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The reference for locomotives and railcars

Durban Harbour “John Milne”

South Africa 1879 1 produced
Factory photo of Hunslet with clearly recognizable manufacturer's plaque

In 1877, a seven-man commission was set up in the colony of Natal for the administration of the port of Durban, which was to coordinate the further development of the systems and processes for the increasing transport volume. Locomotives from the Natal Government Railways were previously used on the port's tracks when required, but no own locomotives existed. For this reason, a single shunting locomotive with a 0-6-0T wheel arrangement was ordered from Hunslet in Leeds, which was delivered in 1879. It was named after John Milne, an engineer who played an important role in the port's history.

The locomotive weighed almost 20 tonnes, carried a maximum of 1,680 pounds of coal in the driver's cab and held 450 gallons of water in a saddle tank. It had 36-inch wheels and a very short wheelbase. It was in service in the port of Durban for many years and was only supplemented by a second locomotive around the turn of the century. It is no longer possible to determine exactly when its service life ended. However, this must have been no later than 1912, since it no longer appeared in the lists of the South African Railways and must therefore have been either sold or scrapped before then.

Technical data

General

Built
1879
Manufacturers
Hunslet
Wheel arrangement
0-6-0ST (Six-coupled)
Gauge
1,067 mm (Cape gauge)

Dimensions and weights

Length
6.38 m
Wheelbase
2.29 m
Service mass
19.9 t
Adhesion mass
19.9 t
Rigid wheelbase
2.29 m
Water capacity
2,044 l
Fuel capacity
0.8 t (coal)

Boiler

Grate area
0.65 m²
Firebox surface
3.623 m²
Tube heating surface
32.795 m²
Evaporative heating surface
36.418 m²
Total heating surface
36.4 m²

Power plant

Driver diameter
914 mm
Boiler pressure
9 bar
Expansion type
simple expansion
Cylinders
two, 305 x 457 mm

Power

Power source
steam
Estimated power
82 kW (111 PS)
Starting effort
35.4 kN

Calculated values

Factor of adhesion
1 : 5.51
Optimal speed
14 km/h
Power-to-weight ratio
4.1 kW/t
Heating Surface Equivalent
54.5 m²
Cylinder volume/HSE
1 : 1,223.48
Adhesive weight/Total
1 : 1.00
Tractive force/Heating surface
1 : 20.30
Grate area/Heating surface
1 : 56.03
Firebox/Tube surface
1 : 9.05
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