the end of the day that is mostly a side issue since it is not clear what per capita GDP has to do with the ability to fund a relatively modest project, and has little effect on the fact that somehow we are unable to fund simple things like bringing arguably the most important rail corridor upto current level of technology.
I was wondering what were the compensation devices that were in vogue back then. The simple device of using gravity for providing constant tension had not quite come into vogue yet I suppose. And of course since then the technology for catenary has developed much more rapidly outside the US than within. In any case, at present the NEC is the one glaring large stand out within the US."...American engineers have considered compensation devices not worth the complication, a belief well-justified by the behavior of the lines which are in service without those devices." - page 580 of the 1925 Electric Railway Handbook after pages and pages on wire sag and stress.
Perhaps a new edition is due.
Good grief!! This is what I would call complicating the simple. Maybe this was the sort of stuff they were thinking about in the 1925 Electric Railway Handbook.Interestingly, the new constant tension catenary being installed in the UK is tensioned using some sort of a compensating spring device, and not using weights suspended from pulleys at the end of each wire segment.
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All of this is described in Network Rail - A Guide to Overhead Electrification (PDF).
The Brits do have a penchant for complicating things and then moaning about how expensive it all isGood grief!! This is what I would call complicating the simple.
Having been a track engineer for many years in international work, I can think several examples in their railway system. Bullhead rail is one of the first that comes to mind, but there are others.The Brits do have a penchant for complicating things and then moaning about expensive it all is