Staatsspoorwegen 2-6-2 Locomotives in Indonesia

Class Details by Steve Llanso of Sweat House Media

Class C30 (Locobase 4740)

Data from and, a site for the Ambarawa Railway Museum maintained by Rob Dickinson that shows 69.6 sq m for the heating surface, 26.3 sq m for the superheater. Locobase suspects that the differences represent different builders (Dickinson's example was a Werkspoor product.)

See Indra Krishnamurti at [] for building dates and numbers both of predecessor railways and the Indonesian State Railways.

46 Prairie tanks arrived from several builders over a two-year period. Borsig (11), Hanomag (12), Hohenzollern (12), and Werkspoor (11).

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID4740
Number in Class46
Road Numbers
Number Built46
Valve Gear
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)69,666 / 31,600
Engine Weight (lbs / kg)109,790 / 49,800
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)109,790 / 49,800
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)39 / 19.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)53.10 / 1350
Boiler Pressure (psi / kPa)171.10 / 11.80
High Pressure Cylinders (dia x stroke) (in / mm)16.73" x 23.62" / 425x600
Tractive Effort (lbs / kg)18,107 / 8213.21
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.85
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)17.86 / 1.66
Evaporative Heating Surface (sq ft / m2)735 / 68.30
Superheating Surface (sq ft / m2)269 / 25
Combined Heating Surface (sq ft / m2)1004 / 93.30
Evaporative Heating Surface/Cylinder Volume122.30
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3056
Same as above plus superheater percentage3881
Same as above but substitute firebox area for grate area
Power L1
Power MT

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