The Class 377 Electrostar is a British electric multiple-unit train (EMU) built by Bombardier Transportation at its Derby Works, from 2001 to the present. The Electrostar family is the most numerous type of EMU built in the post-privatisation period of Britain’s railways.
The class forms the major part of the Govia Thameslink Railway (GTR) fleet for Southern and Thameslink services. They are primarily seen on services in the south of England.
The units work suburban services in south London, and main line commuter services to Sussex, Surrey, Kent and the South Coast, on which they replaced 4Cig and 4Vep slam-door stock which came to end of their useful lives and which did not meet modern health and safety requirements. Built in the early 2000s, the units had a troubled introduction; being fully air-conditioned, their higher power consumption compared to the slam-door Mark 1-based stock that they replaced led to major upgrades being required to the 750 V DC third-rail power supply used in the former Southern region. The collapse of Railtrack following the Hatfield accident further delayed this upgrade work, and the new stock did not enter squadron service until 2003.
Class 377s are fitted with external CCTV. There is a disabled seating area, and both intermediate coaches have toilets. Bodyside power doors are electrically operated, a move away from the air powered systems of previous generation EMUs. Dual-voltage units are fitted with a Brecknell Willis high-speed pantograph, incorporating a pair of aerofoils on the pan knuckle to steady the pan head against the OLE contact wire. The configuration of a 5-car Class 377 unit is:
DMOC(A) – 2 motors on inner bogie, sander, auxiliary converter module
MOSL – 2 motors on inner bogie, standard toilet
PTSOL – pantograph, transformer, compressor, disabled toilet
MOS – 2 motors on inner bogie, standard class interior (only found on Class 377/6 and 377/7 units)
DMOS(B) – 2 motors on inner bogie, sander, auxiliary converter module
In 4-car units the driving cars are composite, with the first-class saloon between the driving cab and the first set of passenger doors. 4-car units also do not contain the MOS coach.
Mitrac is the Bombardier Train Management System (TMS). It provides monitoring of on-train systems, fault-finding diagnostics, event monitoring, and preventative maintenance. In conjunction with the onboard GPS receiver, Mitrac controls Selective Door Operation (SDO), as well as automatic Passenger Information System (PIS) displays and Public Address announcements. Engineers can access the system remotely via GSM to download the fault log, then carry out real-time diagnostics while the train continues in service.
The Evolution Series is a line of diesel locomotives built by GE Transportation Systems, initially designed to meet the U.S. EPA’s Tier 2 locomotive emissions standards that took effect in 2005. The first pre-production units were built in 2003. Evolution Series locomotives are equipped with either AC or DC traction motors, depending on the customer’s preference. All are powered by the GE GEVO engine.
The Evolution Series was named as one of the “10 Locomotives That Changed Railroading” by industry publication Trains Magazine. It was the only locomotive introduced after 1972 to be included in that list
Currently, six different Evolution Series models have been produced for the North American market. They are all six axle locomotives and have the wheel arrangement C-C (AAR classification) or Co’Co’ (UIC classification), except for the ES44C4 which has an A1A-A1A wheel arrangement. All North American Evolution Series locomotives are equipped from the factory with a Nathan-Airchime K5HL-R2 “Evolution” airhorn, and most later models are equipped with a Graham-White 373 (electronic) E-BELL.
The ES40DC (Evolution Series, 4000 HP, DC traction) replaced the Dash 9-40CW model in GE’s range and, like the former model, was delivered exclusively to Norfolk Southern Railway. ES44DC’s owned by CSX Transportation were also given this designation after being de-rated to 4,000 hp (3,000 kW). As of 2014, all of Norfolk Southern’s ES40DCs have been uprated to 4,400 horsepower (3,300 kW), making them ES44DCs.