Most data from [], a ca. 1920 Vulcan Foundry catalogue. See also Leslie S Robertson, Secretary, Report of the Locomotive Committee on Standard Locomotives for Indian Railways (London: Crosby Lockwood & Son, 2nd Ed, November 1905) and "British Engines for the Orient", Railway Times, Volume 89 (23 January 1906), pp. 42-43. See also "Thirty-Years' Development, Meter-Gage [sic] Locomotives, Indian State Railways", Railroad Age Gazette, Volume XLVII [47], No. 3 (16 July 1909), p. 110.
British Engineering Standards Association narrow-gauge version of the BESA Ten-Wheeler (Locobase 4242), a sort of half-scale HP.. The Belpaire-boilered design came in two wheel diameters; see Locobase 14422 for the pure freight version.
The Railway Times report referred specifically to the Nasmyth Wilson engines headed for the Eastern Bengal. This railway's core was a broad-gauge spine running up from Calcutta to the Ganges River, then eastward to the meeting of the Ganges and the Brahmaputra. The "guaranteed" contract ran out and the Indian state took it over, adding the Northern Bengal's narrow gauge system north of the Ganges. By 1906, the Eastern Bengal included 384 miles (618 km) of broad gauge, 938 (1,510 km) of metre gauge, and 55 miles (89 km) of 2 ft 6 in gauge.
Principal Dimensions by Steve Llanso of Middle Run Media | |
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Class | BESA/P |
Locobase ID | 20544 |
Railroad | Eastern Bengal State |
Country | India |
Whyte | 4-6-0 |
Number in Class | |
Road Numbers | |
Gauge | Metre |
Number Built | |
Builder | Nasmyth Wilson |
Year | 1905 |
Valve Gear | Walschaert |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 12 / 3.66 |
Engine Wheelbase (ft / m) | 21.12 / 6.44 |
Ratio of driving wheelbase to overall engine wheelbase | 0.57 |
Overall Wheelbase (engine & tender) (ft / m) | 42.19 / 12.86 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
Weight on Drivers (lbs / kg) | 58,240 / 26,417 |
Engine Weight (lbs / kg) | 74,704 / 33,885 |
Tender Loaded Weight (lbs / kg) | 49,280 / 22,353 |
Total Engine and Tender Weight (lbs / kg) | 123,984 / 56,238 |
Tender Water Capacity (gals / ML) | 2400 / 9.09 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 4.50 / 4 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 32 / 16 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 57 / 1448 |
Boiler Pressure (psi / kPa) | 180 / 1240 |
High Pressure Cylinders (dia x stroke) (in / mm) | 15.5" x 22" / 394x559 |
Tractive Effort (lbs / kg) | 14,187 / 6435.12 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.11 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 177 - 1.75" / 44 |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | 11.77 / 3.59 |
Firebox Area (sq ft / m2) | 108 / 10.03 |
Grate Area (sq ft / m2) | 16 / 1.49 |
Evaporative Heating Surface (sq ft / m2) | 1062 / 98.66 |
Superheating Surface (sq ft / m2) | |
Combined Heating Surface (sq ft / m2) | 1062 / 98.66 |
Evaporative Heating Surface/Cylinder Volume | 221.04 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 2880 |
Same as above plus superheater percentage | 2880 |
Same as above but substitute firebox area for grate area | 19,440 |
Power L1 | 5702 |
Power MT | 647.53 |