Indian Railways 2-6-0 Locomotives in India

Class Details by Steve Llanso of Sweat House Media

Class IRS/YK (Locobase 4269)

Part of a series of designs created in the mid-1920s to meet Indian railway requirements. This was a little narrow-gauge Mogul that apparently used the same running gear as the 0-6-2 YF, but used a front truck instead of the trailer.

[] notes that these had "...a wider firebox and other improvements to handle low-grade coal."

Dr. Jonathan Smith of Iowa State ([] ) for data on this design.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID4269
RailroadIndian Railways
Number in Class
Road Numbers
Number Built
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)51,520 / 23,369
Engine Weight (lbs / kg)69,440 / 31,497
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)29 / 14.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)43 / 1092
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)14" x 22" / 356x559
Tractive Effort (lbs / kg)13,638 / 6186.10
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.78
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)14 / 1.30
Evaporative Heating Surface (sq ft / m2)449 / 41.73
Superheating Surface (sq ft / m2)120 / 11.15
Combined Heating Surface (sq ft / m2)569 / 52.88
Evaporative Heating Surface/Cylinder Volume114.55
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2240
Same as above plus superheater percentage2710
Same as above but substitute firebox area for grate area
Power L1
Power MT

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Wes Barris