Nigerian Railways class 801
Nigeria 1925 5 produced
In 1925, Vulcan foundry delivered five Mikados to Nigerian Railways which carried the works numbers 3783 to 3787. Their running numbers were 801 to 805. Additionally they received names, like No. 801 “Sir Hugh Clifford” that can be seen in the works photo. They featured a striking appearance with a long and sleek boiler. This included a Robinson superheater with a surface of 506 square feet, what was more than most locomotives in Britain. They had three cylinders of 18 by 28 inches which led to a starting tractive effort of more than 38,500 pounds.
Technical data
General
- Built
- 1925
- Manufacturers
- Vulcan Foundry
- Wheel arrangement
- 2-8-2 (Mikado)
- Gauge
- 1,067 mm (Cape gauge)
Dimensions and weights
- Wheelbase
- 10.47 m
- Total wheelbase
- 18.48 m
- Service mass
- 89.6 t
- Adhesion mass
- 67.1 t
- Total mass
- 127.9 t
- Rigid wheelbase
- 5.13 m
- Water capacity
- 13,639 l
- Fuel capacity
- 7.6 t (coal)
Boiler
- Grate area
- 3.53 m²
- Firebox surface
- 19.51 m²
- Tube heating surface
- 193.239 m²
- Evaporative heating surface
- 212.748 m²
- Superheater surface
- 47.009 m²
- Total heating surface
- 259.8 m²
Power plant
- Driver diameter
- 1,372 mm
- Boiler pressure
- 12.4 bar
- Expansion type
- simple expansion
- Cylinders
- three, 457 x 711 mm
Power
- Power source
- steam
- Estimated power
- 1,044 kW (1,419 PS)
- Starting effort
- 171.5 kN
Calculated values
- Factor of adhesion
- 1 : 3.84
- Optimal speed
- 37 km/h
- Power-to-weight ratio
- 11.6 kW/t
- Heating Surface Equivalent
- 404.3 m²
- Cylinder volume/HSE
- 1 : 866.35
- Adhesive weight/Total
- 1 : 1.34
- Tractive force/Heating surface
- 1 : 13.79
- Grate area/Heating surface
- 1 : 73.59
- Firebox/Tube surface
- 1 : 9.90
- Total/Superheater
- 1 : 4.53
