British Rail Class 204

British Rail Class 204

Infobox DMU
name = British Rail Class 204


imagesize = 300px
background = #0033cc
caption = 204004 pictured on arrival at Eastleigh on 28th August 1986
Manufacturer =
Operator = British Rail
Formation = unknown
Built =1957
LinesServed =
InService = 1957-
CarLength = y
CarWidth =
CarHeight =
Weight =
Capacity =
MaxSpeed = unknown
Gauge =
Traction =
Engine =English Electric 4-cylinder type 4SRKT Mark II of convert|600|bhp|abbr=on at 850 rpm
SafetySystem= |The British Rail Class 204 designation has been used twice for two similar types of diesel-electric multiple units.

The original units, numbered in the range 1119-1122, were two-car versions of the Class 205 '3H' units, and were classified as 2H under the old system.

In 1979, BR decided to augment the two-car units to three-car formation. Three of the four units were reformed with the addition of centre trailers taken from 3H (Class 205) units, and thus were themselves reclassified as Class 205.

The fourth 2H unit, and the three former 3H units which had given up their trailers, were augmented by reusing the ex-2EPB driving trailers from redundant Class 206 units. The Class 204 designation was re-applied to these four newly formed units (which were also given the classification 3T under the old system). They were renumbered into the range 1401-1404. In 1986, the units were renumbered to 204001-004 to conform with the TOPS numbering system.

Technical details

Power car (one per set)

* Introduced: 1957
* Weight: 56 tons
* Engine: English Electric 4-cylinder type 4SRKT Mark II of convert|600|bhp|abbr=on at 850 rpm
* Transmission: Electric, two English Electric type EE507 traction motors rated at 375 kW (~500 bhp) each.
* Maximum tractive effort: 12,500 lbs (55,602 N)
* Driving wheel diameter: convert|3|ft|6|in|m|abbr=on
* Coupling code: Standard 'Buckeye' compatible with contemporary class 20x and 4xx units.
* Train heating: Electric

Fleet Details

* ex-Class 205

Preservation

Of the original 2H units, a single driving trailer has been preserved.
*205008 (ex-1121) - DTCsoL 60820 - Hastings Diesels at St Leonards-on-Sea

None of the reformed 3T units are preserved.

External links

* [http://www.hastingsdiesels.co.uk Hastings Diesels]


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