Rajputana-Malwa 4-6-0 Locomotives in India

Class Details by Steve Llanso of Sweat House Media

Class A (Locobase 10654)

Data from "Fast Passenger Engines for the Rajputana-Malwa Ry," The Locomotive Magazine, Vol XIV (15 May 1908), p. 86.

Described as "fine engines", the As served the mainline between Phulera Junction and Sujat Road, which had a ruling gradient of 1 in 150 (0.67%). These locomotives had inside plate frames with outside cylinders and motion and Belpaire boiler. They had proved "vey satisfactory both in hauling and steaming capacity." Loaded weight of the engine and tender together came to 54 tons 17 cwt (122,864 lb). A later batch was fitted with larger cylinders (15 1/2" x 22") and a larger tender (2,400 US gal.).

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID10654
Number in Class6
Road Numbers
Number Built6
BuilderAjmer Works
Valve GearStephenson
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)
Engine Weight (lbs / kg)
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)2040 / 7.73
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)53.50 / 1359
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)15" x 20" / 381x508
Tractive Effort (lbs / kg)12,869 / 5837.29
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)
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)
Evaporative Heating Surface (sq ft / m2)842 / 78.25
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)842 / 78.25
Evaporative Heating Surface/Cylinder Volume205.84
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation
Same as above plus superheater percentage
Same as above but substitute firebox area for grate area
Power L1
Power MT

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