London Underground 1972 Tube Stock

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London Underground 1972 Tube Stock
A 1972 Tube Stock train
A 1972 Tube Stock train
Numbering: 1972 Mk.I Tube Stock
DM: 3201-3230, 3301-3330, 3501, 3530
T: 4201-4230, 4301-4330, 4501-4530
UNDM: 3401-3430
1972 Mk.II Tube Stock
DM: 3231-3248, 3250 –3256, 3258–3267, 3299, 3531–3538, 3540–3567
T: 4231–4248, 4250–4256, 4258–4267, 4299, 4331–4348, 4350–4356, 4358–4367, 4399, 4531–4538, 4540-4567
UNDM: 3399, 3431-3438, 3440-3467
Number: 63 trains (including 30 Mk.I and 33 Mk.II)
36 trains (still in service)
Manufacturer: Metro Cammell
Year of construction (s): 1972-1974
Gauge : 1435 mm ( standard gauge )
Length over coupling: 113.907 mm (whole train)
Height: 2,877 mm
Width: 2,642 mm
Trunnion Distance: 10,338 mm
Empty mass: DM: 28.25 t
UNDM: 26.93 t
T: 18.39 t
Whole train: 166.83 t
Power system : 630 V DC
Power transmission: 2 power rails (positive and negative)
Seats: 264

The London Underground 1972 Tube Stock (or just 72 Tube Stock for short) is a series of electric railcars currently in service on London's Bakerloo Line . In accordance with the usual conventions at London Underground , the name is derived from the planned year of commissioning (1972).

history

A first series - called the 1972 Mk.I Tube Stock - was ordered from Metro-Cammell for the Northern Line , as the condition of the 1938 Tube Stock trains used there deteriorated due to a strike by employees in the Acton Works workshop had to be replaced. However, the 76 trains of the 1959 Tube Stock that became available on the Piccadilly Line through the ordering of the 1973 Tube Stock were not sufficient to operate the Northern Line, so the 1972 Mk.I Tube Stock was ordered . The first of 30 trains ordered was put into service on February 27, 1972, the other trains followed until June 1973. A second series of 33 trains followed and is known as the 1972 Mk.II Tube Stock . The order for the second series was mainly made for political reasons, as the manufacturer Metro-Cammell was in danger of becoming insolvent due to a lack of orders. Vehicles were required for the future Fleet Line (later renamed the Jubilee Line ), but according to the original plans this was not to be opened until 1977, but the first trains of the second series were put into service on November 19, 1973 and were therefore for the Fleet Line much too early, so that these vehicles were also used on the Northern Line for the time being.

The trains of the first series are largely decommissioned today, as they were replaced by vehicles from the 1995 Tube Stock , only individual vehicles were adapted to the 1967 Tube Stock or the second series and are now part of their fleets. Of the first series, only three trains received the modernization originally intended for both series. However, these trains are now part of the fleet of the 1972 Mk.II Tube Stock . The modernization of these three trains and the second series took place from 1991 to 1995 by Tickford Rail Ltd. The replacement of the 1972 Mk.II Tube Stock is currently scheduled for around 2020.

Train formation and details

The trains of the 1972 Tube Stock are similar in many details to the previous series, the 1967 Tube Stock, so it was relatively easy to adapt individual vehicles for use with the 1967 Tube Stock on the Victoria Line . One difference lies in the absence of the equipment for automatic train operation (the automated driving ). The trains are driven manually and originally had a workstation for a so-called guard (door guard). The trains of the 1972 Tube Stock with seven cars are also one car shorter than trains of the 1967 Tube Stock with its eight cars. This also results in a train formation that differs from the 1967 Tube Stock. A 1972 Tube Stock train consists of a 4-car and a 3-car unit. A 4-car unit has a Driving Motor Car (DM) at each end and two Trailer Cars (T) in the middle , while a 3-car unit consists of a Driving Motor Car , a Trailer Car and an Uncoupling Non- Driving Motor Car (UNDM) . The train sequence DM-TT-DM-UNDM-T-DM results for a complete train. A driving motor car is equipped with a driver's cab and drive motors, while an uncoupling non-driving motor car also has drive motors, but not a full-fledged driver's cab, just a shunting drive switch to enable maneuvering in the depots. A trailer car has neither a drive nor a driver's cab.

A special case is the four-part unit with the Driving Motor Car 3299, which, unlike all other four-part units, has an uncoupling non-driving motor car instead of a second motor vehicle . The reason for this deviating ranking is the fact that a motor vehicle with a driver's cab was missing after an accident, but a motor vehicle without a driver's cab was still available. In order to be able to recognize this unit directly, the cars used were given the numbers 3299 (DM), 4299 (T), 4399 (T) and 3399 (UNDM), which differ significantly from the numbers in the usual areas.

The vehicles of the first series were still delivered with unpainted aluminum car bodies and doors, with the car bodies this was also retained in the second series, but the doors were already red in color. Today, after its modernization, all vehicles still in service are painted in the London Underground colors (driver's cab and doors red, car body white with blue stripes on the floor). In addition, the 1972 Mk.I Tube Stock had a display for the three-digit train number in the front door under the window, in the 1972 Mk.II Tube Stock this was housed in the driver's cab window on the left. Despite their similarity, units from the first and second series could not be coupled to a train until 1983.

commitment

Interior of a 1972 tube floor

The vehicles of the first series were used on the Northern Line as planned , the vehicles of the second series were also first used on the Northern Line to speed up the replacement of the old 1938 Tube Stock cars . From 1977 the trains of the second series were moved to the Bakerloo Line in order to prepare the handover of the branch line to Stanmore to the new Jubilee Line . With the opening of the Jubilee Line, the vehicles of the second series were initially only used on this line. After timetable cuts, individual cars returned to the Northern Line in 1983. With the arrival of the first delivery of the 1983 Tube Stock , 14 trains of the 1972 Mk.II Tube Stock were released on the Jubilee Line, which were moved back to the Northern Line. The trains of the second series used on the Northern Line were later returned to the Bakerloo Line, the remaining trains of this series then also came to the Bakerloo Line in 1989 after the second delivery of the 1983 Tube Stock had arrived.

The trains of the first series were taken out of service in 1999 and replaced by the 1995 Tube Stock , with individual vehicles belonging to the fleets of the 1967 Tube Stock and 1972 Mk.II Tube Stock after modifications . Of the 1972 Mk.II Tube Stock, 36 trains (with modifications from the first series) are still in service on the Bakerloo Line.

literature

  • Brian Hardy: London Underground Rolling Stock . 15th edition. Capital Transport, Harrow Weald 2002, ISBN 1-85414-263-1 .

Web links

Commons : London Underground 1972 Stock  - Collection of images, videos and audio files