Malang Stoomtram Mij / Modjokerto Stoomtram Mij 0-4-0 Locomotives in Indonesia


Class Details by Steve Llanso of Sweat House Media

Class B17 (Locobase 4713)

Data from Dr Jonathan Smith, []; tables don't separate EHS and SHS.

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

"Tram" engines substituted for electric trolleys in many parts of Indonesia. The B17s had a boiler completely enclosed by a cab and low side tanks to shield pedestrians from the running gear. Photographs in Ziel and Eagleson (1973) suggest that the passenger trams had an engine coupled to each end.


Class B21 (Locobase 4715)

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

One of several classes of light tram motive-power units. These consisted of a steam locomotive enclosed in a body that had low side tanks to shield pedestrians from the running gear. Photographs in Ziel and Eagleson (1973) suggest that the passenger trams had an engine coupled to each end.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassB17B21
Locobase ID4713 4715
RailroadMalang Stoomtram MijModjokerto Stoomtram Mij
CountryIndonesiaIndonesia
Whyte0-4-0T0-4-0T
Number in Class108
Road NumbersMS 1-MS 13/B1701-17101, 5-10/B2101-B2108
Gauge3'6"3'6"
Number Built108
BuilderHohenzollernKrauss
Year18971899
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)44,092 / 20,00035,274 / 16,000
Engine Weight (lbs / kg)44,092 / 20,00035,274 / 16,000
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)37 / 18.5029 / 14.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)33.50 / 85031.90 / 810
Boiler Pressure (psi / kPa)203 / 14170.70 / 11.80
High Pressure Cylinders (dia x stroke) (in / mm)10.63" x 15.75" / 270x40010.45" x 15.75" / 265x400
Tractive Effort (lbs / kg)9167 / 4158.097823 / 3548.46
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.81 4.51
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) 7.53 / 0.70 5.70 / 0.53
Evaporative Heating Surface (sq ft / m2)363 / 33.70360 / 33.50
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)363 / 33.70360 / 33.50
Evaporative Heating Surface/Cylinder Volume224.38230.26
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1529973
Same as above plus superheater percentage1529973
Same as above but substitute firebox area for grate area
Power L1
Power MT

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