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The reference for locomotives and railcars

Sudan Railways class 180

Sudan 1924 10 produced
Locomotive Magazine, June 1924

In 1924, the Sudan Government Railways received ten Mikados from Robert Stephenson & Co. and numbered them 180 to 189. They were designed by C.G. Hodgson and compared to the Mikados delivered by North British in 1921, they were lighter and had a smaller boiler. They had outside Walschaerts valve gear, a superheater and a Weir feed water pump. While the third driving axle had no wheel flanges, the flanges on the second driving axle had been made thinner. These locomotives were used on the Kassala Line that was also opened in 1924 and connected Kassala with Port Sudan. With a length of 216 miles and 63 bridges, the Kassala Cotton Co. had contributed a large part of the construction costs.

Technical data

General

Built
1924
Manufacturers
Robert Stephenson & Co.
Wheel arrangement
2-8-2 (Mikado)
Gauge
1,067 mm (Cape gauge)

Dimensions and weights

Wheelbase
8.56 m
Total wheelbase
16.21 m
Service mass
62.1 t
Adhesion mass
44.5 t
Total mass
111.1 t
Rigid wheelbase
4.27 m
Axle load
11.2 t
Water capacity
18,185 l
Fuel capacity
8.1 t (coal)

Boiler

Grate area
2.415 m²
Firebox surface
14.4 m²
Tube heating surface
93.832 m²
Evaporative heating surface
108.232 m²
Superheater surface
24.155 m²
Total heating surface
132.4 m²

Power plant

Driver diameter
1,295 mm
Boiler pressure
11.4 bar
Expansion type
simple expansion
Cylinders
two, 483 x 610 mm

Power

Power source
steam
Estimated power
746 kW (1,014 PS)
Starting effort
106.0 kN

Calculated values

Factor of adhesion
1 : 4.11
Optimal speed
43 km/h
Power-to-weight ratio
12.0 kW/t
Heating Surface Equivalent
228.5 m²
Cylinder volume/HSE
1 : 975.83
Adhesive weight/Total
1 : 1.40
Tractive force/Heating surface
1 : 16.72
Grate area/Heating surface
1 : 54.82
Firebox/Tube surface
1 : 6.52
Total/Superheater
1 : 4.48
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