British Rail Class 306

British Rail Class 306
British Rail Class 306
	Class 306 at Liverpool Street in 1975
In service	1949–1981
Manufacturers	Metro Cammell and BRCW
Order nos.	363: 65201–65292; 364: 65401–65492; 365: 65601–65692;
Constructed	1949
Refurbished	Rebuilt 1959–1961
Number built	92 trainsets
Number scrapped	91
Formation	3 cars per trainset. As built: DMBSO+TSO+DTSO; As rebuilt: DMSO+TBSO+DTSO;
Diagram	BR TOPS codes; rebuilt units; EA203 DMSO; EE211 DTSO; EJ201;
Design code	AM6
Fleet numbers	306001–306092 (sets); 65201–65292 (DMBSO later DMSO); 65401–65492 (TSO later TBSO); 65601–65692 (DTSO);
Capacity	48S (DMBS0) rebuilt 62S (DMSO); 68S (TSO) rebuilt 46S (TBSO); 60S (DTSO);
Operator	British Rail
Depot	Ilford
Lines served	Liverpool Street–Shenfield, Great Eastern Suburban
Specifications
Car body construction	Steel
Train length	177 ft 7 in (54.13 m)
Car length	60 ft 4+1⁄4 in (18.396 m) (DMSO); 55 ft 0+1⁄2 in (16.777 m) (TBSO); 55 ft 4+1⁄4 in (16.872 m) (DTSO);
Width	9 ft 3 in (2.82 m)
Height	13 ft 1 in (3.99 m)
Doors	Bi-parting sliding
Articulated sections	3
Maximum speed	75 mph (121 km/h)
Weight	105 long tons (107 t; 118 short tons) (total); 51.7 t (50.9 long tons; 57.0 short tons) (DMSO); 26.4 t (26.0 long tons; 29.1 short tons) (TBSO); 27.9 t (27.5 long tons; 30.8 short tons) (DTSO);
Traction motors	4 × Crompton Parkinson
Power output	4 × 157 hp (117 kW)
Electric systems	1500 V DC Overhead line (original); 6.25 kV and 25 kV 50 Hz AC Overhead line (rebuilt);
Current collection	Pantograph
UIC classification	Bo′Bo′+2′2′+2′2′
Bogies	Thompson / LNER ED6 / ET6
Braking system	Air (EP/Auto)
Safety system	AWS
Coupling system	Screw
Multiple working	Within class
Track gauge	4 ft 8+1⁄2 in (1,435 mm)

View of the former Motor Brake Second Open (MBSO) vehicle showing the modified (raised) roofline above the cab when the pantograph was relocated to the centre carriage

A side view of the centre carriage showing the Stone Faiveley AMBR pantograph and the guards' section below

The British Rail Class 306 was a fleet of electric multiple unit (EMU) trains introduced in 1949. It consisted of 92 three-car trains which were used on the Great Eastern Main Line between Shenfield and London Liverpool Street.