British Rail Class 77

Infobox Locomotive
name = British Rail Class 77
powertype = Electric


caption = Preserved locomotive, no. 27000 in original black livery.
builder = BR Gorton Works
builddate = 1953–1954
totalproduction = 7
gauge = RailGauge|ussg|lk=on|al=on
tractionmotors = Metropolitan Vickers
electricsystem = 1500 V DC
collectionmethod = Pantograph, 2 off
poweroutput = convert|2490|hp|0|abbr=on|lk=on
tractiveeffort = convert|45000|lbf|kN|abbr=on|lk=on
wheeldiameter = convert|4|ft|2|in|m|3|abbr=on
whytetype = Co+Co
trainbrakes = Vacuum
locobrakeforce = convert|85|LTf|kN|sigfig=3|abbr=on|lk=in
locobrakes = Air and electrical regenerative
length = convert|59|ft|0|in|m|2|abbr=on
width =
height =
weight = convert|102.5|LT
topspeed = convert|90|mph|0|abbr=on|lk=on
trainheating = Steam generator
railroad = British Railways
roadnumber = 27000–27006
axleloadclass =
retiredate = September 1968
disposition = All sold to Netherlands as NS 1500 ClassThe British Rail Class 77, also known as Class EM2, is a class of 1.5 kV DC, Co-Co electric locomotive. They were built by Metropolitan Vickers in 1953–1954 for use over the Woodhead Line between Manchester and Sheffield.

Description

Seven locomotives of this type were constructed. They represented the first Co-Co type of overhead electric locomotive built for use in the United Kingdom. The design was based on that of the smaller Class EM1, which dated from 1941. Initially, 27 locomotives of this type had been planned, but by the early 1950s, the benefits of using the 25 kV AC system had been demonstrated, which meant that the Woodhead Line would be an isolated electric system. Consequently the order was cut to just seven locomotives.

The locomotives were initially numbered 27000-27006 and were painted in BR black livery. Construction took place at Gorton Works, Manchester with electrical equipment supplied by Metropolitan Vickers. All seven were named after characters from Greek mythology in 1959-1960. They were primarily used for express passenger trains between Manchester Piccadilly and Sheffield Victoria. In 1957, the class was renumbered with the addition of an "E" prefix to the number. In the early 1960s, the class started to receive the standard BR green livery. At least one of the class, E27002, received the electric blue livery carried by the AC electric locomotives.

The class was withdrawn en masse in September 1968. They were stored at Bury by BR in the hope of sale to a foreign railway. The passenger service for which the Class 77s were built continued to be operated by Class 76s, but was withdrawn on 5th January 1970. The Woodhead Line was closed in 1981.

Further use

In September 1969 the entire class was sold to Dutch Railways, Nederlandse Spoorwegen (NS), where they became NS 1500 Class. They were renumbered in the 1500 series in the order they left their workshops, where they received various modifications, including new headlight clusters. The locomotives also retained their names. One locomotive, no. E27005 "Minerva" was broken up and used for spares. The remaining six locomotives were employed until final withdrawal in 1986. Their main work was on the Den Haag Centraal to Köln (Cologne) express trains as far as the border at Venlo although they travelled to their home depot at Maastricht either with a train or light engine on Sunday for their weekly examination before returning to traffic the following day. They were sometimes to be found on freight trains bound for the German border originating in the Rotterdam area.

Fleet details

External links

* [http://www.thewoodheadsite.org.uk/MotivePower/Em2coco.htm Description of the class]
* [http://www.thewoodheadsite.org.uk/ Website of the EM2 Society]
* [http://www.klassieke-locs.nl/ Website of the Werkgroep Loc 1501]
* [http://www.lner.info/locos/Electric/em2.shtml EM2 Page on the LNER Encyclopedia]