London Underground D78 floor

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London Underground D78 floor
A class D78 railcar on the last day of operation on the District Line
A class D78 railcar on the last day of operation on the District Line
Numbering: Railcar: 7000–7129 + 7500–7539
Sidecar: 17000–17129 (continuous) + 17500–175538 (only even numbers)
Railcar without driver's cab: 8000–8129
Number: 75 moves
Manufacturer: Metro Cammell
Year of construction (s): 1978-1981
Gauge : 1435 mm ( standard gauge )
Length over coupling: 110,900 mm (whole train)
Height: 3630 mm
Width: 2840 mm
Trunnion Distance: 11,885 mm
Empty mass: Railcar: 30.7 t
Railcar without driver's cab: 29.8 t
Sidecar: 21.2 t
Whole train: 163.6 t
Power system : 630 V DC
Power transmission: two power rails (positive and negative)
Seats: 280

The London Underground D78 Stock (or just D Stock for short) was a series of electric railcars for the large-profile routes of the London Underground , which was used on the District Line . The entire fleet was replaced by the new S Stock between 2015 and 2017 . The name is derived from the first letter for the area of ​​operation (District Line) and the planned year of commissioning (1978).

history

The series was ordered in 1976 to replace the pre-war CO / CP stock and post-war R stock, which were still in use on the District Line at the time. The 75 trains were built by Metro-Cammell and used in passenger service from January 28, 1980, the last vehicles were delivered in 1983. From summer 2005 to 2008, the vehicles were completely modernized by Bombardier Transportation in Derby .

Train formation and details

The D series trains operated as six-car trains, each made up of two half-trains . Each half-train consisted of a railcar with a driver's cab (“Driving Motor Car”, DM), a non-powered sidecar (“Trailer Car”, T) and a railcar without a driver's cab (“Uncoupling Non-Driving Motor Car”, UNDM). The railcars running in the middle of the train without a driver's cab were equipped with an auxiliary driver's cab for the shunting service at the service coupling end. In 20 of 150 half-trains there were two motor coaches with full driver's cabs. These could also be used as a half-train in passenger service. The other half-trains could only be used coupled with another half-train. In the last few years of operation, only six-car trains were used in passenger operations on the District Line, but half-trains operated on the former East London Line from 1985 to 1987, for example . As with most series of the London Underground, the control current couplings at the service coupling ends were mirrored asymmetrical. This meant that only A and D ends could be electrically coupled.

As was customary at the time, the cars were delivered with unpainted aluminum car bodies, only the front below the driver's cab was painted red. As innovations, the vehicles received bogies with improved suspension and ergonomically improved driver's cabs. As part of the modernization, the vehicles were painted in the underground colors customary today (driver's cab and doors red, car body white with a blue stripe below). The cars of this type were the last to run unpainted on London Underground. During the modernization, the vehicles also received redesigned interiors and a passenger information system with automatic station announcements and LED displays in the vehicles, and the exterior destination displays were also replaced by LED displays. As the first series, the D Stock also received electronic target displays on the sides of the vehicles.

commitment

The D Stock was used on the District Line, with the exception of the trips between Wimbledon and Edgware Road , as the platforms at Notting Hill Gate , Bayswater , Paddington and Edgware Road stations are too short for D78 trains. Trains of the C69 and C77 series were used here. From 1985 to 1987 D-series units were also used on the East London Line. This made it possible to work on the A60 / A62 Stock trains that are normally used there .

On April 21, 2017, the last scheduled use of a D-Stock train on the District Line took place, on May 7, 2017 the farewell trip took place, which included a trip across the entire District Line, including sections that were not officially recognized be driven more. This is said to have been the last official passenger run of this series on the London Underground network.

gallery

literature

  • Brian Hardy: London Underground Rolling Stock . 15th edition. Capital Transport, Harrow Weald 2002, ISBN 1-85414-263-1 .

Web links

Commons : London Underground D78 Stock  - collection of images, videos and audio files