London Underground 1992 Stock
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The 1992 Tube Stock was built by ABB (now Bombardier Transportation) for the Central Line as the result of the extensive testing of the three 1986 tube stock prototype trains. Even so, the introduction of this stock was far from trouble-free and there were many technical teething problems.
Eighty-five trains were ordered from ABB, each formed of four two-car units (two units have driving cabs, the others are fitted with shunting controls). Upon entering service in April 1993, the new units gradually replaced the previous 1962 tube stock, which was finally withdrawn two years later. The trains were manufactured at the former BREL Carriage Works in Derby.
The propulsion for the trains was manufactured by a consortium of ABB and Brush Traction, and was one of the first examples of microprocessor controlled traction featuring a network to connect the different control units.
After the initial construction run, an additional ten two-car units were built for British Rail for the Waterloo & City Line, which until 1994 was part of the national railway network, and became their Class 482. When this line passed to London Underground at the start of the process to privatise British Rail on 1 April 1994, these units also passed to London Underground.
It was a fault with one of this type of trains that led to the Chancery Lane derailment on 25 January 2003. The whole fleet had to be taken out of service for several months, causing the complete withdrawal of services on the Central Line, to permit faulty bolts to be replaced.
TfL and Metronet closed the Waterloo & City line for five months from April to September 2006 to allow major upgrade work on the tunnels and rolling stock. The line's limited access meant that this was first time that the units had been brought above ground since their introduction 12 years earlier. The refurbishment of the trains saw them finally painted in the London Underground white, red and blue livery having operated in Network SouthEast colours since the stock's introduction.
[edit] Technical specifications
- Length per car 16.25m
- Width per car 2.62m
- Height 2.87m
- Unlaiden weight 20.5-22.5 tonnes
- Maximum speed 80 mph
[edit] External links
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