East Indian 4-4-2 Locomotives in India

Class Details by Steve Llanso of Sweat House Media

Class PA/AP (Locobase 2682)

Data from [], a page of the ca. 1920 Vulcan Foundry catalogue. See also "New Locomotive Equipment; East Indian Railway", Railroad Gazette, Volume XLVI [46], No 8 (19 February 1909), pp. 368-369. (Many thanks to Abhijit Gore for his 30 December 2020 email supplying the class ID and road numbers as well as a comment on the engine's weight.) According the list reproduced on [], these Atlantics were works numbers were 2330-2357.

Roger Hennessey nsc.chelt@talk21.com confirms that the East Indian used the BESA AP boiler with Belpaire firebox. On the other hand, Abjihit Gore pointed out the 7 ton (15,680 lb/7,112 kg) difference in weight between these engines and a standard BESA. They used Richardson balanced slide valves to admit steam to the cylinders. RG commented that the "very commodious" cab lacked a matching tender cab and thus presented an appearance "more nearly in accordance with English standards than is the case with the majority of locomotives sent out to India."

de Glehn Atlantics for the Bengal Nagpur had boilers pressed to 220 psi. Locobase was surprised to find a set of Ten-wheelers that followed these 4-4-2s immediately in VF's production that shared every significant specification; see Locobase 2576.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID2682
RailroadEast Indian
Number in Class28
Road Numbers123-150/1300-1327
Number Built28
BuilderVulcan Foundry
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) / 4.57
Engine Wheelbase (ft / m)27.50 / 8.38
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)50 / 15.24
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)69,440 / 31,497
Engine Weight (lbs / kg)136,080 / 61,725
Tender Loaded Weight (lbs / kg)84,000 / 38,102
Total Engine and Tender Weight (lbs / kg)220,080 / 99,827
Tender Water Capacity (gals / ML)3780 / 14.32
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 5.60 / 5.10
Minimum weight of rail (calculated) (lb/yd / kg/m)58 / 29
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)73.50 / 1867
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)19" x 26" / 483x660
Tractive Effort (lbs / kg)19,538 / 8862.30
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.55
Heating Ability
Tubes (number - dia) (in / mm)201 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)14 / 4.27
Firebox Area (sq ft / m2)142 / 13.19
Grate Area (sq ft / m2)29.50 / 2.74
Evaporative Heating Surface (sq ft / m2)1615 / 150.04
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1615 / 150.04
Evaporative Heating Surface/Cylinder Volume189.28
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5310
Same as above plus superheater percentage5310
Same as above but substitute firebox area for grate area25,560
Power L16009
Power MT381.55

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