London Underground A60 and A62 Stock
|A60 and A62 Stock|
Amersham (local) bound Metropolitan line train approaching Chorleywood station, Hertfordshire.
|In service||12 June 1961–26 September 2012 (51 years, 106 days)|
|Number built||58 trains|
|Number in service||2 trains + 2 cars (depot only)|
|Number preserved||1 car|
|Number scrapped||55 trains + 5 cars|
|Formation||DM-T-T-DM (per unit)|
|Fleet numbers||DM: 5000-5233
|Capacity||DM: 54 seats + 4 tip-up seats
T: 58 seats
|Car body construction||Aluminium|
|Train length||212 ft (65 m) (4 cars)|
|Car length||636.5 in (16,170 mm)|
|Width||116 in (2,900 mm)|
|Height||145 in (3,700 mm)|
|Doors||DM: two double and one single
T: three double
|Wheel diameter||3 ft (910 mm)|
|Maximum speed||Design: 70 mph (110 km/h)
Operational: 50 mph (80 km/h)
|Weight||DM: 32.1 tonnes
T: 21.8 tonnes
|Electric system(s)||630V DC fourth rail|
|Track gauge||1,435 mm (4 ft 8 1⁄2 in) standard gauge
London Transport portal
The London Underground A60 and A62 Stock  operated on the Metropolitan Line from 12 June 1961 to 26 September 2012, and on the East London Line from 1977 until 22 December 2007 (except in 1986, when One-man operation conversion of the fleet took place).
The A Stock was until September 2012 the oldest type of train in passenger service on the London Underground, also on any other Subway system in Europe. It was the only train to have luggage racks, separate motoring and braking controls and the last to have no automated announcements. The C Stock on the Circle Line and Hammersmith and City Lines are now the oldest.
Development and introduction
The core design of the A Stock was formulated by W S Graff-Baker of the London Passenger Transport Board as part of the electrification of the Metropolitan Line from Rickmansworth to Amersham and Chesham under the 1935–1940 New Works Programme. The project was delayed by the events of World War II and the lack of funds available during the austerity period after the war: however, in 1946 two experimental trailers similar in exterior appearance to the production trains were built using underframes of the T Stock. The trailers were scrapped when the trials concluded.
When electrification commenced in 1959, London Transport placed an order for 31 trains, later known as the A60 Stock to replace the T Stock on the services to Watford and Rickmansworth, and the locomotive hauled services to destinations north of Rickmansworth. The first A Stock units (5004 and 5008) entered passenger service beginning with the Watford service in June 1961. The Amersham/Chesham services began later that year. London Transport later ordered a further 27 trains, which became known as the A62 Stock. This second batch were introduced between 1961–63 to replace the F and P Stocks on the Uxbridge service. Both batches were built by Cravens of Sheffield. By December 1963, the roll-out was complete.
The trains were designated as the A Stock to mark the electrification of the Metropolitan Line to Amersham. Four-car units of A Stock were also used on the East London Line (then a branch of the Metropolitan Line) between June 1977 to April 1985, May 1987 to 24 March 1995 and from 25 March 1998 until the line closed permanently on 22 December 2007. It is now part of the London Overground network.
The London Underground A60 and A62 Stocks were mainly designed as a compromise between the needs of longer distance “outer suburban” passengers on the outer reaches of the line and short distance “urban” passengers over part of the heavily used Circle and Hammersmith & City lines. For this reason the trailer cars feature three sets of doors per car.
A distinctive feature of this stock was the use of transverse seating only, which was uncommon on London Underground rolling stock. This is because it was designed for journeys which may last over an hour. Most of the seating was of the high capacity 3 + 2 arrangement, oriented across the car's width as opposed to a longitudinal layout, where seats were arranged along the sides of the carriage. In addition, four tip-up seats were provided at the rear of the driving motor. Nevertheless, despite each 8-car train seating 448 passengers, these trains provided fewer seats than the locomotive-hauled and T stock trains that they replaced: however, the A Stock provided more seats than their replacement, the S Stock, which started to replace them from 31 July 2010. For the convenience of long-distance passengers, the A stock was also equipped with luggage racks and umbrella hooks. It was the only stock on the system to have these features, despite their presence on most contemporary National Rail trains.
The A60 and A62 stocks were nearly identical by appearance. The most significant differences were the border around the destination window on the A62 motor cars and make of the compressor fitted under the trailer cars: the A60 cars use the Westinghouse DHC 5A type, while the A62 cars use the Reavell TBC 38Z type.
At 116 in (2,900 mm) these were London Underground's widest trains. The trains were refurbished between 1993 and 1998 by Adtranz (now Bombardier) Derby. Car end windows were installed, the seating was reupholstered, and the livery was updated. At the time of refurbishment the Metropolitan line had a low priority for receiving new trains.
Each unit consisted of four cars: two powered driving motors at each end and two non-powered trailers in between. Each unit was further divided into two sets, consisting of a driving motor and trailer that are semi-permanently coupled. Although the intention was to operate trains of only four cars in the off-peak, this practice was short lived, except for the Chalfont & Latimer-Chesham shuttle which was always operated by a single four car unit. For its main services the A Stock operated in a two-unit formation of eight cars on the Metropolitan Line, between Aldgate and Amersham, Chesham (peak hours only), Uxbridge and Watford stations.
When built they had a top speed of 70 mph (110 km/h) (world's fastest 4-rail train), but from the late 1990s/early 2000s they were restricted to 50 mph (80 km/h) to improve reliability. However they still had the highest top speed of any stock on the London Underground network. During the farewell tour on 29 September 2012, the 8 car train was unofficially recorded as travelling at 74 mph (119 km/h).
On the 29th September 2012, London Underground held the final trip for members of the public to travel onboard an A stock trains. The tour was organized by the London transport museum. Its started off at Moorgate and traveled across the entire Metropolitan line including Watford, Amersham, Aldgate, Uxbridge, Chesham and the Watford curve! The tour ended at Wembley Park and on the final stretch from Finchley road the trains was recorded at 74mph on several mobile phones!
Cars of the A Stock were identified by a four-digit number. The first digit identifies the type of car (driver or trailer) and the last three digits identify the set number (Numbers 000 to 231). The numbering system of the A stock upon introduction were as follows:
|Sub-type||Driving Motors (DM)||Trailers (T)|
|A60||5000 to 5123||6000 to 6123|
|A62||5124 to 5231||6124 to 6231|
|Citation: Hardy 2002, p. 36|
In further detail:
|Renumbered - unit exists, number withdrawn (x23x )|
|(original unit) Scrapped before 2010|
|Scrapped after the introduction of the S Stock|
|Rail Adhesion Train (not in service)|
^ operational DM
+ Replaced/formed with a renumbered car
|A DM||T||D DM||A DM||T||D DM||A DM||T||D DM||A DM||T||D DM||A DM||T||D DM||A DM||T||D DM|
|A DM||T||D DM||A DM||T||D DM||A DM||T||D DM||A DM||T||D DM||A DM||T||D DM||A DM||T||D DM|
a. 5034 and 5008 swapped number on July 1985. The new 5008 and 6008 later became (set) No.234 on September 1994, 5034 preserved at the LTM, Acton.
b. No.9 renumbered No.235 on September 1994.
c. No.28 renumbered No.232 on June 1985.
d. 5036 renumbered 5116 on April 1993. Original 5116 scrapped 1987 (collision Kilburn, December 1984)
e. No.117 renumbered No.233 on August 1985; No.37 renumbered No.117 on April 1993.
f. 5208 renumbered 5218 on August 1992. Original 5218 scrapped 1994 (experimental suspension)
g. 5209 renumbered 5121 on March 1993. Original 5121 scrapped 1994 (collision Neasden depot, October 1986)
Converted works vehicles:
s. Sandite dispenser car.
1. Underground News (London Underground Railway Society) (588): 737. December 2010.
2. Underground News (London Underground Railway Society) (591). March 2011.
The A60 Stock reached 50 years of service on 12 June 2011 The age of the fleet made spare parts harder to obtain and vehicles had to be cannibalised to keep the rest of the fleet in operation.
The S8 Stock replaced the fleet. The first S8 Stock unit was introduced on 31 July 2010. Although similar to the S7 Stock which will be used on the District, Circle and Hammersmith & City lines, the main differences were the layout and quantity of seats and the provision of two active sand hoppers for each rail due to the different conditions at the country end of the line. The withdrawal of the A Stock after the introduction of the S8 Stock commenced on 9 and 10 October 2010.
The last train formed of A Stock ran in passenger service on 26 September 2012 before permanent withdrawal. It was formed of 5034 + 5062. The same train formation was also used on 29 September 2012 for the final ticket-only railtour. Thus, one of the driving motor cars, 5034, was part of the first (as 5008, subsequently renumbered as 5034) and also the last A Stock train on the Metropolitan Line, giving it an in service life of over 51 years. It was eventually sent to the Northwood sidings on 8 October 2012 and subsequently loaded on trucks to be scrapped. Only 5034 was taken to the Acton Museum Depot to be preserved.
An ITV News report stated that a carriage, later identified as 5034, would be preserved by the London Transport Museum. The A Stock outlasted many former British Rail EMUs: the Scottish Class 303 managed 43 years, the Class 309 Clacton Express units managed 38 years whilst the former British Rail Class 312 sets only managed 28 years. The former Southern Region 4CIG and 4CEP units have come closer with the former managing 46 years and the latter managing 49 years. This makes the A Stock one of Britain's longest serving types of train, although far from the ex-1938 Stock which is still in use on the Isle of Wight around 75 years after construction, or the 81 years of service given by the former Glasgow Underground rolling stock between 1896 and 1977. As an additional note, the A Stock may be outlasted by the InterCity 125 HSTs.
- Rolling Stock Information Sheets, Transport for London, March 2007, pp. 16–17, retrieved 23 September 2010
- Hardy, Brian (1988). London Underground Rolling Stock (11th ed.). Capital Transport. p. 35. ISBN 0904711943.
- Hardy, Brian (2002). London Underground Rolling Stock (15th ed.). p. 36. ISBN 1854142631. "The first train of A60 stock entered passenger service on 12 June 1961 (units 5004 and 5008)."
- Metropolitan Line No 2 Section Working Timetable No 189 12.6.61 (Working Timetable), London Underground, 1961
- Glancey, Jonathan (2007-10-22). "Classics of everyday design No 33". London: The Guardian. Retrieved 2010-05-11.
- Hardy 2002, p. 36
- "A60/62 stock". SQUAREWHEELS.org.uk. Retrieved 20 December 2010.
- Hardy 2002, p. 37
- "'A' Stock". Transport for London. Retrieved 20 December 2010.
- Mugridge, Peter (8 August 2012). "Tube's A-listers bow out". Rail (Bauer Media) (702): 54–59. ISSN 0953-4563.
- "London Underground Rolling Stock Dimensions". London Underground. Retrieved 2008-04-03.
- Bayman, Bob (2008), London Underground: Official Handbook (6th ed.), Capital Transport, p. 33, ISBN 978-1-85414-317-4
- Hardy 2002, p. 98
- Underground News (London Underground Railway Society) (585): 516–517. September 2010. ISSN 0306-8617.
- Underground News (London Underground Railway Society) (584): 440A–444A. August 2010. ISSN 0306-8617.
- "Metropolitan Line luggage racks". Retrieved 2 March 2012.
- "A Stock last day on the Metropolitan Line". Railways Today. 26 September 2012. Retrieved 2 November 2012.
- "Saying goodbye to oldest tube train". London Tonight - ITV London. 26 September 2012. Retrieved 28 September 2012.
|Wikimedia Commons has media related to: London Underground A60 and A62 stock|
- A60/62 stock (SquareWheels)