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| Light Engine Speeds 31/07/2014 at 10:17 #63340 | |
onlydjw
456 posts |
I'm sure I've read this somewhere, but a search under "light engine" didn't find it. From memory, the maximum speeds of light engine movements aren't the locos max speed, due to braking restrictions. (ie a 75mph loco can't travel at 75mph when on it's own). Can anyone point me in the right direction of information regarding this, or indeed explain what the situation is. Thanks. God bless, Daniel Wilson Log in to reply |
| Light Engine Speeds 31/07/2014 at 10:40 #63342 | |
lazzer
603 posts |
Do you mean section 2.2 of the SP module of the rulebook?
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| Light Engine Speeds 31/07/2014 at 10:54 #63343 | |
kaiwhara
584 posts |
From my own experience, New Zealand has no such speed restriction when operating a Light Locomotive, but having driven a few, I can vouch that they can be damn scary if you don't treat them with respect. They really do not like stopping!!!! 
Sorry guys, I am in the business of making people wait! Log in to reply |
| Light Engine Speeds 31/07/2014 at 11:00 #63344 | |
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lazzer
603 posts |
I've driven two back-to-back HST power cars on several occasions, and I've always been impressed by the power of the brake, despite only having eight axles to work on instead of the usual 40 of a full set.
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| Light Engine Speeds 31/07/2014 at 11:01 #63345 | |
Danny252
1461 posts |
" said:Do you mean section 2.2 of the SP module of the rulebook?And to quote it for those of us who are lazy (usually me!), a light engine (or light engines coupled) are restricted to 60mph for linespeeds under 90mph, and restricted to 75mph for linespeeds of 90mph or higher. However, class 67 locomotives are exempted from this (due to better braking capability?). Log in to reply |
| Light Engine Speeds 31/07/2014 at 11:10 #63346 | |
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onlydjw
456 posts |
Thanks. It does raise the question what you do with, say a 110mph class 87 where a sim has linespeeds above and below 90mph, and whether SimSig can actually handle this correctly. I can't see a light engine speed class for example?
God bless, Daniel Wilson Log in to reply |
| Light Engine Speeds 31/07/2014 at 11:13 #63347 | |
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Sacro
1171 posts |
This should be handled in the Loader for 0xxx headcodes, and then exempting any that have the CS flag ticked, I don't see a need for an LE speed class when they should by identifiable by headcode. Not sure how you'd do it for none 0xxx, maybe using the LH flag? Log in to reply |
| Light Engine Speeds 31/07/2014 at 11:27 #63349 | |
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onlydjw
456 posts |
Let's hope it is then!
God bless, Daniel Wilson Log in to reply |
| Light Engine Speeds 31/07/2014 at 11:40 #63352 | |
Peter Bennet
5357 posts 
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" said:Thanks. It does raise the question what you do with, say a 110mph class 87 where a sim has linespeeds above and below 90mph, and whether SimSig can actually handle this correctly. I can't see a light engine speed class for example?The speed class is just an indicative lable to a range of available codes which if used by the developer and ticked by the TT writer will cause the train to do whatever it's coded to do wherever its coded to do it. Peter I identify as half man half biscuit - crumbs! Log in to reply |
| Light Engine Speeds 31/07/2014 at 11:54 #63356 | |
58050
2650 posts |
Line speeds of 100mph or above light locos can travel at 75mph. Line speeds under 100mph light locos can travel at 60mph. Don't think it has changed from when I was on the footplate in the mid 1980s. Log in to reply |
| Light Engine Speeds 31/07/2014 at 11:54 #63357 | |
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onlydjw
456 posts |
" said:This should be handled in the Loader for 0xxx headcodes, and then exempting any that have the CS flag ticked, I don't see a need for an LE speed class when they should by identifiable by headcode.I didn't think it worked. I have set a 100mph loco as 0A00, and set a timetable right through a sim I'm testing (loader sim on core code 4.1.2) with a 90mph line speed, and that loco is proceeding along at 90mph through the sim. It should only be doing 75mph. Is there one of the boxes I need to tick in the TT editor, or is this a bug? God bless, Daniel Wilson Log in to reply |
| Light Engine Speeds 31/07/2014 at 11:59 #63358 | |
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lazzer
603 posts |
Except for what it's changed to in section 2.2 of the SP module, as I posted above. :whistle:
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| Light Engine Speeds 31/07/2014 at 12:01 #63359 | |
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JamesN
1574 posts
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" said:Line speeds of 100mph or above light locos can travel at 75mph.Except where Danny quoted the rule book a couple of posts above... Log in to reply |
| Light Engine Speeds 31/07/2014 at 12:03 #63360 | |
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onlydjw
456 posts |
I didn't think this worked properly. I have set a 100mph loco as 0A00, and set a timetable right through a sim I'm testing (loader sim on core code 4.1.2) with a 90mph line speed, and that loco is proceeding along at 90mph through the sim. It should only be doing 75mph. Where the line speed drops to 70mph, the light loco slows to 70mph, it should slow to 60mph. Is there one of the boxes I need to tick in the TT editor, or is this a bug? God bless, Daniel Wilson Log in to reply |
| Light Engine Speeds 31/07/2014 at 12:10 #63362 | |
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Underwood
746 posts |
" said:I didn't think this worked properly.I don't think SimSig can adjust a light engine speed to run under the linespeed. You can have it restricted for high speed lines though, I set the max train speed to 75mph max, as that's the timing load for most light engines like Class 87s, 90's or 66's (LE75 or LD75 for example) unless it's a class 60 or something, then it's 60mph. Log in to reply |
| Light Engine Speeds 31/07/2014 at 12:14 #63363 | |
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Danny252
1461 posts |
I think he was responding to this post, which says that it "should" work - now, quite whether "should" means "it is coded into the loader and should work already" or "it doesn't exist, but should be implemented in the future using the loader" is unclear! " said: This should be handled in the Loader for 0xxx headcodes, and then exempting any that have the CS flag ticked, I don't see a need for an LE speed class when they should by identifiable by headcode. Last edited: 31/07/2014 at 12:14 by Danny252 Log in to reply |
| Light Engine Speeds 31/07/2014 at 12:19 #63364 | |
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JamesN
1574 posts
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To clarify - not currently possible. I'm sure there were discussions regarding implementing this, and also the 2/3rds rule for freight trains on the southern region fairly recently (Birmingham meet?) - but I'm not sure what if anything came out of that.
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| Light Engine Speeds 31/07/2014 at 12:22 #63365 | |
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onlydjw
456 posts |
It's been on the bug board for some time by the look of it - under 7678.
God bless, Daniel Wilson Log in to reply |
| Light Engine Speeds 31/07/2014 at 13:47 #63367 | |
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Underwood
746 posts |
Oh I get it now, sorry :blush:
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| Light Engine Speeds 31/07/2014 at 16:35 #63375 | |
GeoffM
6280 posts |
This has actually been possible for some time, albeit (I only now realise) not working correctly on green aspects. Example: Driving rule -> Aspect=G; From 90 to 125 reduce to 75 absolute (don't need the rest) Driving rule -> Aspect=G; From 0 to 89 reduce to 60 absolute (don't need the rest) Interpret the other aspect speeds as appropriate (depends on the TOC/FOC policy) As for the 2/3 rule: Driving rule -> Aspect=G; From 0 to 125 reduce to 67 percent (don't need the rest) What I think would be useful is to consider multiple aspects in a single rule, whether >=, <=, or as a set rather than single choice. SimSig Boss Log in to reply The following user said thank you: onlydjw |
| Light Engine Speeds 31/07/2014 at 17:16 #63377 | |
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Jan
889 posts |
What complicates the implementation of the 2/3 rule though is that authorised "International Traffic" class 6/7 trains are
but only while travelling on certain predefined routes. Two million people attempt to use Birmingham's magnificent rail network every year, with just over a million of them managing to get further than Smethwick. Log in to reply |
| Light Engine Speeds 31/07/2014 at 17:20 #63378 | |
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GeoffM
6280 posts |
" said:What complicates the implementation of the 2/3 rule though is that authorised "International Traffic" class 6/7 trains areThere are certainly complications, not all of which can be dealt with! Where is the boundary of London defined as for the purposes of this rule, I wonder. Further to my earlier comments, the minimum speed should generally be 20mph or more otherwise 15mph linespeeds result in 9-10mph running which isn't generally the intention of the rules. SimSig Boss Log in to reply |
| Light Engine Speeds 31/07/2014 at 17:55 #63380 | |
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JamesN
1574 posts
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Geoff's mention of Driving Rules does now remind me that that was the intended way of solving matters. There ya go Dan that's how to do it!
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| Light Engine Speeds 31/07/2014 at 18:14 #63381 | |
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Jan
889 posts |
" said:There are certainly complications, not all of which can be dealt with! Where is the boundary of London defined as for the purposes of this rule, I wonder. In the Sectional Appendix (currently at page 63), so basically between the region/territory/whatever boundary near Mitre Bridge Jn and Shortlands Jn respectively Purley Oakes (sic). Two million people attempt to use Birmingham's magnificent rail network every year, with just over a million of them managing to get further than Smethwick. Log in to reply The following user said thank you: GeoffM |
| Light Engine Speeds 31/07/2014 at 20:00 #63383 | |
belly buster
368 posts |
Topic reminded of this RAIB report where reference to light loco speeds is made in clause 39 http://www.raib.gov.uk/cms_resources.cfm?file=/130916_R162013_Stafford.pdf Log in to reply |