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 Middle Run Media | |
|---|---|
| Class | PA/AP |
| Locobase ID | 2682 |
| Railroad | East Indian |
| Country | India |
| Whyte | 4-4-2 |
| Number in Class | 28 |
| Road Numbers | 123-150/1300-1327 |
| Gauge | 5'6" |
| Number Built | 28 |
| Builder | Vulcan Foundry |
| Year | 1908 |
| Valve Gear | Stephenson |
| 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 / 1240 |
| 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 Volume | 189.28 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 5310 |
| Same as above plus superheater percentage | 5310 |
| Same as above but substitute firebox area for grate area | 25,560 |
| Power L1 | 6009 |
| Power MT | 381.55 |