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British class of electric multiple unit

British Rail Class 305

British Rail Class 305
All data from the card 39
In service
1959–2002
Manufacturer
British Rail
Order nos.
30566 (BDTSOL, 305/2, as built)30567 (MBSO, 305/2)30568 (TSOL, 305/2)30569 (DTSO, 305/2)30570 (BDTSO, 305/1)30571 (MBSO, 305/1)30572 (DTSO, 305/1)
Built at
Holgate Road, York (305/1)Doncaster Works (305/2)
Family name
BR First Generation EMU
Replaced
Steam locomotives and carriages
Constructed
1959–1960
Refurbished
1983–1984 (305/2 facelift)
Number built
71
Number preserved
0
Number scrapped
71
Successor
Class 322 Class 323
Formation
Class 305/1 BDTSO+MBS+DTSO Class 305/2 As Built BDTSOL+MBSO+TCsoL+DTS Class 305/2 Facelifted BDTCOL+MBS+TSOL+DTSO Class 305/3 BDTSO+MBS+TCsoL+DTSO
Design code
AM5
Fleet numbers
Class 305/1: 305401-30545275462-75513 BDTSO61429-61480 MBS75514-75565 DTSO Class 305/2: 305501-30551975424-75442 BDTSOL later BDTCOL61410-61428 MBS later MBSO70356-70374 TCsoL later TSOL75443-75461 DTS later DTSO
Capacity
272 seats (305/1), 344 2nd + 19 1st (305/2)
Operators
British RailNetwork SouthEastScotRail (British Rail)First North WesternScotRail (National Express)
Depots
Ilford EMDEast Ham EMDGlasgow Shields RoadLongsight Electric
Car body construction
Welded steel and sprayed asbestos
Train length
199 ft 6 in (60.81 m) (305/1)265 ft 8+1⁄2 in (80.99 m) (305/2)
Car length
63 ft 6+1⁄2 in (19.37 m)
Width
9 ft (2.74 m)
Height
12 ft 7 in (3.835 m)
Doors
Slam Door
Articulated sections
3 or 4
Wheelbase
46 ft 6 in (14.173 m) (bogie centres)8 ft 6 in (2.59 m) (bogies)
Maximum speed
75 mph (121 km/h)
Weight
119 t (117 long tons; 131 short tons) (305/1)154 t (152 long tons; 170 short tons) (305/2)
Traction motors
4 × GEC WT380 of 153 kW (205 hp)
Auxiliaries
240 V from the tertiary winding of the main transformer for heating and for a Westinghouse charger feeding 110 V dc for lighting and battery charging
Power supply
Mercury-arc rectifiers (later replaced with silicon diode)
HVAC
Electric
Electric systems
25 kV 50 Hz AC Overhead(and 6.25 kV until 1983)
Current collection
Pantograph
Bogies
Gresley ED5 (MBS)Gresley ET8 (DTS)Gresley ET5 (BDTS, BTDC, TScompound bolster
Braking system
Westinghouse EP air
Safety system
AWS
Coupling system
Drophead
Track gauge
1,435 mm (4 ft 8+1⁄2 in) standard gauge

The British Rail Class 305 was an alternating current (AC) electric multiple unit (EMU). Under the pre-1973 British Rail numbering system, the class was known as AM5; when TOPS was introduced, it became Class 305.

Subclasses

Class 305 had four subclasses:

  • 305/1 3-car units, standard class accommodation only, 52 units built in 1960
  • 305/2 4-car units, first and standard class accommodation, 19 units built in 1959
  • 305/3 4-car units, first and standard class accommodation, 8 units converted from 305/1 in 1988 by adding a TC from Class 302 units
  • 305/9 3-car unit, non-passenger departmental conversion, converted 1984

Operations

A Class 305 at Edinburgh Waverley in 2001
A Class 305 at Edinburgh Waverley in 2001

305/1 units were generally deployed on inner suburban services on the Lea Valley lines out of London Liverpool Street to Chingford, Enfield Town and Hertford East. They mainly worked the Chingford and Enfield branches, where their average scheduled speed was 22 mph (35 km/h). However, they were also used on the Great Eastern lines out of London Liverpool Street and occasionally worked out of their ‘normal’ operating area when coupled to a 305/2 unit or any of the compatible EMUs in use at the time. These units were distinguished by their lower backed seating. 305/1 units were replaced from 1980 onwards by Class 315 units. They were not generally used elsewhere, but a number of units operated around Manchester in the mid 1990s. All examples of the subclass were scrapped.

305/2 units were generally deployed on outer suburban services on the Lea Valley Line out of London Liverpool Street to Bishops Stortford, the extent of electrification until 1987, where their average scheduled speed was 34 mph (55 km/h). Like the 305/1 units, they could occasionally be seen on other services out of Liverpool Street and were sometimes coupled to other compatible EMUs for multiple working.

One unit was converted in 1984 for use as a mobile classroom in connection with the East Coast Main Line electrification project, becoming unit 305935, painted in InterCity livery. One of the driving vehicles contained blue asbestos and was subsequently replaced with a driving vehicle from a withdrawn Class 302 set, forming a hybrid set but retaining the same unit number (305935). The unit was later used in East Anglia as part of the Great Eastern electrification and was deployed at Ipswich, Harwich Town and Cambridge.

The 305/2s were refurbished in the mid-late 1980s. As with the 308s, this involved moving first class to a driving trailer, new interior panels, new seats and fluorescent lights.

The 305/2s were initially replaced on the Lea Valley Line by Class 310 units during the late 1980s/early 1990s. Most of the 305/2s were overhauled at Doncaster, painted in Regional Railways livery and shortened to 3-car sets, before moving to the Manchester area, taking over services previously diagrammed by Class 304 units.

A handful were further repainted into Greater Manchester PTE livery, some regaining their TSO trailer and receiving additional luggage racks dedicated to the new services to Manchester Airport. Once Class 323 units were introduced, the 305s were gradually withdrawn; a few were retained on Glossop line services until track realignment was performed in 1997, allowing the longer bodied Class 323s to negotiate the sharp curves at Dinting station. The surviving units also occasionally turned up on other local services around Manchester, with the last 305 to work in the North West believed to be 305506 on 22 May 2000 operating the 20:57 from Stoke-on-Trent to Manchester Piccadilly.

Five 305/5s (305501-502, 508, 517 and 519) moved to Glasgow Shields depot retaining their 4-car configuration; they finished their working lives running the route from Edinburgh Waverley to North Berwick. The last unit in service, 305517, ran its final service on 25 January 2002, operating the 17:15 North Berwick to Edinburgh Waverley; it was sent for scrap on 31 January 2002, along with 305501 and 305519.

Accidents and incidents

  • On 14 February 1990, an empty stock train formed of a Class 305 and a Class 308 unit was derailed at East Ham.

Preservation attempts

AC EMU Group aimed to save a Class 305 driving trailer, but by the time funding was found, they had all been scrapped, so a Class 308 driving trailer was saved instead.

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Text from Wikipedia, CC BY-SA 4.0 · Source article