Data from "Madras Railway Type 4.6.0", Locomotives Constructed by Kitson & Co (Leeds: n.d.). Works numbers were 4448-4459 in 1906 and 4515-4526 in 1907.
As noted in Locobase 6371, which describes the HPs delivered by V ulcan to the Bombay, Baroda & Central India in 1905, this double dozen of high-drivered Ten-wheelers belonged to the series of British Engineering Standards Association designs that hoped to standardized steam locomotive procurment. See Locobase 4251 for an account of the BESA program. (In the US, the Harriman Lines' Harriman Common Standard series pursued a similar goal.)
Like those of the BB&CI, the MR's 4-6-0's Belpaire boiler presented heating surface area of a good size to provide steam to the cylinder volume.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | BESA/HP - Kitson |
| Locobase ID | 21003 |
| Railroad | Madras |
| Country | India |
| Whyte | 4-6-0 |
| Number in Class | 24 |
| Road Numbers | |
| Gauge | 5'6" |
| Number Built | 24 |
| Builder | Kitson & Co |
| Year | 1906 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 14.25 / 4.34 |
| Engine Wheelbase (ft / m) | 27.25 / 8.31 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.52 |
| Overall Wheelbase (engine & tender) (ft / m) | 51.61 / 15.73 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 36,960 |
| Weight on Drivers (lbs / kg) | 110,544 / 50,142 |
| Engine Weight (lbs / kg) | 148,176 / 67,212 |
| Tender Loaded Weight (lbs / kg) | 101,696 / 46,129 |
| Total Engine and Tender Weight (lbs / kg) | 249,872 / 113,341 |
| Tender Water Capacity (gals / ML) | 4800 / 18.18 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 8.25 / 7.50 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 61 / 30.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 74 / 1880 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 20" x 26" / 508x660 |
| Tractive Effort (lbs / kg) | 21,503 / 9753.61 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.14 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 201 - 2.25" / 0 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 15.84 |
| Firebox Area (sq ft / m2) | 158 / 14.68 |
| Grate Area (sq ft / m2) | 32 / 2.97 |
| Evaporative Heating Surface (sq ft / m2) | 2037 / 189.24 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 2037 / 189.24 |
| Evaporative Heating Surface/Cylinder Volume | 215.47 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 5760 |
| Same as above plus superheater percentage | 5760 |
| Same as above but substitute firebox area for grate area | 28,440 |
| Power L1 | 6638 |
| Power MT | 397.15 |