Barsi Light Railway 4-6-4 Locomotives in India

Class Details by Steve Llanso of Sweat House Media

Class G (Locobase 20992)

Data from "Barsi Light Railway 4-8-4T" in , Locomotives Manufactured by Messrs Kitson & Co Ltd, Leeds. Works numbers were 1539-1543 in 1928.

In 1926, the BRL began taking delivery its first tender road engines (works numbers 1482-1486) . Over the next three years, Nasmyth Wilson would sandwich ten F-class 2-8-2s around Nasmyth Wilson's quintet of Hudson locomotives that were designed by Westminster's consulting engineering firm of Sir John Wolfe Barry and Partners

Compared to the earlier A (0-8-4T) and B (4-8-4T) engines, all seven were much more like miniature standard-gaugers. Maximum allowable axle loading and wheelbase constraints still limited weight and size, but rail weights and permanent way upgrades allowed an increase to 7 long tons per axle. The aspect ratio of driver diameter to rail gauge was 1.40, equivalent to a 79" driver on the standard gauge. Each square foot of grate area served 28% fewer square feet of evaporative heating surface area.

(Hunslet would supply three more Mikados in 1949.)

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID20992
RailroadBarsi Light Railway
Number in Class5
Road Numbers31-35
Number Built5
BuilderNasmyth Wilson
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)8 / 2.44
Engine Wheelbase (ft / m)25.92 / 7.90
Ratio of driving wheelbase to overall engine wheelbase 0.31
Overall Wheelbase (engine & tender) (ft / m)44.67 / 13.62
Axle Loading (Maximum Weight per Axle) (lbs / kg)15,680 / 7112
Weight on Drivers (lbs / kg)46,525 / 21,103
Engine Weight (lbs / kg)86,106 / 39,057
Tender Loaded Weight (lbs / kg)50,960 / 23,115
Total Engine and Tender Weight (lbs / kg)137,066 / 62,172
Tender Water Capacity (gals / ML)1105 / 4.19
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 2.20 / 2
Minimum weight of rail (calculated) (lb/yd / kg/m)26 / 13
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)42 / 1067
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)15" x 18" / 381x457
Tractive Effort (lbs / kg)13,114 / 5948.42
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.55
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)75 / 6.97
Grate Area (sq ft / m2)20.50 / 1.90
Evaporative Heating Surface (sq ft / m2)888 / 82.50
Superheating Surface (sq ft / m2)177 / 16.44
Combined Heating Surface (sq ft / m2)1065 / 98.94
Evaporative Heating Surface/Cylinder Volume241.20
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3280
Same as above plus superheater percentage3838
Same as above but substitute firebox area for grate area14,040
Power L18689
Power MT1235.20

All material Copyright ©
Wes Barris