British Rail Class 44

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Derby Type 4
British Rail Class 44
Class 44 loco.jpg
Preserved Class 44 number D8 at Rowsley South, on Peak Rail
Type and origin
Power type Diesel-electric
Builder British RailwaysDerby Works
Total produced 10
Specifications
Configuration:
 • Whyte 1Co-Co1
 • UIC (1Co)'(Co1)'
Gauge 4 ft 8 12 in (1,435 mm) standard gauge
Wheel diameter 3 ft 9 in (1.143 m)
Minimum curve 5 chains (100 m)
Wheelbase 59 ft 8 in (18.19 m)
Length 67 ft 11 in (20.70 m)
Width 8 ft 10 12 in (2.71 m)
Height 12 ft 10 in (3.91 m)
Loco weight 133 long tons (135 t)
Fuel capacity 840 imp gal (3,800 l; 1,010 US gal)
Prime mover Sulzer 12LDA28-A
MU working Blue Star
Train heating Steam generator
Train brakes Vacuum
Performance figures
Power output Engine: 2,300 bhp (1,715 kW)
At rail: 1,800 hp (1,342 kW)
Tractive effort Maximum: 50,000 lbf (222 kN)
Brakeforce 63 long tons-force (628 kN)
Career
Railroad(s) British Railways
Number D1–D10; later 44001–44010
Nicknames ‘Peak’
Axle load class Route availability 7

The British Rail Class 44 or Sulzer Type 4 diesel locomotives were built by British Railways' Derby Works between 1959 and 1960. They were named after British mountains, and were then nicknamed Peaks.