London Underground 1972 Stock
London Underground 1972 Tube Stock (or short only 72 tube stick ) is a line of electric railcar that is currently being used on London's Bakerloo Line. According to the usual conventions London Underground, the term of the proposed year of entry (1972 ) derives.
History
A first series - called Mk.I 1972 Tube Stock - has been appointed for the Northern Line at Metro - Cammell, since, after a strike, employees in the workshop Acton Works, the state of the deployed there trains of 1938 Tube Stock increasingly deteriorated and they had to be replaced. However, on the Piccadilly Line of the order of 1973 Tube Stock released 76 trains of 1959 Tube Stock was not sufficient for operation of the Northern Line, as it came to ordering the 1972 Mk.I tube stick. The first of 30 trains ordered, was put into service on February 27, 1972, the other trains were followed until June 1973. A second series of 33 trains and is followed than in 1972 Mk.II tube stick known. The appointment of the second series was made mainly for political reasons, since the manufacturer Metro - Cammell was to be insolvent by a lack of orders danger. Although vehicles were for the future Fleetline (later renamed Jubilee Line ) is required, it should however be opened after original plans in 1977, the first trains of the second series but were put into service already on November 19, 1973, were thus the Fleetline much too early, so that these vehicles were initially used on the Northern Line.
The trains of the first series are now made largely out of service because they were replaced by vehicles of the 1995 Tube Stock, only a few vehicles were adjusted to the 1967 Tube Stock and the second series and now belong to their fleets. From the first series of this have been only three trains, originally intended for both series, modernization. These traits are, however, the fleet of 1972 Mk.II tube stick today. The modernization of these three traits and the second series was carried out from 1991 to 1995 by the Tickford Rail Ltd. .. The replacement of the Mk.II 1972 Tube Stock is currently scheduled for around 2020.
Train composition and details
The trains of 1972 Tube Stock resemble in many details of the previous series, the 1967 Tube Stock, therefore individual vehicles for use with the 1967 Tube Stock on the Victoria Line it was relatively easy to adapt. One difference lies in the renunciation of the equipment for Automatic Train Operation ( automated driving). The trains are operated manually and originally had still a job for a so-called Guard ( door guard ). The trains of 1972 Tube Stock are with seven cars and a car shorter than trains of 1967 Tube Stock with its eight cars. This also results in a deviating from the 1967 Tube Stock train formation. A train of 1972 Tube Stock consists of one each 4-car and a 3- car unit. A 4-car unit has it at each end of a Driving Motor Car (DM) and in the middle of two trailers Cars ( T), while a 3- car unit of a driving motor car, a trailer and a car Uncoupling Non- Driving motor Car ( UNDM ) exists. For a complete train, this results in the serialization DM- TT- DM- T- DM UNDM. A Driving Motor Car is equipped with a driving cab and drive motors, one Uncoupling Non Driving Motor Car has even drive motors, but not a full cab, but only a Rangierfahrschalter to shunting in depots allow. A trailer car has neither input nor cab.
A special case is the four -piece unit with the Driving Motor Car 3299 that of all other four-car units instead of a second motor car a Uncoupling Non Driving Motor Car performs differently. Reason for this different ranking is the fact that after an accident, a motor car with cab lacked, however, was still a motor vehicle without a driver's cab available. In order to recognize this unit directly, the wagons used were numbered 3299 (DM), 4299 (T), 4399 (T) and 3399 ( UNDM ) that 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, this has been retained in the second series in the car bodies, but the doors were already here red color. Today, after its modernization all vehicles standing still in operation in the London Underground colors are ( red cab and doors, car body white with blue stripes on the bottom ) painted. In addition, the 1972 Tube Stock Mk.I had a display for the three-digit train number in the front door under the window, in 1972 Mk.II tube stick, this was housed in the left from outside the cab window. Despite their similarity could not be coupled to form a train units from the first and second series until 1983.
Use
The vehicles of the first series were used as planned on the Northern Line, the vehicles of the second series came first on the Northern line to use for the replacement of old cars of the type in 1938 to accelerate tube stick. Starting in 1977, the units of the second series to Bakerloo Line was added 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 came first only on this line are used. After reduction in schedule individual cars came in 1983 back to the Northern Line. With the arrival of the first shipment of the 1983 Tube Stock were released on the Jubilee Line 14 trains of 1972 Tube Stock Mk.II that were moved back to the Northern Line. The trains used on the Northern Line of the second series came later back on the Bakerloo Line, the remaining features of this series then came 1989 to the Bakerloo Line, after the second delivery of the 1983 Tube Stock was received.
The trains of the first series were retired in 1999 and replaced by the 1995 Tube Stock, with individual vehicles after conversions are among the fleets of the 1967 Tube Stock or 1972 Mk.II tube stick. From 1972 Mk.II tube stick stand 36 trains ( with tags from the first series ) is still on the Bakerloo Line in service.