Gwalior Light Railway 4-6-2 Locomotives in India

Class Details by Steve Llanso of Sweat House Media

Class unknown (Locobase 20337)

Data from Data from "Two-Foot Gauge Locomotive for India," Engineer, Volume 153, No 6 (5 February 1932), pp. 164-165.

Engineer's report said that four of the eight passenger engines in this order were headed for the Ujain Agar Railways section of the Gwalior. Leading bogie and trailing truck wheels were fitted with Cortazzi axle boxes and all had prominent outside bearings. A double plate frame held the coupled drivers. Just behind the steam dome and ahead of the prominent Belpaire firebox, a "Filtrator" containing linseeds. Entering steam absorbed the starch from the linseed and, after reentering the boiler, deposited the starch on scale particles to avoid a hard build up.

Engineer also commented that while the Gwalior had other locomotives of a similar type, "these are the more completely modern in its possession."

Much later, two of the engines (works 2457 and 2460, road numbers 38 and 41) were bought from the Gwalior and returned to England. In 2018, they were listed as part of the Vale of Rheidol Railway's museum collection.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID20337
RailroadGwalior Light Railway
Number in Class8
Road Numbers
Number Built8
BuilderWG Bagnall
Valve GearWalschaert
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)46.42 / 14.15
Axle Loading (Maximum Weight per Axle) (lbs / kg)13,440 / 6096
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)1800 / 6.82
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 4.40 / 4
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)33 / 838
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)11" x 18" / 279x457
Tractive Effort (lbs / kg)10,098 / 4580.38
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)11.25 / 3.43
Firebox Area (sq ft / m2)62 / 5.76
Grate Area (sq ft / m2)12.30 / 1.14
Evaporative Heating Surface (sq ft / m2)592 / 55
Superheating Surface (sq ft / m2)130 / 12.08
Combined Heating Surface (sq ft / m2)722 / 67.08
Evaporative Heating Surface/Cylinder Volume299.01
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2214
Same as above plus superheater percentage2613
Same as above but substitute firebox area for grate area13,169
Power L110,361
Power MT

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