Data from "Tank Locomotive, Bombay Port Trust", Locomotive Magazine, Volume XX [20], (15 October 1914), p. 261.See also the Nasmyth Wilson production list at [],%20Gaskell%20and%20Company&nojs=1, last accessed 24 October 2017. Works numbers were 965-1000 in 1913, 1032-1033 in 1914, 1106-1111 in 1915, and 1359-1368 in 1921.
These stocky Mogul tanks were designed by the Bombay Port Trust's consulting engineering firm John Wolfe Barry, Lyster & Partners of Westminster. The Trust would buy 30 locomotives of the same design from 1913-1922.
They were the principal type of locomotives used by this active port authority and remained in service into the 21st Century.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | A |
| Locobase ID | 20312 |
| Railroad | Bombay Port Trust |
| Country | India |
| Whyte | 2-6-0T |
| Number in Class | 6 |
| Road Numbers | 1-6 |
| Gauge | 5'6" |
| Number Built | 6 |
| Builder | Neilson & Co |
| Year | 1913 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 11.50 / 3.51 |
| Engine Wheelbase (ft / m) | 20 / 6.10 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.57 |
| Overall Wheelbase (engine & tender) (ft / m) | 20 / 6.10 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 90,000 / 40,823 |
| Engine Weight (lbs / kg) | 90,000 / 40,823 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 2400 / 9.09 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 50 / 25 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 56.50 / 1435 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18" x 26" / 457x660 |
| Tractive Effort (lbs / kg) | 22,812 / 10347.36 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.95 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 218 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10.33 / 3.05 |
| Firebox Area (sq ft / m2) | 98.30 / 9.13 |
| Grate Area (sq ft / m2) | 19.18 / 1.78 |
| Evaporative Heating Surface (sq ft / m2) | 1131 / 105.07 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1131 / 105.07 |
| Evaporative Heating Surface/Cylinder Volume | 147.70 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3452 |
| Same as above plus superheater percentage | 3452 |
| Same as above but substitute firebox area for grate area | 17,694 |
| Power L1 | 3591 |
| Power MT | 263.89 |