Emu Bay No. 6 to 8
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No. 7 was withdrawn in 1961, while the others were put into touristic and general passenger service again.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.
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