Nigerian Railways class 74
Nigeria 1946 33 produced
In 1946, Hunslet built eleven eight-coupled shunters for the Nigerian Railways. They had both side tanks and an additional tender. The cylinders measured 18 by 23 inches, with drivers of 42.75 inches. The first batch carried the running numbers 74 to 84. Numbers 85 to 100 followed in 1949 and finally, numbers 51 to 56 were built in 1955. Works numbers were 3345 to 3355 for the first batch, 3552 to 3555 and 3625 to 3636 for the two batches of 1949 and 3857 to 3862 for the last one.
Technical data
General
- Built
- 1946, 1949, 1955
- Manufacturers
- Hunslet
- Wheel arrangement
- 0-8-0TT (Eight-coupled)
- Gauge
- 1,067 mm (Cape gauge)
Dimensions and weights
- Wheelbase
- 4.09 m
- Service mass
- 49.4 t
- Adhesion mass
- 49.4 t
- Rigid wheelbase
- 4.09 m
- Axle load
- 12.4 t
- Water capacity
- 4,546 l
- Fuel capacity
- 2 t (coal)
Boiler
- Grate area
- 1.24 m²
- Firebox surface
- 8.64 m²
- Tube heating surface
- 73.486 m²
- Evaporative heating surface
- 82.126 m²
- Total heating surface
- 82.1 m²
Power plant
- Driver diameter
- 1,086 mm
- Boiler pressure
- 12.4 bar
- Expansion type
- simple expansion
- Cylinders
- two, 457 x 584 mm
Power
- Power source
- steam
- Estimated power
- 298 kW (405 PS)
- Starting effort
- 118.6 kN
Calculated values
- Factor of adhesion
- 1 : 4.08
- Optimal speed
- 16 km/h
- Power-to-weight ratio
- 6.0 kW/t
- Heating Surface Equivalent
- 125.3 m²
- Cylinder volume/HSE
- 1 : 1,530.57
- Adhesive weight/Total
- 1 : 1.00
- Tractive force/Heating surface
- 1 : 30.17
- Grate area/Heating surface
- 1 : 66.23
- Firebox/Tube surface
- 1 : 8.51
