|
Train-numbers on the LU
|
Train-numbers on the LU
) gurgled happily, sounding much like they
were saying : Binary Coded Decimal is used a lot with the programme machines and the various remote control of the IMRs etc. and describers. In BCD the decimal number is represented by the digits 0 and 1. The number 4 is represented by 100, 5-101, 6-110, 7-111, 8-1000, 16-10000 Umm, not quite. In normal Binary, 16 is 10000, but in BCD each decimal digit is coded separately in four-bit Binary, so 16 would be 0001 0110 - which is why it's called Binary Coded Decimal. Note - I have no idea about whether BCD or normal Binary was used... |
Train-numbers on the LU
|
Train-numbers on the LU
JRS: In article , seen in
news:uk.transport.london, Peter Smyth posted at Sat, 21 Feb 2004 00:00:10 :- "Thomas Crame" wrote in message . com... The circle and H&C have a shared number series, I think. The picc numbers were in the following series (in 1999): 250 - 257, 260 Cockfosters to Rayners Lane 261 - 267, 270 - 272 Cockfosters to Uxbridge 273 Spare at Acton Town (midday) 274 - 277 Northfields Midday Stablers 300 - 307, 310 - 317, 320 - 327, 330 - 337, 340 - 343 Cockfosters to Heathrow 347 Acton Town Overnight stabler 351 - 357, 360 - 366 Arnos Grove to Northfields 371 - 373 Cockfosters Midday Stablers Is there a reason why the don't use numbers ending in 8 or 9? Trains, as you know, are made up of carriages. Generally, these have a bogie at each end, two axles on each bogie, and two wheels on each axle - i.e. eight wheels in all. That is why they count in octal. -- © John Stockton, Surrey, UK. Turnpike v4.00 MIME. © Web URL:http://www.merlyn.demon.co.uk/ - w. FAQish topics, links, acronyms PAS EXE etc : URL:http://www.merlyn.demon.co.uk/programs/ - see 00index.htm Dates - miscdate.htm moredate.htm js-dates.htm pas-time.htm critdate.htm etc. |
Train-numbers on the LU
In article ,
(Thomas Crame) wrote: wrote in message ... In article , (Peter Smyth) wrote: "Thomas Crame" wrote in message om... The circle and H&C have a shared number series, I think. The picc numbers were in the following series (in 1999): 250 - 257, 260 Cockfosters to Rayners Lane 261 - 267, 270 - 272 Cockfosters to Uxbridge 273 Spare at Acton Town (midday) 274 - 277 Northfields Midday Stablers 300 - 307, 310 - 317, 320 - 327, 330 - 337, 340 - 343 Cockfosters to Heathrow 347 Acton Town Overnight stabler 351 - 357, 360 - 366 Arnos Grove to Northfields 371 - 373 Cockfosters Midday Stablers Is there a reason why the don't use numbers ending in 8 or 9? Peter Smyth I think this started on the Northern Line, with the introduction of programme machine working in the 1950s, and other lines followed suit. On the programme machine rolls, the information for that train is stored in a row of punched holes. Binary Coded Decimal is used a lot with the programme machines and the various remote control of the IMRs etc. and describers. In BCD the decimal number is represented by the digits 0 and 1. The number 4 is represented by 100, 5-101, 6-110, 7-111, 8-1000, 16-10000 and so on. This means an extra wire etc. for each extra digit. I suspect that this is the reason. I have the info. on it somewhere, but not to hand. The dutys (on the Northern Line anyway) also do not use 8 or 9. I can't remember when it changed. It was a long while ago, but mot at the same time as the programme machine introduction. Roger The programme machines use octal numbering, which is why they don't use 8s or 9s. It's also impossible to have a train number beginning with a number higher than 3 on a programme machine signalled line. A few train numbers you won't see: 375 - This is used as the "Start of service" by a programme machine. 376 - Used for "End of service" 377 - Indicates the programme machine roll has come off the carrier, as all contact fingers are made. I stand corrected, thanks for the info. Roger |
Train-numbers on the LU
Hmm, I've seen some pictures of Amersham trains (recent pics) with 401 and 402....... Nope it has changed "recently" |
Train-numbers on the LU
Peter Smyth wrote:
"Thomas Crame" wrote in message om... The circle and H&C have a shared number series, I think. 201-207 Circle Outer rail 211-217 Circle Inner rail 221-24? H&C The picc numbers were in the following series (in 1999): 250 - 257, 260 Cockfosters to Rayners Lane 261 - 267, 270 - 272 Cockfosters to Uxbridge 273 Spare at Acton Town (midday) 274 - 277 Northfields Midday Stablers 300 - 307, 310 - 317, 320 - 327, 330 - 337, 340 - 343 Cockfosters to Heathrow 347 Acton Town Overnight stabler 351 - 357, 360 - 366 Arnos Grove to Northfields 371 - 373 Cockfosters Midday Stablers Is there a reason why the don't use numbers ending in 8 or 9? Peter Smyth -- Lawrence Myers Remove numbers,if present, from address to reply. |
Train-numbers on the LU
Thomas Crame wrote:
Lars Elmvang wrote in message .. . Hi all I am trying to find out which numbers go where. So far I have this list, based on some lines: Bakerloo: Possibly 2xx but not sure Central: Don't know Circle: 201-214? District: 0xx (D-stock-trains) but what about the Wimbledon-Edgware Road services? 061-07? Wimbledon - Edgware Rd 151-152 (I think) Olympia- H St Ken. East London: 171-176 Hammersmith & City: Don't know (unless it is 2xx above 214) Jubilee: 3xx Metropolitan: 4xx Northern: 0xx Piccadilly: 3xx Victoria: 2xx Waterloo & City: 201-204 Specials and engineering trains 7xx How far "off-track" am I? And can anyone expand the list? For instance with service-specific numbers (ie. Olympia for District, Uxbrigde/Ruislip/Rayners Lane for Piccadilly, Mill Hill East/High Barnet/Edgware/City/Charing Cross for Northern and so on and so forth...) Thanks in advance! Bakerloo are 200 to somewhere in the 240s. The numbers sometimes relate to the stabling arrangements, for example Bakerloo 241 is the London Road midday stabler. The circle and H&C have a shared number series, I think. The picc numbers were in the following series (in 1999): 250 - 257, 260 Cockfosters to Rayners Lane 261 - 267, 270 - 272 Cockfosters to Uxbridge 273 Spare at Acton Town (midday) 274 - 277 Northfields Midday Stablers 300 - 307, 310 - 317, 320 - 327, 330 - 337, 340 - 343 Cockfosters to Heathrow 347 Acton Town Overnight stabler 351 - 357, 360 - 366 Arnos Grove to Northfields 371 - 373 Cockfosters Midday Stablers When running an emergency timetable the picc runs Cockfosters to Heathrow (400 series) and Acton to Rayners Lane (500 series). The vic emergency numbering is in the 000s, and I think the district emergency series is in the 300s. I can't help with the others; I've never seen the bakerloo run an emergency timetable and don't remember the central's series. -- Lawrence Myers Remove numbers,if present, from address to reply. |
Train-numbers on the LU
"Roger the cabin boy" writes...
Nope it has changed "recently" Presumably when they increased the frequency of the Fast Amersham service? D. |
| All times are GMT. The time now is 09:59 PM. |
Powered by vBulletin®
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2006 LondonBanter.co.uk