Ceylon Government Railway 2-6-4 Locomotives in Ceylon
Class Details by Steve Llanso of Sweat House Media
Class D3 (Locobase 15942)
Data from "2-6-4 Tank Locomotive, Ceylon Government Railway", The Locomotive Magazine, Volume 16 (14 May 1910), p. 97.See also Eng. Udaya Peeligama, "A Concise History Of Motive Power Development On Sri Lankan Railways", presented on the Institution of Engineers Sri Lanka-New South Wales Chapter website at [
], posted 7 September 2018, last accessed 3 August 2021. 20 were produced by Robert Stephenson & Company and two by Hawthorn, Leslie & Company.
D3 was the designation applied to the saturated version These engines operated on the Coast Line south of Colombo. When they were superheated, their designation was changed to D2. Twelve were rebuilt as D1.
Eng. Peeligama reported that "these fine engines" proved powerful, their 5-foot drivers "lent them the capability of rapd acceleration ...It was a common and impressive sight in the early post-war years to see these formidable machines take in their stride fully loaded 14-coach suburban trains at speed."
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | D3 |
| Locobase ID | 15942 |
| Railroad | Ceylon Government Railway |
| Country | Ceylon |
| Whyte | 2-6-4T |
| Number in Class | 22 |
| Road Numbers | 12v15, 20v21, 131v139, 150-151, 164-168 |
| Gauge | 5'6" |
| Number Built | 22 |
| Builder | several |
| Year | 1907 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 12 / 3.66 |
| Engine Wheelbase (ft / m) | 32.50 / 9.91 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.37 |
| Overall Wheelbase (engine & tender) (ft / m) | 32.50 / 9.91 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 92,960 / 42,166 |
| Engine Weight (lbs / kg) | 160,384 / 72,749 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 160,384 / 72,749 |
| Tender Water Capacity (gals / ML) | 2100 / 7.95 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 3.85 / 4 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 52 / 26 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 60 / 1524 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 19" x 26" / 483x660 |
| Tractive Effort (lbs / kg) | 21,275 / 9650.19 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.37 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | 23.50 / 2.18 |
| Evaporative Heating Surface (sq ft / m2) | 1323 / 122.91 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1323 / 122.91 |
| Evaporative Heating Surface/Cylinder Volume | 155.06 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3760 |
| Same as above plus superheater percentage | 3760 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |