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Post by silverfoxcc on Mar 3, 2020 0:19:56 GMT
It is funny how suddenly questions crop up in ones mind
This one occured a few moments ago
Why is there what appears to be a completely random numbering of tube stock ( not the cars in sets) but numerically
Eb 1938 stock were IIRC all 5 digit numbering with some prefixed by 0 Going by a very unsteady memory didn't some Subsurface stock also follow this
Anf then on the Piccadilly the 'latest' stock is three digit, Central in the 9xxxx range and so on
The standard tube stock all 4 digit in the 3xxx series ( my books are up in the loft ,so cannot be more specific)
It suprises me that for an organisation that were pretty particular in the alphabetical annotation of stock, along with the year of introduction. Used,to me, such a haphazard method
On the other extreme the Croydon trams follow on from the old LT numbering
Does anyone have thoughts on this
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Post by norbitonflyer on Mar 3, 2020 9:05:35 GMT
There have been four or five numbering schemes in the history of London Transport/TfL. Each had its own logic, but it tends to be obscured by trains from different eras running alongside each other.
Even before the formation of London Transport, the LER had adopted a consistent numbering system for the stock it had inherited from the MDR and the assorted Tube companies.
1xxx - Older MDR wooden bodied carriages
4xxx - MDR motor coaches
8xxx - MDR trailers
3xxx - Tube motor coaches
5xxx - Tube control trailers
7xxx - Tube trailers
When the Metropolitan Railway stock was added in 1933 it took the vacant number blocks
3-digit numbers - hauled stock
2xxx - motor coaches
6xxx - driving trailers
9xxx - trailers
Starting with the prototype 1935 stock, a new numbering scheme was introduced, using 5-digit numbers.
1935/38 tube stock
10xxx A end DMs,
11xxx D end DMs
12xxx for non-driving cars
O and P surface stock
13xxx A end DMs
14xxx for D end DMs.
Trailers had a "0" prefix - 012xxx for 1938 stock, 013xxx or 014xxx for O/P stock depending which end the "dummy" cab was - they were designed for conversion to DMs and indeed many of them were so converted to form the R stock
2xxxx series - R stock
3xxxx series - 1949 stock
4xxxx series - original numbers of the 1956 prototype stock
5xxxx series - CO/CP stock, converted from O/P stock and 40,000 added to their numbers
70xxx series - standard stock trailers converted to run with 1938 stock, renumbered from 7xxx series by inserting a zero
9xxxx series - 1938 stock modified for 9-car operation - 80,000 added to their numbers.
By 1959 there were sufficient gaps in the 4-digit number series to be able to start re-using it, tube stock starting at 1000 and surface stock at 5000. 1956 stock was, unusually, renumbered into the new series.
1xxx 1956/59/62 stock DMs
2xxx 1956/59/62 stock trailers
9xxx 1956/59/62 stock NDMs (there was still a lot of Q stock in the 3xxx and 4xxx series in 1959)
3xxx 1960/67/72/83 stock DMs (and NDMs)
4xxx 1960/67/72/83 stock trailers
5xxx A and C stock DMs
6xxx A and C stock trailers
7xxx D stock DMs
8xxx D stock NDMs
17xxx D stock trailers (there being no un-used 4-digit blocks available)
1973 stock was given 3-digit numbers as there were no vacant number blocks in the 3xxx/4xxx series large enough to accommodate them. However, there was sufficient space in that block for the much smaller fleet of 1983 stock.
The fourth scheme was used for 1992, 1995 and 1996 stock, with a reversion to 5-digit numbers. The first digit is supposed to have something to do with the stock's designation.
1992 stock - 91xxx, 92xxx, 93xxx.
1996 stock - 96xxx
1995 stock - 5xxxx
However, the Waterloo & City line's 1992 stock have kept the car numbers allocated to them by British Rail before the line was taken over by LUL in 1994, in its 6xxxx series for powered emu vehicles.
Since 2000, new stock has been numbered as follows
1xxxx 2009 stock
2xxxx S stock
3xxxx Class 378 (Overground - these are officially Network Rail numbers, but not in the usual 6xxxx or 7xxxx blocks for EMU cars of that era).
Newer TfL-owned stock (class 345 and 710) have been given six-digit car numbers (340xxx and 43xxxx respectively) fitting in to Network Rail's new numbering scheme
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Post by John Tuthill on Mar 3, 2020 12:00:16 GMT
There have been four or five numbering schemes in the history of London Transport/TfL. Each had its own logic, but it tends to be obscured by trains from different eras running alongside each other. Starting with the prototype 1935 stock, a new numbering scheme was introduced, using 5-digit numbers. 1935/38 tube stock 10xxx A end DMs, 11xxx D end DMs 12xxx for non-driving cars O and P surface stock 13xxx A end DMs 14xxx for D end DMs. Trailers had a "0" prefix - 012xxx for 1938 stock, 013xxx or 014xxx for O/P stock depending which end the "dummy" cab was - they were designed for conversion to DMs and indeed many of them were so converted to form the R stock 2xxxx series - R stock 3xxxx series - 1949 stock 4xxxx series - original numbers of the 1956 prototype stock 5xxxx series - CO/CP stock, converted from O/P stock and 40,000 added to their numbers 70xxx series - standard stock trailers converted to run with 1938 stock, renumbered from 7xxx series by inserting a zero 9xxxx series - 1938 stock modified for 9-car operation - 80,000 added to their numbers. Well done that man. I was going to post the 35/38s and the CO/CP families as an example, but you've gone above and beyond!  |
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Post by zbang on Mar 3, 2020 16:40:38 GMT
....wonders how much software will break if anyone tries to add a (unnecessary) sixth digit....
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Post by jimbo on Mar 3, 2020 19:09:13 GMT
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Post by silverfoxcc on Mar 3, 2020 19:27:40 GMT
Norbiton
I just asked!!!!
Many thanks and fully understood. Very much appreciated
Ron
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