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The reference for locomotives and railcars

South Australian class H

Australia 1870 9 produced
PD

The class H was a 4-4-0 goods locomotive designed for work on the line between Roseworthy and Burra-Burra that was limited to light axle loads. It used the same boiler as the 2-4-0 of the class C, but had less load on the individual axles due to the bogie at the front. The first three were built by Robert Stephenson & Co. in 1870, but their good performances led to three more orders which brought the total to nine. From 1886, they were replaced by the 4-6-0 class R on their original line and were transferred to another line. One was withdrawn in 1888, but the SAR has already begun to rebuild all others in 1880. The rebuilding process was completed in 1910 and seven members of the class survived until the twenties. More withdrawals followed and the last one was gone by 1930.

Technical data

General

Built
1870-1877
Manufacturers
Robert Stephenson & Co.
Wheel arrangement
4-4-0 (American)
Gauge
1,600 mm (Irish broad gauge)

Dimensions and weights

Length
13.56 m
Wheelbase
5.49 m
Service mass
26.6 t
Adhesion mass
17.9 t
Total mass
44.7 t
Rigid wheelbase
2.29 m
Axle load
8.9 t
Water capacity
4,819 l
Fuel capacity
3.8 t (coal)

Boiler

Grate area
1.18 m²
Firebox surface
6.791 m²
Tube heating surface
72.52 m²
Evaporative heating surface
79.311 m²
Total heating surface
79.3 m²

Power plant

Driver diameter
1,372 mm
Boiler pressure
9 bar
Expansion type
simple expansion
Cylinders
two, 356 x 508 mm

Power

Power source
steam
Estimated power
168 kW (228 PS)
Starting effort
35.7 kN

Calculated values

Factor of adhesion
1 : 4.92
Optimal speed
29 km/h
Power-to-weight ratio
6.3 kW/t
Heating Surface Equivalent
113.3 m²
Cylinder volume/HSE
1 : 890.86
Adhesive weight/Total
1 : 1.49
Tractive force/Heating surface
1 : 9.40
Grate area/Heating surface
1 : 67.21
Firebox/Tube surface
1 : 10.68
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