British Rail Class 27

Specifications
Specifications
Configuration:;
• UIC	Bo'Bo'
• Commonwealth	Bo-Bo
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Wheel diameter	3 ft 7 in (1.092 m)
Minimum curve	5 chains (100 m)
Wheelbase	39 ft 0 in (11.89 m)
Length	50 ft 9 in (15.47 m)
Width	8 ft 10 in (2.69 m)
Height	12 ft 8 in (3.86 m)
Loco weight	Originally: 72.50 long tons (73.7 t; 81.2 short tons); 71–76 tonnes (70–75 long tons; 78–84 short tons)
Fuel capacity	685 imp gal (3,110 L; 823 US gal)
Prime mover	Sulzer 6LDA28-B
Generator	DC
Traction motors	four GEC WT459 DC traction motors
Transmission	Diesel electric
MU working	★ Blue Star
Train heating	As built, Steam generator; subclass 27/2, Electric Train Heating, Houchin 120 kW (160 hp) alternator powered by Deutz 8-cylinder air-cooled diesel engine, type F8L413
Train brakes	Initially 14 dual-braked, 10 fitted with additional air brakes later on. Remainder vacuum only.

Type and origin
Type and origin
Power type	Diesel-electric
Builder	Birmingham Railway Carriage and Wagon Company
Serial number	DEL190–DEL258
Build date	1961–1962
Total produced	69

BRCW Type 2
British Rail Class 27
BRCW Type 2; British Rail Class 27
	A Class 27 at Carlisle.
Power type
Type and origin
Power type	Diesel-electric
Builder	Birmingham Railway Carriage and Wagon Company
Serial number	DEL190–DEL258
Build date	1961–1962
Total produced	69
Configuration:;
Specifications
Configuration:;
• UIC	Bo'Bo'
• Commonwealth	Bo-Bo
Gauge	4 ft 8+1⁄2 in (1,435 mm) standard gauge
Wheel diameter	3 ft 7 in (1.092 m)
Minimum curve	5 chains (100 m)
Wheelbase	39 ft 0 in (11.89 m)
Length	50 ft 9 in (15.47 m)
Width	8 ft 10 in (2.69 m)
Height	12 ft 8 in (3.86 m)
Loco weight	Originally: 72.50 long tons (73.7 t; 81.2 short tons); 71–76 tonnes (70–75 long tons; 78–84 short tons)
Fuel capacity	685 imp gal (3,110 L; 823 US gal)
Prime mover	Sulzer 6LDA28-B
Generator	DC
Traction motors	four GEC WT459 DC traction motors
Transmission	Diesel electric
MU working	★ Blue Star
Train heating	As built, Steam generator; subclass 27/2, Electric Train Heating, Houchin 120 kW (160 hp) alternator powered by Deutz 8-cylinder air-cooled diesel engine, type F8L413
Train brakes	Initially 14 dual-braked, 10 fitted with additional air brakes later on. Remainder vacuum only.
Maximum speed
Performance figures
Maximum speed	90 mph (145 km/h)
Power output	Engine: 1,250 hp (932 kW) @750 rpm; At rail: 933 hp (696 kW)
Tractive effort	Maximum: 42,000 lbf (187 kN); Continuous: 25,000 lbf (111 kN)
Brakeforce	34 long tons-force (340 kN)
Operators
Career
Operators	British Railways
Numbers	D5347–D5415; later 27001–27066
Axle load class	Route availability 6 (RA 5 from 1969)
First run	1961
Retired	1966, 1975-1987
Disposition	8 preserved, remainder scrapped

British Rail's Class 27 comprised 69 diesel locomotives built by the Birmingham Railway Carriage and Wagon Company (BRCW) during 1961 and 1962. They were a development of the earlier Class 26; both were originally classified as the BRCW Type 2. The Class 27s were numbered D5347-D5415.

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