Data from "Four-Wheels-Coupled Bogie Passenger Engines-Eastern Bengal State," The Railway Engineer, Volume 19, No 6 (June 1898), p. 168-178. For details of the passenger carriages designed at the same time, see RE, Volume 19, "Intermediate or Third-Class Carriage: Eastern Bengal State Railway", pp. 209-210, anf "First and Second Class Composite Carrage: Eastern Bengal State Railway", pp. 273-274. ("Six-wheeled First and Second Class Composite Metre Gauge Carriage" Eastern Bengal State Railway" appears on pp. 333-335.
According to the RE report, this design by the EBSR's Locomotive, Carriage and Wagon Superintendent A S Jameson (with Consulting Engineer Sir Alexander Rendel) was meant for fast mail and heavy passenger service work. The result was "for their size, are remarkably light, are easy on the permanent way, and ride very steadily."
The author added an editorial comment by commenting on the extended smokebox, "but not in the exaggerated form of what may be described as the 'pouter pigeon' class." (Locobase is at a loss to explain what that means). He added that extending the smoke-box "is to reduce fuel consumption and, with the country coal in use, to minimize the liability to 'throw fire' and thus do damage, and fill carriages with smuts."
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | unknown |
| Locobase ID | 16067 |
| Railroad | Eastern Bengal State |
| Country | India |
| Whyte | 4-4-0 |
| Number in Class | 3 |
| Road Numbers | 167-169 |
| Gauge | 5'6" |
| Number Built | 3 |
| Builder | Dubs & Co |
| Year | 1898 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 9 / 2.74 |
| Engine Wheelbase (ft / m) | 22.67 / 6.91 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.40 |
| Overall Wheelbase (engine & tender) (ft / m) | 42.02 / 12.81 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 33,152 / 15,038 |
| Weight on Drivers (lbs / kg) | 65,296 / 29,618 |
| Engine Weight (lbs / kg) | 100,240 / 45,468 |
| Tender Loaded Weight (lbs / kg) | 66,528 / 30,177 |
| Total Engine and Tender Weight (lbs / kg) | 166,768 / 75,645 |
| Tender Water Capacity (gals / ML) | 2400 / 9.09 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 5.50 / 5 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 54 / 27 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 74 / 1880 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18" x 26" / 457x660 |
| Tractive Effort (lbs / kg) | 15,482 / 7022.53 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.22 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 222 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 11.42 / 3.48 |
| Firebox Area (sq ft / m2) | 124.49 / 11.57 |
| Grate Area (sq ft / m2) | 22.04 / 2.05 |
| Evaporative Heating Surface (sq ft / m2) | 1282 / 119.10 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1282 / 119.10 |
| Evaporative Heating Surface/Cylinder Volume | 167.41 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3526 |
| Same as above plus superheater percentage | 3526 |
| Same as above but substitute firebox area for grate area | 19,918 |
| Power L1 | 4908 |
| Power MT | 331.42 |