Mysore Distillation & Iron Works 2-6-4 Locomotives in India

Class Details by Steve Llanso of Sweat House Media

Class 3 (Locobase 14659)

Data from DeGolyer, Vol 60, pp. 376. Works numbers were 52719-52721 in December 1919, 52810-52811 in January 1920.

The layout of this small tank seems to have placed maneuverability in tight places over most other qualities. The curves within this big plant were as bowed as 30 degrees (radii of 193 ft/59 metres) and gradients could be as steep as 2%. Compared to other six-coupled engines on such a narrow gauge, this design was in the upper half in power and weight.

The rectangular side tanks held 420 US gallons (1,590 litres) each and the rear tank another 360 US gallons (1,363 litres).

The plant, which took three years to build and opened on 18 January 1923, featured twelve carbonization retorts that processed 240 tons of wood per day into two tar products: a soluble tar used as a disinfectant and a settled tar used in wood preservation.. Other facilities included a distillation plant to recover and manufacture by-products and a 60-ton capacity charcoal blast furnace that turned out charcoal pig iron.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID14659
RailroadMysore Distillation & Iron Works
Number in Class5
Road Numbers3-7
Number Built5
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)6 / 1.83
Engine Wheelbase (ft / m)20.75 / 6.32
Ratio of driving wheelbase to overall engine wheelbase 0.29
Overall Wheelbase (engine & tender) (ft / m)20.75 / 6.32
Axle Loading (Maximum Weight per Axle) (lbs / kg)11,200
Weight on Drivers (lbs / kg)33,000 / 14,969
Engine Weight (lbs / kg)58,000 / 26,308
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)58,000 / 26,308
Tender Water Capacity (gals / ML)1200 / 4.55
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 2.20 / 2
Minimum weight of rail (calculated) (lb/yd / kg/m)18 / 9
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)30 / 762
Boiler Pressure (psi / kPa)170 / 11.70
High Pressure Cylinders (dia x stroke) (in / mm)10" x 16" / 254x406
Tractive Effort (lbs / kg)7707 / 3495.84
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.28
Heating Ability
Tubes (number - dia) (in / mm)85 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 9.25 / 2.82
Firebox Area (sq ft / m2)34 / 3.16
Grate Area (sq ft / m2) 9.30 / 0.86
Evaporative Heating Surface (sq ft / m2)391 / 36.32
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)391 / 36.32
Evaporative Heating Surface/Cylinder Volume268.83
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1581
Same as above plus superheater percentage1581
Same as above but substitute firebox area for grate area5780
Power L13279
Power MT657.18

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