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Nigerian Railways class 74
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 ...
General
| Property | Nigerian Railways class 74Remove |
|---|---|
| Built | 1946, 1949, 1955 |
| Manufacturers | Hunslet |
| Wheel arrangement | 0-8-0TT (Eight-coupled) |
| Gauge | 1,067 mm (Cape gauge) |
Dimensions and weights
| Property | Nigerian Railways class 74Remove |
|---|---|
| Wheelbase | 4.09 m |
| Rigid wheelbase | 4.09 m |
| Service weight | 49.4 t |
| Adhesive weight | 49.4 t |
| Axle load | 12.4 t |
| Water capacity | 4,546 l |
| Fuel capacity | 2 t (coal) |
Boiler
| Property | Nigerian Railways class 74Remove |
|---|---|
| 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
| Property | Nigerian Railways class 74Remove |
|---|---|
| Driver diameter | 1,086 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | simple expansion |
| Cylinders | two, 457 x 584 mm |
Power
| Property | Nigerian Railways class 74Remove |
|---|---|
| Power source | steam |
| Estimated power | 298 kW (405 PS) |
| Starting effort | 118.6 kN |
Calculated values
| Property | Nigerian Railways class 74Remove |
|---|---|
| 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 |
