Dublin & South Eastern 4-4-2 Locomotives in Ireland
Class Details by Steve Llanso of Sweat House Media
Class 455/C2 (Locobase 20974)
Data from "Passenger Tank Engines, Great Southern Ry of Ireland, Dublin and South-Eastern Section", Locomotive Magazine, Volume XXXI [30], No. 390 (14 February 1925), pp. 31-32; and "DSER 20" in Wikipedia at [
], last accessed 8 January 2022. Batch 02427 works numbers were 6204-6205 in 1924..
The DSE needed fast passenger locomotives
Wikipedia says the DSE took note of the London, Brighton & South Coast I3's class. So they built the 20 in their own shops using a Kitson & Company boiler. The 20 "seemed to have issues with high axle loading restricting the route and it also appeared to have difficulties with heavier trains, steep gradients, and hot axleboxes."
One choice--a speed-related installation of 73" drivers-- "may not have helped especially as it ended up being used on suburban services." Not only did suburban engines usually use smaller drivers, a typical day's run came to a mere 90 miles (145 km) a day.
In the event, the GSR rebuilt the trio and, says Wikipedia, "a 1948 CIE report commented:'DSER heavy passenger engines. (When) (sic.) well maintained not all that bad. Essential to local service.'"
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 455/C2 |
| Locobase ID | 20974 |
| Railroad | Dublin & South Eastern (DSE) |
| Country | Ireland |
| Whyte | 4-4-2T |
| Number in Class | 3 |
| Road Numbers | 20, 34-35/455-457 |
| Gauge | 5'3" |
| Number Built | 3 |
| Builder | Beyer, Peacock |
| Year | 1922 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | 28.25 / 8.61 |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | 28.25 / 8.61 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 35,280 |
| Weight on Drivers (lbs / kg) | 70,560 / 32,006 |
| Engine Weight (lbs / kg) | 141,120 / 64,011 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 141,120 / 64,011 |
| Tender Water Capacity (gals / ML) | 3122 / 11.83 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 6.70 / 6.10 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 59 / 29.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 73 / 1854 |
| Boiler Pressure (psi / kPa) | 175 / 1210 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18" x 26" / 457x660 |
| Tractive Effort (lbs / kg) | 17,165 / 7785.92 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.11 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 128 / 11.89 |
| Grate Area (sq ft / m2) | 20 / 1.86 |
| Evaporative Heating Surface (sq ft / m2) | 1194 / 110.93 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1194 / 110.93 |
| Evaporative Heating Surface/Cylinder Volume | 155.92 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3500 |
| Same as above plus superheater percentage | 3500 |
| Same as above but substitute firebox area for grate area | 22,400 |
| Power L1 | 5099 |
| Power MT | 318.63 |