British Rail Class 73

From Wikipedia, the free encyclopedia

Class 73, no. E6013 (73107) at Rowsley South, on the Peak Railway on 17th April 2003. This locomotive was on loan from Fragonset Railways, and has since returned to main-line service.

Class 73/1 73101 in BR blue livery.

The British Rail Class 73 electro-diesel locomotives are very unusual as they are able to operate off 750 V DC third-rail electric supply, but also have a diesel engine to allow them to operate on non-electrified routes. This makes these machines very versatile, but the diesel engine produces less power than working from an electric supply, thus meaning they rarely stray from the former Southern Region of British Rail. Following the withdrawal of the more powerful Class 74 electro-diesels in 1977, the Class 73 is now unique on the British rail system.

[edit] Description

This class of 49 locomotives were built using English Electric components in two batches. The first batch of six locomotives were built by BR at Eastleigh works in 1962 and were numbered E6001-E6006. They were classified as Class JA under the initial classification scheme, but following the introduction of TOPS in 1968 they were reclassified as Class 73/0. In the early 1970s the locomotives were renumbered 73001-73006 in order.

The second batch of 43 locomotives were built later by Vulcan Foundry from 1965-1967, and were classified as Class JB. They were numbered in the range E6007-E6049. These later standard machines had several differences to the earlier prototypes, most notably an increased tractive effort and a higher maximum speed of 90 mph (compared to 80 mph). Following the introduction of TOPS, the JB machines were reclassified as Class 73/1 and were renumbered into the range 73101-73142. One locomotive, no. E6027 was withdrawn following accident damage and so was not renumbered.

[edit] Current operations

Since privatisation, the Class 73 fleet has been reduced in size following the large-scale withdrawals of the EWS and Gatwick Express fleets. However, many smaller operators have acquired locomotives, so their continued use is assured for the foreseeable future.

[edit] English, Welsh and Scottish Railway (EWS)

EWS no longer operate Class 73 locomotives.

[edit] Eurostar

Eurostar own two Class 73 locomotives, which have been specially modified to be enable them to haul a Eurostar unit. The two locomotives, nos. 73118 and 73130 have had additional coupling equipment installed, and are primarily used to rescue failed Eurostar sets, or to drag them over non-electrified routes, however they rarely stray from North Pole Depot.

[edit] FM Rail

FM Rail (previously Fragonset Railways) bought several redundant locomotives from EWS. Most of these were initially stored at various locations around the country, including preservation sites, such as the Mid-Hants Railway, the Peak Railway and the Dartmoor Railway. Some of these locomotives were repaired for use on these heritage railways, such as no. 73134 on the Dartmoor Railway.

One locomotive, no. 73107 "Spitfire" has now returned to mainline traffic following overhaul. It has been repainted in Fragonset's black freight livery, and is expected to be used on empty coaching stock moves associated with charter trains. It was regularly hired to GB Railfreight from late 2004 as cover for their fleet, however it is now based at C2C's East Ham Depot alsong with the Blue Pullman Rake.

Class 73, no. 73201 at Clapham Junction on 19th July 2003. This locomotive was one of the final three locomotives used by Gatwick Express.

[edit] Gatwick Express (National Express Group)

Until recently (mid 2005) GX operated several locomotive with Mk 2 EMU sets with GLV luggage vans. Hovever, most were withdrawn, being replaced by EMUs. However 73202 "Dave Berry" has been retained as a thunderbird.

[edit] GB Railfreight

GB Railfreight is the newest operator of Class 73 locomotives. It purchased six redundant Gatwick Express locomotives, numbers 73203-207 and 73209. Four of these (73204-206/209) have now been returned to traffic, after overhaul by Fragonset at Derby. They have been repainted in the company's blue and orange livery, and named after female employees. The locomotives are primarily employed on engineering trains originating from Eastleigh and Tonbridge. It has since purchased 73208 and repainted it into BR Blue.

[edit] Merseyrail Electrics

Merseyrail Electrics had a fleet of four Class 73/0 locomotives, based at Birkenhead North TMD, which were used on shunting and other departmental duties. Two locomotives, nos. 73001 and 73006 were repainted into Merseyrail's yellow livery. They were later fitted with sandite discharging equipment, and reclassified as Class 73/9. The locomotives were withdrawn from traffic by 2002, and all four were later sold for preservation.

[edit] Network Rail

Network Rail inherited two redundant Gatwick Express locomotives, nos. 73212 and 73213, from its predecessor Railtrack. These were overhauled and painted in the company's blue and green livery. They are used on engineering trains associated with an upgrade of electrical supply systems on the former Southern Region.

A third locomotive, no. 73141, was originally purchased as a supply of spare parts. However it has now been returned to traffic to act as a spare engine, in case of failure of one of the other two locomotives.

Class 73, no. 73201 at Woking. This locomotive is used by South West Trains as a "Thunderbird" to rescue failed trains.

The locomotives have been repainted into Network Rail all over yellow with red buffer beams. 73212 and 213 can usually been seen in Tonbridge West yard.

[edit] South West Trains

South West Trains inherited a sole locomotive, no. 73109, which is used as a "Thunderbird" rescue locomotive. It was named in 1990 to commemorate the 50th anniversary of the Battle of Britain. It is affectionately known as "BoB" by rail enthusiasts.

South West Trains have recently expanded their fleet, by acquiring two more locomotives, nos. 73201 and 73235. Both were former Gatwick Express locomotive. The first of these, no. 73235, was overhauled in early 2005 and repainted in the new Desiro blue livery. It was joined by no. 73201 later in the same year. Around the same time, no. 73109 was also repainted in to the new blue livery. The blue livery was chosen to match the Desiro stock, as almost all the slam-door stock had been withdrawn by mid-2005.

[edit] Preservation

Several locomotives have been preserved on heritage railways, where they run on diesel engines since no preserved line has third rail electrification. They are particularly popular because they have a small diesel engine and hence are efficient with speeds normally limited to 25mph, yet they are big mainline locomotives and thus more attractive than diesel shunters with similar-sized engines. Of note are the first built locomotive, No. 73001, and the former Pullman locomotive, No. 73101. 73136 has been rescued from a scrap yard and rebuilt by a group of enthusiasts to main line standards. It is certified by Network Rail for use on the main line at a speed of 90 mph. Some of the class have ended far from their former working routes, particularly 73119 on the Keith and Dufftown Railway in northeast Scotland.

[edit] Fleet Summary

[edit] Fleet Details

Wikimedia Commons has media related to: British Rail Class 73