Federated Malay States class L
Malayan State Railway class 531
Malaysia 1921 20 produced
To eliminate the need for double-heading express trains, the FMSR ordered 20 Pacifics from Kitson, which were delivered in 1921. They had a superheated boiler with Belpaire firebox and were among the more powerful meter gauge Pacifics.
During World War II, the Japanese brought five of the locomotives to Burma, but they returned after the war ended. They soon became class 531 and some remained in service until 1971. The 531.01 was the only one that was preserved and is now in front of the National Museum in Kuala Lumpur.
Technical data
General
- Built
- 1921
- Manufacturers
- Kitson & Co.
- Wheel arrangement
- 4-6-2 (Pacific)
- Gauge
- 1,000 mm (Meter gauge)
Dimensions and weights
- Length
- 17.17 m
- Service mass
- 89.8 t
- Adhesion mass
- 36.6 t
- Total mass
- 56.5 t
- Rigid wheelbase
- 2.87 m
- Axle load
- 12.2 t
- Water capacity
- 11,364 l
- Fuel capacity
- 6.1 t (coal)
Boiler
- Grate area
- 2.258 m²
- Evaporative heating surface
- 137.961 m²
- Total heating surface
- 138.0 m²
Power plant
- Driver diameter
- 1,372 mm
- Boiler pressure
- 12.4 bar
- Expansion type
- simple expansion
- Cylinders
- two, 432 x 610 mm
Power
- Power source
- steam
- Estimated power
- 746 kW (1,014 PS)
- Starting effort
- 87.4 kN
Calculated values
- Factor of adhesion
- 1 : 4.10
- Optimal speed
- 51 km/h
- Power-to-weight ratio
- 8.3 kW/t
- Adhesive weight/Total
- 1 : 2.46
- Tractive force/Heating surface
- 1 : 13.23
- Grate area/Heating surface
- 1 : 61.10
