The British Rail Class 332 (originally Class 331) were electric multiple unit passenger trains used on the Heathrow Express. These trains went from London Paddington station to Heathrow Airport. There were 14 trains which had four or five carriages each. They were built in 1998 by CAF with traction equipment supplied by Siemens Transportation Systems at a factory in Zaragoza, Spain.
Quick facts In service, Manufacturer ...
| British Rail Class 332 |
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 Interior of a refurbished standard class carriage |
| In service | 19 January 1998 – 28 December 2020 |
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| Manufacturer | CAF |
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| Built at | Zaragoza, Spain |
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| Constructed | - 1997–1998
- 2002 (5 additional cars)
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| Refurbished | 2012–2013[1] |
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| Scrapped | 2020–2021 |
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| Number built | 14 |
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| Number preserved | |
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| Number scrapped | 13 |
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| Successor | Class 387 |
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| Formation | - 9 × 4-car units
- 5 × 5-car units
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| Fleet numbers | 332001–332014 |
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| Capacity | - 4 cars: 203 seats
- 5 cars: 267 seats
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| Owners | Heathrow Airport Holdings |
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| Operators | Heathrow Express |
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| Depots | Old Oak Common (London) |
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| Car body construction | Steel |
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| Car length | - End cars:
- 22.95 m (75 ft 4 in)
- Intermediate cars:
- 22.9 m (75 ft 2 in)
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| Width | 2.73 m (8 ft 11 in) |
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| Height | 3.77 m (12 ft 4 in) |
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| Maximum speed | 109 mph (176 km/h) |
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| Weight | - 4 cars: 173 t (170 long tons; 191 short tons)
- 5 cars: 208 t (205 long tons; 229 short tons)
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| Power output | 1,400 kW (1,900 hp)[2] |
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| Acceleration | 1 m/s2 (2.2 mph/s)[2] |
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| Electric system(s) | 25 kV 50 Hz AC overhead |
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| Current collector(s) | Pantograph |
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| Safety system(s) | |
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| Coupling system | Scharfenberg Type 10[3] |
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| Multiple working | Within class |
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| Track gauge | 1,435 mm (4 ft 8 1⁄2 in) standard gauge |
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