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Posted: 18 Mar 2006 11:10
by Bjarni
init wrote:Also, the type of poles is significant. Low-voltage mains power is usually carried on wooden pylons, like telephone poles. These pylons are steel girders.
I have never seen wooden pylons, not even on the 1500V catenary. It's likely that some railroad used to use wooden pylons, but today wood of good quality is rather expensive and metal is not, so they are only wooden until they are replaced.
Isolation is much smaller on "low" voltage catenary, but such a detail is so small that it's less than one pixel, so we don't care
Posted: 18 Mar 2006 11:47
by Born Acorn
Celestar wrote:
2) Pylons on a single straight line will NOT be on alternating sides. I know The Patch does that, but I think it looks not good. And I've never seen it on a real railway.
3) I wish I could always place the pylons on the outside, but that will not happen quickly. I've plans for that tho.
Thats good to hear, but will the "outside" be defined by left side/rigth side driving?
Posted: 18 Mar 2006 11:51
by jwa1992
i have a problem with this electric rails. i can't configure the patch 'realistic accleration'.
who want to help me?
sorry for my bad english, but i'm dutch...
Posted: 18 Mar 2006 12:36
by ebik
Celestar wrote:
1) ebik: What revision is that? I cannot reproduce the problem.
Real life schematics
. In fact we have same mounting of wires as in sweden (picture above), I was just showing here that it is not pylons but mounting what alternates sides in real world.
I think zigzag has two reasons, one is:
hertogjan wrote:
is to prevent the pickups (pantographs) from wearing out at one spot.
And second is that in summer the cable does not go 'down' only in the middle between pylons, but it can be better kept straight by the weight balance at ends of the wire. (which is the amplitude thing that I was talking before)
Posted: 18 Mar 2006 23:05
by lucaspiller
For the ease of graphics I think it would be best to have caternaries on the opposite side to signals.
Posted: 18 Mar 2006 23:26
by MeusH
lucaspiller wrote:For the ease of graphics I think it would be best to have caternaries on the opposite side to signals.
This would also ease problem with curves. If catenary is on the same sides on curves, there will be no problem whether it is inner side or the outer side of the curve. Also, it will be graphicly cute. No more messy mismath, eh?
Anyway, here's a "commercial banner" from communistic times...
Communism
-it's soviet goverment plus electrification
Posted: 19 Mar 2006 01:31
by init
Bjarni wrote:I have never seen wooden pylons, not even on the 1500V catenary
I'm not talking about catenary here, just ordinary power lines. You seem to misunderstand the point of my post. My post was written in support of egladil's, not the other way around. I argued that the pylons on egladil's picture were steel girders, and therefore catenary supports and not mains power supports, as bobingabout seemed to think.
Posted: 21 Mar 2006 19:32
by StopRightThere
Instead two-tracked catenary like this:
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__________ __________
| | | |
| | | |
| <wires> |
| |
| |
| |
| <tracks go here> |
Maybe it would be better like this:
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___________________
<wire> |<wire>
|
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|
|
<track>|<track>
Posted: 22 Mar 2006 08:53
by bobingabout
gamezguy wrote:Instead two-tracked catenary like this:
Code: Select all
__________ __________
| | | |
| | | |
| <wires> |
| |
| |
| |
| <tracks go here> |
Maybe it would be better like this:
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___________________
<wire> |<wire>
|
|
|
|
<track>|<track>
if you look at a picture posted earlier, in real life they do this:
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__________ __________
| | | |
| | | |
| <wires> |
| |
| |
| |
| <tracks go here> |
Posted: 22 Mar 2006 12:17
by habell
bobingabout wrote:
if you look at a picture posted earlier, in real life they do this:
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__________ __________
| | | |
| | | |
| <wires> |
| |
| |
| |
| <tracks go here> |
Well, here in the Netherlands, they do it both ways. I guess it depends on the room they have.
But it's true it's mostly your lay-out.
Posted: 22 Mar 2006 12:23
by habell
I've found some other (more recent) examples
Posted: 22 Mar 2006 12:26
by Brianetta
Most modern lines have them outside the tracks, rather than between, for simple safety reasons. Maintaining high voltage catenary is dangerous enough without having to cross (and stand between) railway lines to do so.
Posted: 22 Mar 2006 12:34
by habell
Another thing, I would like to see those catenary in OTTD ouside the track.
The only catenary now available is one left and then one right. Maybe realistic with one line, but not when there are two (or more) line next to each other.
Posted: 22 Mar 2006 12:57
by richk67
habell wrote:Another thing, I would like to see those catenary in OTTD ouside the track.
The only catenary now available is one left and then one right. Maybe realistic with one line, but not when there are two (or more) line next to each other.
Many sections of the East Coast Main Line have catenary supported from a full width gantry, notably near York station. Nice and chunky
Other areas have a pole either side of the tracks, with a suspension wire between as seen in this
pic.
Posted: 22 Mar 2006 13:02
by Brianetta
habell wrote:The only catenary now available is one left and then one right. Maybe realistic with one line...
Not even. Most single line catenaries have the pylons down one side - again, for ease of maintenance. Access only has to be provided on one side of the track.
Posted: 22 Mar 2006 13:41
by ebik
Hmm. and three (and more) line caternaries?
Like
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| | | |
| |==============================================| |
| | | | | | |
| | * * * | |
| | | |
These are used mainly on stations (not usable with ottd stations), but also before and after stations where are more than two lines.
Posted: 22 Mar 2006 19:48
by Born Acorn
habell wrote:I've found some other (more recent) examples
I have reason to believe those examples aren't Heavy Rail. If you were meaning light rail, that type of catenary is common
Posted: 22 Mar 2006 19:57
by richk67
ebik wrote:Hmm. and three (and more) line caternaries?
Like
Code: Select all
| | | |
| |==============================================| |
| | | | | | |
| | * * * | |
| | | |
These are used mainly on stations (not usable with ottd stations), but also before and after stations where are more than two lines.
The East Coast Main Line section from York to Selby uses these, and thats 18 miles of countryside. Interesting to note that it doesnt cover the four tracks - there is an additional catenary on the left of the pic for the 4th track.
I remember the supports near Holgate Bridge in York were a full metal girder system, spanning about 6 tracks. I guess its so the sag was controlled when needing to pass under the bridge, and limited space for extra supports. Unfortunately I havent been able to find any views of the bridge with electrification.
Posted: 22 Mar 2006 21:26
by TrueBrain
New binaries released
Posted: 23 Mar 2006 08:13
by Ch'marr
TrueLight wrote:New binaries released
Awesome... still missing the OS/X port, though. Sorry to seem pushy