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Post by Deleted on Nov 13, 2015 12:47:03 GMT
Hi When I take photos or video on the underground sometimes I can never understand how the car numbering works I.e. with the S Stock. Do you just use the leading car of the set or is it something else? Cheers |
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Post by norbitonflyer on Nov 13, 2015 14:20:43 GMT
Hi When I take photos or video on the underground sometimes I can never understand how the car numbering works I.e. with the S Stock. Do you just use the leading car of the set or is it something else? Cheers That is the convention, but the last three digits of any car will uniquely identify the whole train . (This is also true of 1995, 1996 and 2009 stock, and the 1992 stock on the Drain). The end cars are the easiest to see, and it is their numbers which are usually quoted. (in all cases the two halves of the train are numbered with an odd/even pair, but if you know the odd number you can deduce the even one and vice versa. In theory, I believe, the two halves of the trains can be mixed and matched, but in practice this has not yet happened, so each S8 train will be of the form 21001, 22001, 23001, 24001, 24002, 23002, 22002, 21002 (up to 21115.................21116). S7s start at 21301....................21302 up to 21565...................21566, but with no odd numbered 23xxx car. Some even numbered 23xxx cars are replaced by 25xxx cars, which have deicing equipment. Thus giving either 21xxx number will identify the whole train. A similar principle applies to the 1972 and 1973 stocks, with the last two digits of all cars in a unit being the same or an odd/even pair, but trains are made up of two units and they get mixed and matched so, to identify the entire train (both units) you both end cars are necessary (and sufficient!). On the Central trains are made up of four two-car sets - each pair shares the last three digits. |
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Post by Deleted on Nov 13, 2015 16:14:01 GMT
So, in short, you quote as few numbers as are necessary to unambiguously identify the whole train. How many numbers you will need to quote varies from stock to stock (see norbitonflyer's comprehensive post for more).
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Post by Deleted on Nov 13, 2015 16:37:05 GMT
Hi When I take photos or video on the underground sometimes I can never understand how the car numbering works I.e. with the S Stock. Do you just use the leading car of the set or is it something else? Cheers That is the convention, but the last three digits of any car will uniquely identify the whole train . (This is also true of 1995, 1996 and 2009 stock, and the 1992 stock on the Drain). The end cars are the easiest to see, and it is their numbers which are usually quoted. (in all cases the two halves of the train are numbered with an odd/even pair, but if you know the odd number you can deduce the even one and vice versa. In theory, I believe, the two halves of the trains can be mixed and matched, but in practice this has not yet happened, so each S8 train will be of the form 21001, 22001, 23001, 24001, 24002, 23002, 22002, 21002 (up to 21115.................21116). S7s start at 21301....................21302 up to 21565...................21566, but with no odd numbered 23xxx car. Some even numbered 23xxx cars are replaced by 25xxx cars, which have deicing equipment. Thus giving either 21xxx number will identify the whole train. A similar principle applies to the 1972 and 1973 stocks, with the last two digits of all cars in a unit being the same or an odd/even pair, but trains are made up of two units and they get mixed and matched so, to identify the entire train (both units) you both end cars are necessary (and sufficient!). On the Central trains are made up of four two-car sets - each pair shares the last three digits. Cheers for that. |
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towerman
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Post by towerman on Nov 13, 2015 16:39:25 GMT
Yes,when I was in the tower at SMD when the trains arrived in the depot we had to fill in a yard map.We never put in the 96 prefix just 002-001 etc.
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Post by version3point1 on Nov 14, 2015 21:27:17 GMT
The car numbering system for SSR is as follows:
DM car: 21XXX
M1 car: 22XXX
M2 car: 23XXX
MS car: 24XXX
M2D car: 25XXX
8-car trains: Middle digit of 0,1
7-car trains: Middle digit of 2,3,4 or 5
When picking up a train from the depot, it's normally marked on the TAS (Train Allocation Sheet) as 21XXX-21XXX or 21XXX/XX. So if was given the information for the units of my train being 21088-21087, 21088/87, or even 21088 on its own, I'd then know what the formation of the train is / all the car numbers, based on the car numbering system above (unlike older stocks, where as norbitonflyer rightly says you need both ends of the train). But yes – there is some logic to it! Sort of!
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rincew1nd
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Post by rincew1nd on Nov 15, 2015 16:41:18 GMT
Whilst I can't remember the detail of the 09ts on the Victoria Line, I do remember that train one was formed of xx001 and xx002; if the car number is even divide it by two to get the train number, if it's odd add one then divide by two.
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Deleted
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Post by Deleted on Nov 15, 2015 17:06:04 GMT
The 09 and S8 stock use the same number scheme.
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Post by norbitonflyer on Nov 15, 2015 17:15:27 GMT
The 09 and S8 stock use the same number scheme. First digit 1 (09 stock) or 2 (S stock) Second digit, position in unit (numbering from the nearest end) Remaining digits identify the individual unit - 09s and S8s both start at 001/002, S7s start at 301/302. S7s are missing the odd-numbered 23xxx car, and deicing S stocks have a 25xxx instead of the even-numbered 23xxx car. Ice is not usually a problem on the Victoria Line! |
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