North Western State - Kalabash-Bannu line 2-8-2 Locomotives in India

Class Details by Steve Llanso of Sweat House Media

Class 13 (Locobase 20346)

Data from "2-8-2 Goods Locomotives for the North Western State Ry of India, Trans-Indus Section, Kalabash-Bannu Line", Locomotive Magazine, Volume XX [ 20] (15 April 1914), pp. 108-110; and "Narrow Gauge Goods Locomotive, Indian State Rys", Locomotive Magazine, Volume XXIII [23] (17 February 1917), p. 23. Works numbers were 20952-20955 in 1915.

Tackling the Kalabash-Bannu line beginning at the broad-gauge station at Mari on the east bank of the Indus inevitably meant heavy duty. The consulting engineering firm Rendel, Palmer & Tritton worked with North British and came up with a wood-burning Mikado.

Its relatively broad wood-burning grate and Belpaire firebox indicated a trailing axle whose 36" diameter wheels were inside a widened section of the engine frame that was attached to a steel transverse casting ahead of the firebox.. The leading truck rode under a long deck ahead of the smokebox. Both axles had boxes fixed to long members leading to a central pivot.

The wood fuel implies a relatively large grate and the tender held 2 1/2 tons (2,540 kg) of it.

Principal Dimensions by Steve Llanso of Middle Run Media

Locobase ID20346
RailroadNorth Western State - Kalabash-Bannu line
Number in Class4
Road Numbers13-16
Number Built4
BuilderNorth British
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m) 9.58 / 2.92
Engine Wheelbase (ft / m)22.83 / 6.96
Ratio of driving wheelbase to overall engine wheelbase 0.42
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)62,720 / 28,449
Engine Weight (lbs / kg)87,584 / 39,727
Tender Loaded Weight (lbs / kg)41,216 / 18,695
Total Engine and Tender Weight (lbs / kg)128,800 / 58,422
Tender Water Capacity (gals / ML)2040 / 7.73
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 2.75 / 3
Minimum weight of rail (calculated) (lb/yd / kg/m)26 / 13
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)34 / 864
Boiler Pressure (psi / kPa)170 / 11.70
High Pressure Cylinders (dia x stroke) (in / mm)14.5" x 18" / 368x457
Tractive Effort (lbs / kg)16,084 / 7295.59
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.90
Heating Ability
Tubes (number - dia) (in / mm)170 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)12.75 / 3.89
Firebox Area (sq ft / m2)79 / 7.34
Grate Area (sq ft / m2)20.50 / 1.90
Evaporative Heating Surface (sq ft / m2)1218 / 113.16
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1218 / 113.16
Evaporative Heating Surface/Cylinder Volume354.05
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3485
Same as above plus superheater percentage3485
Same as above but substitute firebox area for grate area13,430
Power L14517
Power MT635.09

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Wes Barris