Data from "Locomotives for Indian Metre Gauge Railways", Locomotive Magazine, Volume XXVII [27] (15 March 1921), pp. 56-57. See also "Locomotives in 1921", Engineer, Volume 133, No 1 (6 January 1922), pp. 10-12, 14. (Many thanks to Abhijit Gore for his 31 January 2021 reply to Locobase's plea for more information on the numbers of engines delivered. His response with citation to original source appears immediately below:
Old Company Class Nos. Makers Works Nos Description
EBSR Js 22-26 4107, 4109-4112 Lot of 13 locomotives sent to East Bengal State Railways. 3 remained and rest transferred to BURMA railways
EBSR Js 27-31 4114-4117, 4113 Lot of 13 locomotives sent to East Bengal State Railways. 3 remained and rest transferred to BURMA railways
EBSR PS 56-58 4105-4106, 4108
JBR SP 138-147 4120-4129
JBR PS 148-152 4130-4134
MSMR PS/6 393-397 4232-4236
NSR MS 171-172 4118-4119 Sent to Iraq in 1942
RKKR P/S 78-79 4135-4136
Consulting engineer,s Rendel, Palmer and Tritton prepared the specifications for an order that covered batches for the Eastern Bengal (EBSR), the Nizam's State Railway (NSR), Jodhpur-Bikanir (JBR), and Rohilkund (RKKR). All were equipped with superheaters and a Belpaire firebox that carried its grate above the drrivers
Tender weight is that of the Jodhpur-Bikanir eight-wheel tender shown in LM's diagram on page 56. LM noted the "waterless tract of the Bikanir Desert" required more onboard fuel and water supplies. Eastern Bengal's tenders also had eight wheels while the other two had six.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | BESA |
| Locobase ID | 20831 |
| Railroad | several |
| Country | India |
| Whyte | 4-6-0 |
| Number in Class | |
| Road Numbers | |
| Gauge | Metre |
| Number Built | |
| Builder | Kerr, Stuart & Co |
| Year | 1920 |
| 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) | 43 / 13.11 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 21,056 / 9551 |
| Weight on Drivers (lbs / kg) | 62,608 / 28,399 |
| Engine Weight (lbs / kg) | 82,208 / 37,289 |
| Tender Loaded Weight (lbs / kg) | 65,408 / 29,669 |
| Total Engine and Tender Weight (lbs / kg) | 147,616 / 66,958 |
| Tender Water Capacity (gals / ML) | 3000 / 11.36 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 6.60 / 6 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 35 / 17.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 57 / 1448 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16.5" x 22" / 419x559 |
| Tractive Effort (lbs / kg) | 14,291 / 6482.30 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.38 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 90 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | 12 - 5.25" / 133 |
| Flue/Tube length (ft / m) | 11.75 / 3.58 |
| Firebox Area (sq ft / m2) | 107 / 9.94 |
| Grate Area (sq ft / m2) | 15.40 / 1.43 |
| Evaporative Heating Surface (sq ft / m2) | 786 / 73.02 |
| Superheating Surface (sq ft / m2) | 151 / 14.03 |
| Combined Heating Surface (sq ft / m2) | 937 / 87.05 |
| Evaporative Heating Surface/Cylinder Volume | 144.36 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2464 |
| Same as above plus superheater percentage | 2858 |
| Same as above but substitute firebox area for grate area | 19,859 |
| Power L1 | 7482 |
| Power MT | 790.39 |