Data from "Metre Gauge Locomotive for Assam", The Locomotive Magazine, Volume XV (15 March 1909), p. 53 . See also [], a ca. 1920 Vulcan Foundry catalogue and Leslie S Robertson, Secretary, Report of the Locomotive Committee on Standard Locomotives for Indian Railways (London: Crosby Lockwood & Son, 2nd Ed, November 1905); and Cyril Hitchcock, "The Standardisation of Locomotives in India, 1910", Engineer, Volume 110 (28 October 1910), pp. 475 .
The Heavy Goods engine of the British Engineering Standards Association series designed for Indian narrow-gauge railways. This low-drivered Twelve-wheeler was the top of the line in the BESA freight locomotives. Hitchcock's 1910 report stated that the design's wheelbase was originally intended to be longer than required for the diameter of the drivers to stay within the government's loading requirements. As those rules had been revised (chiefly because of upgrades to rail and permanent way), the wheelbase would be shortened.
See HP 4-6-0 for fuller discussion of the BESA program and two views of its suitability.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | BESA/G |
| Locobase ID | 4262 |
| Railroad | |
| Country | India |
| Whyte | 4-8-0 |
| Number in Class | |
| Road Numbers | |
| Gauge | Metre |
| Number Built | |
| Builder | |
| Year | 1906 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 12 / 3.66 |
| Engine Wheelbase (ft / m) | 21.25 / 6.48 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.56 |
| Overall Wheelbase (engine & tender) (ft / m) | 46.03 / 14.03 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 17,920 / 8128 |
| Weight on Drivers (lbs / kg) | 71,680 / 32,514 |
| Engine Weight (lbs / kg) | 88,480 / 40,134 |
| Tender Loaded Weight (lbs / kg) | 51,408 / 23,318 |
| Total Engine and Tender Weight (lbs / kg) | 139,888 / 63,452 |
| Tender Water Capacity (gals / ML) | 2400 / 9.09 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 4.40 / 4 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 30 / 15 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 43 / 1092 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 22" / 406x559 |
| Tractive Effort (lbs / kg) | 20,039 / 9089.55 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.58 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 235 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10.83 / 3.30 |
| Firebox Area (sq ft / m2) | 126.20 / 11.72 |
| Grate Area (sq ft / m2) | 17.50 / 1.63 |
| Evaporative Heating Surface (sq ft / m2) | 1291 / 119.94 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1291 / 119.94 |
| Evaporative Heating Surface/Cylinder Volume | 252.17 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3150 |
| Same as above plus superheater percentage | 3150 |
| Same as above but substitute firebox area for grate area | 22,716 |
| Power L1 | 4843 |
| Power MT | 595.81 |