British Rail Class 27

BRCW Type 2 British Rail Class 27
A Class 27 at Carlisle.
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
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.
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)
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.^[1]