s stock

London Underground S Stock
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This article is about upcoming London Underground rolling stock. For the 1930s stock, see London Underground S Stock (ex-Metropolitan Railway).
S Stock

Manufacturer
Bombardier Transportation
In Service
from 2010
Lines Served
MetropolitanCircleHammersmith & CityDistrict
Width
2.92 m
Maximum Speed
100 km/h (62 mph)(limited)
Stock Type
Subsurface
London Transport Portal

Interior of a mock-up of the S Stock carriage
The S Stock is a class of sub-surface train currently under construction by Bombardier for the London Underground to replace 177 existing trains on the Metropolitan, District, Hammersmith and City, and Circle Lines, with a new fleet of standardised car design, totalling 191 trains.[1]
The 'S' designation stands for 'Sub-surface,' following the London Underground tradition of designating surface fleets with a letter associated with its intended route. (Thus the "A" stock operates to Amersham, the "C" stock operates the Circle Line, and "D" stock the District Line). The "S" designation was also one of the few letters which had not been historically used to identify a significant fleet, noting that the Metropolitan Railway S-stock of 1936 was only formed of one eight-car prototype train set.
The stock, part of Bombardier’s Movia family, will be delivered in the form of 133 "S7" seven-car trains and 58 "S8" eight-car trains between 2010 and 2013 and will also feature air conditioning throughout - the sub-surface tunnels being able to displace the exhausted hot air. These trains will also have regenerative brakes, returning around 20% of their energy use to the network and so will reduce energy consumption.[2]The trains are planned to have faster acceleration than the present trains, 1.3m/s/s (considerably faster than all previous trains and similar to the K-Stock on the Hong Kong MTR), but their top speed will be capped at 62 mph (100 km/h). This is 8 mph slower compared to the maximum speed of the A-Stock (70 mph) but is still faster than the C and D stocks. During the period of dual operation between old and new trains, the S-stock trains will have their performance capped to match that of the older trains in order to comply with signalling constraints and avoid bunching of the service. Based on the official figures from Bombardier the new trains in the 8 car configuration will be able to accommodate 306 seated passengers compared with 448 passengers of the A-stock, a reduction of 32%; however, S-stock will be capable of accommodating 25% more standing passengers (1226 as compared to 976 in A-stock) and will have dedicated space for wheel-chair users.
The extended East London Line has transferred to London Overground, and so will operate a new batch of Electrostar units rather than the S Stock.

[edit] References
^ Metronet Rail Rolling out new trains Metronet Rail
^ Transforming the Tube Circle Transport for London Transport for London

[edit] External links
Artist's impression
Vehicle 21100 on its way for testing at Old Dalby Test Track - part of the first set completed
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History
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S Stock
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[show]
v • d • eHammersmith & City line
Stations
Aldgate East · Baker Street · Barbican · Barking · Bow Road · Bromley-by-Bow · East Ham · Edgware Road · Euston Square · Farringdon · Goldhawk Road Road · Great Portland Street · Hammersmith · King's Cross St. Pancras · Ladbroke Grove · Latimer Road · Liverpool Street · Mile End · Moorgate · Paddington · Plaistow · Royal Oak · Shepherd's Bush Market · Stepney Green · Upton Park · West Ham · Westbourne Park · Whitechapel · Wood Lane

Rolling stock
C Stock
History
Former companies
Metropolitan and Metropolitan District Railways
Future proposals
Route
Merge Proposals
Future rolling stock
S Stock
See also
District line · Circle line · Metropolitan line
London Underground · Transport for London
[show]
v • d • eMetropolitan line
Stations
Central London section
Aldgate · Barbican · Euston Square · Farringdon · Great Portland Street · King's Cross St. Pancras · Liverpool Street · Moorgate
Core section
Baker Street · Finchley Road · Harrow-on-the-Hill · Northwick Park · Preston Road · Wembley Park
Uxbridge branch
Eastcote · Hillingdon · West Harrow tube station · Ickenham · Rayners Lane · Ruislip · Ruislip Manor · Uxbridge
Outer section & branches
Amersham · Chalfont & Latimer · Chesham · Chorleywood · Croxley · Moor Park · North Harrow · Northwood · Northwood Hills · Pinner · Rickmansworth · Watford

Rolling stock
Present rolling stock
A60 and A62 Stock
History
Former companies
Brill Tramway · Metropolitan Railway · Metropolitan and St John's Wood Railway
Closed stations
Brill · Granborough Road · Lord's · Marlborough Road · Quainton Road · Swiss Cottage · Verney Junction · Waddesdon · Waddesdon Road · Westcott · Winslow Road · Wood Siding · Wotton
Former stations
Aylesbury · Great Missenden · Stoke Mandeville · Wendover
Transferred lines
East London Line · Hammersmith & City line · Jubilee line · Great Northern & City Railway
Former rolling stock
CP Stock · CO Stock · F Stock · G Stock · M Stock · MV Stock · MW Stock · N Stock · O Stock · P Stock · P1 Stock · R Stock · S Stock · T Stock · U Stock · V Stock · VT Stock · W Stock · Circle Stock · GN&C Stock · Main Line Stock · Shuttle Stock
Former locomotives
A Class · B Class · C Class · D Class · E Class · F Class · G Class · H Class · K Class · Metropolitan District · Metropolitan departmental · ex GWR · Metropolitan Railway Peckett Saddle Tank · Wotton Tramway
Metro-Land
Metro-land · Metro-land (TV)
Future proposals
Croxley Rail link
Croxley Rail Link · Ascot Road · Croxley · Croxley Green · Watford High Street · Watford Junction · Watford Stadium · Watford West
Future rolling stock
S Stock
Other
West Hampstead interchange
London Underground · Transport for London
from the Manufacturer's website gives some technical data on S Stock.
Retrieved from "http://en.wikipedia.org/wiki/London_Underground_S_Stock"
Categories: London Underground rolling stock London Underground electric multiple units