British Rail Class 321 | |
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In service | 1988–present[1] |
Manufacturer | British Rail Engineering Limited |
Built at | Holgate Road Works, York |
Family name | BR Second Generation (Mark 3) |
Replaced | Class 307 |
Constructed | 1988–1991 |
Refurbished | 2013–2017 |
Number built | 117 (66 × 321/3, 48 × 321/4, and 4 × 321/9)[2] |
Number in service | 8 (plus 12 converted to Cl. 320/4) |
Number scrapped | 67 |
Successor | |
Formation |
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Diagram | (See § Vehicle numbering) |
Fleet numbers |
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Capacity |
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Owners |
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Operators | |
Specifications | |
Car body construction | Steel |
Train length | 80.92 m (265 ft 6 in)[1] |
Car length |
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Width | 2.816 m (9 ft 2.9 in) |
Height | 3.775 m (12 ft 4.6 in) |
Doors | Double-leaf sliding pocket, each 1.200 m (3 ft 11.2 in) wide (2 per side per car) |
Wheelbase | Over bogie centres: 14.170 m (46 ft 5.9 in) |
Maximum speed | 100 mph (161 km/h) |
Weight |
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Traction motors | |
Power output |
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Acceleration | |
Electric system(s) | 25 kV 50 Hz AC overhead |
Current collector(s) | Pantograph |
UIC classification | 2′2′+Bo′Bo′+2′2′+2′2′ |
Bogies |
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Minimum turning radius | 71 m (232 ft 11 in) |
Braking system(s) | Electro-pneumatic (disc) |
Safety system(s) | |
Coupling system | Tightlock |
Multiple working | With Classes 317–322 |
Track gauge | 1,435 mm (4 ft 8+1⁄2 in) standard gauge |
Notes/references | |
Specifications as at October 1988[7] except where otherwise noted. |
The British Rail Class 321 is a class of electric multiple unit (EMU) passenger train built by British Rail Engineering Limited's York Carriage Works in three batches between 1988 and 1991 for Network SouthEast and Regional Railways. The class uses alternating current (AC) overhead electrification. The design was successful and led to the development of the similar Class 320 and Class 322.
After operating for various trains operating companies after the privatisation of British Rail, they were latterly operated by Greater Anglia until April 2023. Some have been converted to Class 320 and are operated by ScotRail.
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