British Rail Class 47

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Brush Type 4
British Rail Class 47
Two Class 47s, Nos. 47424 and 47607, at Bangor station with a passenger train in 1987
Power type Diesel-electric
Builder Brush Traction and British RailwaysCrewe Works
Build date 1963–1968
Total production 512
Configuration Co-Co
UIC classification Co'Co'
Gauge ft 8+12 in (1,435 mmstandard gauge
Wheel diameter 3 ft 9 in (1.143 m)
Wheelbase 51 ft 6 in (15.70 m)
Length 63 ft 7 in (19.38 m)
Width 8 ft 10 in (2.69 m)
Height 12 ft 9 12 in (3.90 m)
Locomotive weight 112 long tons (114 t) to 125 long tons (127 t)
Fuel capacity 850 imp gal (3,900 l; 1,020 US gal)
Prime mover Sulzer 12LDA28-C
Multiple working Not fitted when built. Some now retrofitted with Green Circle
Top speed 75 mph (121 km/h) or 100 mph (160 km/h)
Power output Engine: originally 2,750 bhp (2,050 kW), later derated to 2,580 bhp (1,920 kW)
Tractive effort Maximum: 55,000 lbf (245 kN) to 60,000 lbf (267 kN)
Train heating 47/0: Steam generator
47/3: None
47/4: Electric Train Heat
Locomotive brakeforce 61 long tons-force (608 kN)
Train brakes Vacuum, Air, or dual
Career British Railways
Number D1500–D1999, D1100–D1111; later 47001–47981
Axle load class Route availability 6 or 7

The British Rail Class 47 (Originally Brush Type 4) is a class of British railway diesel-electric locomotive that was developed in the 1960s by Brush Traction. A total of 512 Class 47s were built at Crewe Works and Brush's Falcon Works, Loughborough between 1962 and 1968, which made them the most numerous class of British mainline diesel locomotive.

They were fitted with the Sulzer 12LDA28C twin-bank twelve-cylinder unit producing 2,750 bhp (2,050 kW) (later derated to 2580 bhp to improve reliability), and have been used on both passenger and freight trains on Britain's railways for over 40 years. Despite the introduction of more modern types of traction, as of 2008 a significant number are still in use, both on the mainline and on heritage railways. As of December 2008, 103 locomotives are still extant, with 29 working on the mainline.