British Rail Class 311

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British Rail Class 311
Unit 311104 in blue/grey livery awaiting passengers at Partick.
In service1967 - 1999
Number built19
Formation3 cars per trainset
Capacity236 seats
Operator(s)British Rail
Maximum speed75mph (121km/h)
WeightTotal - 129 tons
Braking system(s)Air (Auto/EP)
Track gauge1,435 mm (4 ft 8 12 in)

The British Rail Class 311 alternating current (AC) electric multiple units (EMU) were built by Cravens at Sheffield in 1967. They were intended for use on the line from Glasgow Central to Gourock and Wemyss Bay, which was electrified in 1967.