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| lime street control issue 28/03/2012 at 21:22 #31033 | |
jc92
3685 posts 
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liverpool lime street has lime street control, like euston as i understand the principle, each platform is split in roughly half, and if over half is occupied, then lime street control kicks in, and any signal which is set to allow another train permissively into the same platform is measured by a berth TC, before the signal will clear, to prevent overfilling a platform. ive tested this in P9 with a train measuring 189m (roughly 9 mk1 coaches) and a light loco at 19m (which should be able to get a permissive aspect). and the permissve route will not clear for the light loco, i havent yet tested this with other platform/shunt signal combinations, however i wonder if this is correct or not edit: ive now tested this with intermediate shunt signals which do clear, just leaving me with the question as to wether the running signals should be capable of displaying a call on aspect "We don't stop camborne wednesdays" Last edited: 28/03/2012 at 21:27 by jc92 Log in to reply |
| Re: lime street control issue 29/03/2012 at 08:00 #31037 | |
kbarber
1742 posts |
I think Lime Street Control can be an awful lot more sophisticated than that, it depends what the operators ask for. I don't know exactly what the real Lime Street has but it wouldn't surprise me in the least if it will let 2/3/4 car MUs in on top of each other at least until the platform is over half full, but won't let an MU in on top of a proper train. I understand Waterloo International had (has) an enormously complex set of controls in its Lime Street Control, capable of handling every possible different combination of (the proposed but never used) sleeper stock, generator loco/van sets and locos, such that every possible legitimate combination could be put together but nothing that would go overlength (so apparently the measuring track circuits in/approaching the station throat were the ultimate lineman's nightmare). Log in to reply |
| Re: lime street control issue 29/03/2012 at 08:46 #31039 | |
Peter Bennet
5402 posts
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Cowlairs (Glasgow QS) does it by axle counters and there are certain combinations on cerain platforms that cause problems- can't recall the details but something like putting 3 carriage on top of a 2 will be OK but a 2 on top of a 3 trips the system or was it that Cl37 caused problems. I have a photo of the wall-chart somewhere. Edinburgh has TC overrides (omitted from the current released Sim in error). Peter I identify as half man half biscuit - crumbs! Log in to reply |
| Re: lime street control issue 29/03/2012 at 11:44 #31045 | |
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mfcooper
707 posts |
It's basically coded as no-one has got any copies of the Control Tables for Lime Street signal box, and these tables are most likely private and not for publication. (possibly still the typewritten paperwork, tbh). Without them, all I can do is approximate. For now it works well enough, based on clear track circuits or something.
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| Re: lime street control issue 29/03/2012 at 11:58 #31049 | |
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jc92
3685 posts
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" said:For now it works well enough, based on clear track circuits or something.unless someone is looking at producing a timetable with anything but units in..... "We don't stop camborne wednesdays" Log in to reply |
| Re: lime street control issue 29/03/2012 at 18:24 #31062 | |
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kbarber
1742 posts |
Lime Street would definitely need the facility to put a loco on to a set of stock; that is what the original Lime Street Control was for when the box opened in 1947. Units are a whole new-fangled thing that didn't exist at the time (well, not at Lime St anyway).
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