British Rail Class 486

Infobox EMU
name = British Rail Class 486

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imagesize = 300px
caption = Class 486s at Ryde Pier Head railway station.
background = #243D5C
Manufacturer = Metro Cammell, Union Car, Cammell Laird
Operator = Network SouthEast
Formation = 3 cars per trainset
InService = 1923 on London Underground
1967 - 1992 on Island Line
Weight = 65 t
Capacity = 106 seats
MaxSpeed = 45 mph
Gauge = 1,435 mm
Voltage = 630 V DC 3rd railThe British Rail Class 486 (or 3Tis) electrical multiple units were originally built for the London Electric Railway from 1923-31 as their 'Standard' tube stock. They were purchased by British Rail in 1967 and transported to the Isle of Wight to work 'mainline' services on the newly electrified Ryde to Shanklin line. At the time the units had already worked for over forty years on the London Underground, but their introduction allowed the final steam locomotives on the line to be withdrawn.

Six three-cars were refurbished by BR's Stewarts Lane depot in 1966-67. The units were initially classified Class 451 and numbered 031-036, later reclassified Class 486 and numbered 486031-036. A spare driving motor car was also refurbished, given the unit number 486037. Each unit was formed of a driving motor, an intermediate trailer, and a driving trailer. Thus, the formation was DMBSO+TSO+DTSO.

When introduced, the units carried all-over BR blue livery. This progressed to standard blue/grey livery in the 1970s, and finally some units received Network SouthEast's blue livery with red and white stripes, following its introduction in 1986.

Electric services on the Isle of Wight commenced on 20 March 1967. In service, it was common for the 3Tis units to work in combination with a 4Vec unit, such that a train was formed of seven coaches. The name "Vectis" is the Roman name for the Isle of Wight.

Due to the proximity to the sea, the units suffered from bad corrosion damage. By the mid-1980s it was clear that the units needed replacing. The replacements came from the 2-car Class 483, which were also rebuilt from former London Underground stock, namely 1938 tube stock. These new units were introduced from 1989. The last 3Tis and 4Vec units were withdrawn from service in 1992.

No 3Tis units were saved for preservation. However, several 4Vec vehicles were sold back to London Underground for eventual restoration as part of an operational 'Standard' stock museum unit.

Fleet Details

Details of the original 1967 formations are shown below.

External links

* [http://www.therailwaycentre.com/Recognition%20Tech%20Data%20EMU/EMU_485_486.html Photographs and further details of 4Vec and 3Tis units.]
* [http://www.semgonline.com/gallery/class485_486_01.html Photographs of Class 485 and 486 units.]