Indian State 4-4-0 Locomotives in India

Class Details by Steve Llanso of Sweat House Media

Class Class O (Locobase 3042)

Data from E L Ahrons, The British Railway Locomotive, 1825-1925 (London: Locomotive Publishing Company, 1926).

Very similar to the 1880 Rajputana-Malwa design (including the Belpaire boiler), these engines differed from those engines in having outside cylinders. Dubs, Neilson, and Vulcan Foundry supplied "a very large number" of these engines to several railways in the Indian State system including the Bengal & Northwestern.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassClass O
Locobase ID3042
RailroadIndian State
Number in Class
Road Numbers
Number Built
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)6 / 1.83
Engine Wheelbase (ft / m)15.17 / 4.62
Ratio of driving wheelbase to overall engine wheelbase 0.40
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)36,736 / 16,663
Engine Weight (lbs / kg)53,760 / 24,385
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)31 / 15.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)53 / 1346
Boiler Pressure (psi / kPa)140 / 9.70
High Pressure Cylinders (dia x stroke) (in / mm)14" x 20" / 356x508
Tractive Effort (lbs / kg)8802 / 3992.52
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.17
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)52.40 / 4.87
Grate Area (sq ft / m2)10.58 / 0.98
Evaporative Heating Surface (sq ft / m2)549 / 51.02
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)549 / 51.02
Evaporative Heating Surface/Cylinder Volume154.07
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1481
Same as above plus superheater percentage1481
Same as above but substitute firebox area for grate area7336
Power L12815
Power MT337.87

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Wes Barris