London Underground 1973 Stock


London Underground 1973 Stock

Infobox Underground stock


name=1973 Stock
InService=1975-present
Manufacturer=Metro-Cammell
LinesServed=Piccadilly
CarLength=DM 17,676 mm
UNDM/T 17,473 mm
CarWidth=2,629 mm
CarHeight=2,880 mm
Weight=DM 27.15 tons
UNDM 26.16 tons
T 18.16 tons
TubeStock=true
The 1973 Tube Stock operates on the Piccadilly Line of the London Underground, and was introduced in 1975 for the opening of the extension to Heathrow Central (now Heathrow Terminals 1, 2, 3).

A total of 88 trains were built in 1972-75 by Metro Cammell. They entered service between 1975 and 1977 and were later refurbished by Bombardier Transportation. The stock was refurbished between 1995 and 2000; the last unrefurbished train appearing in passenger service on the 21 August 2000. Like all London Underground trains, they operate on a four-rail 630 V DC power system.

The Piccadilly Line's 1973 stock trains are kept in depots at Cockfosters in the north-east and Northfields in the west. They are painted in the London Underground corporate livery - blue, white and red.

76 1973 stock trains are required for peak Piccadilly Line service.

Former rolling stock

The 1973 Stock was built to replace the 1956 Stock, 1959 Stock and the (seven) 1938 Stock trains formerly used on the Piccadilly Line. The opening of the extension from Hounslow West to Heathrow Central necessitated the construction of new trains, which would also need to be suitable for passengers with large amounts of luggage. The trains thus have extra space by the doors to allow for the luggage of passengers travelling to Heathrow Airport. The 1956/1959 Stock was subsequently transferred to the Northern Line and the 1938 Stock trains were scrapped.

Announcer system

The stock was fitted with a non-standard type of Digital Voice Announcer (DVA). Rather than other lines, which use wheel counters or GPS to automatically provide announcements, the 1973 stock announcements had to be operated manually by the driver keying in a unique code. This being rather cumbersome, most drivers made their own announcements, if at all. In November 2006, the system was changed to an automated announcer with a simultaneous upgrade to the dot matrix displays in the carriages. The driver can also select two settings "commuter" and "tourist". In addition to this, the driver can add extra announcements through a code for example "please stand clear of the doors" or "Let customers off the train first please"

In addition, the "alights" are missed out of the "commuter" setting.

The "Alight" sections include:

King's Cross St. Pancras tube station: "The Royal National Institute of the Blind"

Russell Square tube station: "The British Museum"

Covent Garden tube station: "London's Transport Museum"

Green Park tube station: "Buckingham Palace"

South Kensington tube station: "The museums and Royal Albert Hall"

Earls Court tube station: "Earls Court Exhibition Centre"

Holborn, Knightsbridge and Barons Court Stations are examples of stations which have an exclusive announcement due to their gaps: "Please mind the gap between the train and the platform."

In December 2007, the Piccadilly Line added St Pancras International to its dot matrix display and Digital Voice Announcer (DVA). The reading is as follows: "This is Kings Cross St Pancras. Change here for the Victoria, Northern, Hammersmith and City, Metropolitan and Circle Lines and national and international rail services".

In March 2008, the system went through another change - it has been the second announcer system to have the feature of saying "Please mind the gap between the train and platform" at the station before any other announcement, e.g: "Please mind the gap between the train and the platform. This is Barons Court. Change for the District Line. This is a Piccadilly Line service to Heathrow Terminals 1,2,3 and 5"

Additionally Hatton Cross and Hounslow West now plays an announcement to inform passengers about how to reach terminal 4 or 5 depending on the service.

Numbers

Unit formation

Each train is made up of two units of three cars:

DM - T - UDM | UDM - T - DM

Some units are also formed with a second DM in place of the UNDM - these are known as "double ended" units. A Driving motor car (DM) has a driver's cab and traction equipment. A trailer car (T) has neither cab nor traction equipment. A Non-driving motor car (UDM) has traction equipment without the driving cab, though it has control for purposes of uncoupling and shunting.

All trains in passenger service operate as two units, trains are only permitted to move as a single unit in depots. However one single double ended unit was used to operate the peak-hour Aldwych branch shuttle service, until the branch closed in 1994.

External links

* [http://www.tfl.gov.uk/tube/using/useful-info/technical/rolling/1973.asp Transport for London - 1973 stock specifications]
* [http://www.trainweb.org/tubeprune/73%20tube%20stock.htm Tubeprune - 1973 Tube Stock]
* [http://photos.ltmcollection.org London Transport Museum Photographic Archive]
**ltmcollection|o9/i00005o9.jpg|1973 Stock train at Oakwood, 1979
**ltmcollection|v8/i00000v8.jpg|1973 Stock 3-car train at Aldwych, 1981
**ltmcollection|x3/i0000ax3.jpg|End view of 1973 Stock motor car, 1975
**ltmcollection|wl/i0000awl.jpg|Interior view of 1973 Stock car, 1975


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