Data from "New Express and Freight Locomotives, Bombay, Baroda & Central India", Railway Engineer, Volume 45, No 5 (May 1924), 168-179, 178. Works numbers were 5368-5369 in 1924.
Kitson turned out four big engines for the BB&CI, a pair of Pacifics (Locobase ) and this pair of Mikados. RE's report noted that a key goal was the "duplication of as many parts as possible" which the consultng engineers and the builder carried out "effectively" in "the boiler and its fittings, grate bars and ashpan, cab, cylinders valve motion, pistons and rods, crossheads and connecting rods, coupled wheel axlebox and hornblocks, springs and gear, and the trailing radial truck." Or to put it another way, only the driver diameters and the leading truck designs were different. In addition to the large grate, the firebox featured a combustion chamber and 24 sq ft (2.23 sq m) of arch tubes. Steam was admitted to the cylinders through relatively large 11" (279 mm) piston valves. The trailing truck was a radial design with Cartazzi axleboxes linked through compensating beams with the trailing coupled axle's springs." The tenders were also identical save the coal capacity which was lower in the 2-8-2s by 1 1/2 long tons. Or to put it another way, only the driver diameters and the leading truck designs were different. Visually, the two resembled each other, but the Mikado's smaller drivers left a gap between the running board and the boiler.
Principal Dimensions by Steve Llanso of Sweat House Media | |
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Class | unknown |
Locobase ID | 20998 |
Railroad | Bombay, Baroda & Central India |
Country | India |
Whyte | 2-8-2 |
Number in Class | 2 |
Road Numbers | 701-702 |
Gauge | 5'6" |
Number Built | 2 |
Builder | Kitson & Co |
Year | 1924 |
Valve Gear | Walschaert |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 15.75 / 4.80 |
Engine Wheelbase (ft / m) | 33.75 / 10.29 |
Ratio of driving wheelbase to overall engine wheelbase | 0.47 |
Overall Wheelbase (engine & tender) (ft / m) | 63.37 / 19.32 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 40,320 |
Weight on Drivers (lbs / kg) | 160,720 / 72,901 |
Engine Weight (lbs / kg) | 212,016 / 96,169 |
Tender Loaded Weight (lbs / kg) | 164,752 / 74,730 |
Total Engine and Tender Weight (lbs / kg) | 376,768 / 170,899 |
Tender Water Capacity (gals / ML) | 7488 / 28.36 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 13.50 / 14.30 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 67 / 33.50 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 56.50 / 1435 |
Boiler Pressure (psi / kPa) | 160 / 11 |
High Pressure Cylinders (dia x stroke) (in / mm) | 23" x 28" / 584x711 |
Tractive Effort (lbs / kg) | 35,654 / 16172.40 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.51 |
Heating Ability | |
Tubes (number - dia) (in / mm) | |
Flues (number - dia) (in / mm) | |
Flue/Tube length (ft / m) | 18 / 5.49 |
Firebox Area (sq ft / m2) | 239 / 22.20 |
Grate Area (sq ft / m2) | 48 / 4.46 |
Evaporative Heating Surface (sq ft / m2) | 2359 / 219.16 |
Superheating Surface (sq ft / m2) | 550 / 51.10 |
Combined Heating Surface (sq ft / m2) | 2909 / 270.26 |
Evaporative Heating Surface/Cylinder Volume | 175.20 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 7680 |
Same as above plus superheater percentage | 9139 |
Same as above but substitute firebox area for grate area | 45,506 |
Power L1 | 9516 |
Power MT | 522.13 |