Ceylon Government Railways class D3
Sri Lanka 1907 22 produced
The class D3 consisted of 22 2-6-4T tank locomotives built by Robert Stephenson & Co. between 1907 and 1914. They were built for suburban services on the coast line south of Colombo. To ensure sufficient acceleration with trains of up to 14 coaches, the drivers had a diameter of only five feet. When they were superheated, they became class D2. Twelve were rebuilt into class D1 in 1930. The five original class D1 locomotives had been delivered by Robert Stephenson & Co. in 1928.
Technical data
General
- Built
- 1907-1914
- Manufacturers
- Robert Stephenson & Co.
- Wheel arrangement
- 2-6-4T (Adriatic)
- Gauge
- 1,676 mm (Indian broad gauge)
Dimensions and weights
- Wheelbase
- 9.91 m
- Empty mass
- 57.5 t
- Service mass
- 72.7 t
- Adhesion mass
- 42.2 t
- Rigid wheelbase
- 3.66 m
- Axle load
- 14.1 t
- Water capacity
- 7,957 l
- Fuel capacity
- 3.6 t (coal)
Boiler
- Grate area
- 2.183 m²
- Evaporative heating surface
- 122.911 m²
- Total heating surface
- 122.9 m²
Power plant
- Driver diameter
- 1,524 mm
- Boiler pressure
- 11 bar
- Expansion type
- simple expansion
- Cylinders
- two, 483 x 660 mm
Power
- Power source
- steam
- Estimated power
- 522 kW (710 PS)
- Starting effort
- 94.6 kN
Calculated values
- Factor of adhesion
- 1 : 4.37
- Optimal speed
- 34 km/h
- Power-to-weight ratio
- 7.2 kW/t
- Adhesive weight/Total
- 1 : 1.73
- Tractive force/Heating surface
- 1 : 16.08
- Grate area/Heating surface
- 1 : 56.30
