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The reference for locomotives and railcars

Emu Bay No. 6 to 8

Australia 1900 3 produced
Donald Chisholm-Smith collection

Numbers 6 to 8 of the Emu Bay Railway in Tasmania were 4-8-0 locomotives built in 1900 by Dübs with the works numbers 3864 to 3866. With the consulting engineer being David Jones from the Highland Railway, the locomotives had a distinct Scottish appearance. They had to provide goods service over the line with a ruling grade of 2.5 percent and tight curves. A rigid wheelbase of 8 ft 4 in with a driver diameter of 3 ft 9 in indicates that one of the driving axles, most likely the last one, had lateral play. Boiler pressure was initially 150 psi, but was later increased to 175 psi. 

No. 7 was withdrawn in 1961, while the others were put into touristic and general passenger service again. For this they were converted to burn oil and received smoke deflectors. 6 was named “Murchison” and 8 was named “Heemskirk”. In 1966, they went into preservation. Now 6 is on display at the Zeehan West Coast Heritage Museum, while 8 went into service on the Don River Railway.

No. 8 on the Don River Railway in February 1998 Adrian Maggs

Technical data

General

Built
1900
Manufacturers
Dübs
Wheel arrangement
4-8-0 (Twelve-wheeler)
Gauge
1,067 mm (Cape gauge)

Dimensions and weights

Wheelbase
6.72 m
Total wheelbase
13.32 m
Service mass
48.3 t
Adhesion mass
38.2 t
Total mass
73.4 t
Rigid wheelbase
2.54 m
Axle load
10.8 t
Water capacity
9,093 l
Fuel capacity
3.6 t (coal)

Boiler

Grate area
1.486 m²
Firebox surface
10.475 m²
Tube heating surface
99.629 m²
Evaporative heating surface
110.104 m²
Total heating surface
110.1 m²

Power plant

Driver diameter
1,143 mm
Boiler pressure
10.3 bar
Expansion type
simple expansion
Cylinders
two, 444 x 559 mm

Power

Power source
steam
Estimated power
373 kW (507 PS)
Starting effort
84.9 kN

Calculated values

Factor of adhesion
1 : 4.41
Optimal speed
27 km/h
Power-to-weight ratio
7.7 kW/t
Heating Surface Equivalent
162.5 m²
Cylinder volume/HSE
1 : 1,067.39
Adhesive weight/Total
1 : 1.27
Tractive force/Heating surface
1 : 16.11
Grate area/Heating surface
1 : 74.09
Firebox/Tube surface
1 : 9.51
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