This article is about London Underground rolling stock introduced from 2010. For the 1930s stock, see London Underground S Stock (ex-Metropolitan Railway).
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London Underground S7 and S8 Stock
A Metropolitan line S8 Stock at Amersham in 2013
The interior of a Circle line S7 Stock train
In service
31 July 2010 − present
Manufacturer
Bombardier Transportation
Built at
Derby Litchurch Lane Works, Derby, England
Family name
Movia
Replaced
A60/62 Stock
C69/77 Stock
D78 Stock
Constructed
2008–2017
Entered service
31 July 2010 (S8)
6 July 2012 (S7)
Number built
192 trains (133 S7, 59 S8)[1]
Number in service
192 trains[1]
Formation
7 cars per train (S7)
8 cars per train (S8)
Fleet numbers
S7: 301/302–567/568
S8: 001/002–115/116
Capacity
1,209 (S7)
1,350 (S8)
Operators
London Underground
Depots
Ealing Common
Neasden
Upminster
Hammersmith (stabling only)
Lillie Bridge (stabling only)
Lines served
S7:
Circle
District
H. & City
S8: Metropolitan
Specifications
Car body construction
Aluminium
Train length
S7: 117.45 m (385 ft 4 in)
S8: 133.68 m (438 ft 7 in)
Car length
18.15 m (59 ft 7 in) (DM)
16.23 m (53 ft 3 in) (NDM)
[2]
Width
2.92 m (9 ft 7 in)[3]
Floor height
1,005 mm (39.6 in)
Entry
Level
Doors
6 per car (3 per side)
Wheel diameter
770–710 mm (30–28 in) (new–worn)[4]
Wheelbase
2.08 m (6 ft 10 in)[4]
Maximum speed
100 km/h (62 mph)
Traction system
Bombardier MITRAC IGBT–VVVF
Traction motors
3-phase AC induction motor
Acceleration
1.3 m/s2 (2.9 mph/s)
Deceleration
1.4 m/s2 (3.1 mph/s)
Electric system(s)
630–750 V DC fourth rail
Current collector(s)
Contact shoe
Bogies
Bombardier FLEXX Metro 1200 SSL[4]
Safety system(s)
Communications-based train control
Tripcock
Track gauge
1,435 mm (4 ft 8+1⁄2 in) standard gauge
The London Underground S7 and S8 Stock, commonly referred to as S Stock, is a type of passenger train running on the London Underground's subsurface lines since 2010. Manufactured by Bombardier Transportation's Derby Litchurch Lane Works, the S Stock was ordered to replace the A60, A62, C69, C77 and D78 stock on the Metropolitan, District, Hammersmith & City, and Circle lines, which all dated from the 1960s and 1970s.
The order was for a total of 192 trains (1,403 cars), and consisted of two types, S7 Stock for the Circle, District and Hammersmith & City lines, and S8 Stock for the Metropolitan line, with differences in the arrangement of seating and number of cars. Both types have air-conditioning and lower floors to ease accessibility for disabled people, and also have open gangways to allow passengers to move from one car to another whilst the train is moving. The order was said to be the biggest single rolling-stock order in Britain at a cost of £1.5 billion.
Passenger service began on the Metropolitan line in July 2010, the Hammersmith & City line in July 2012, and the Circle and District lines in September 2013. The S Stock completely replaced the A Stock on the Metropolitan line in September 2012, and the C Stock on the Circle and Hammersmith & City lines in February 2014, and on the Edgware Road branch of the District line in June 2014; it fully replaced the D Stock on the rest of the District line in April 2017.
^ abCite error: The named reference :6 was invoked but never defined (see the help page).
^"Metro – London, United Kingdom". Bombardier. Archived from the original on 27 December 2017. Retrieved 24 January 2023.
^Cite error: The named reference auto was invoked but never defined (see the help page).
^ abc"Business Unit Bogies - Product Portfolio Presentation" (PDF). Bombardier Transportation. January 2018. Retrieved 19 November 2023.
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