Danske Statsbaner 2-6-4 Locomotives in Denmark
Class Details by Steve Llanso of Sweat House Media
Class S (II) (Locobase 4029)
Data from WilliamBay, Danmarks Damplokomotiver (1977). Borsig built the first two in 1924 (works numbers were 11716-11717) and Frichs produced the other 18 in 1927-1928 (works numbers 69-86). See also [
] for line drawing with dimensions.
The class ran mostly in northern Zeeland and Krstbane serving Copenhagen-area commuter and suburban service. Tonnage rating was 350 tons on the level at 85 km/h (53 mph).
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | S (II) |
| Locobase ID | 4029 |
| Railroad | Danske Statsbaner (DSB) |
| Country | Denmark |
| Whyte | 2-6-4T |
| Number in Class | 20 |
| Road Numbers | S 721-S 740 |
| Gauge | Std |
| Number Built | 20 |
| Builder | Frichs |
| Year | 1924 |
| Valve Gear | Heusinger |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 13.29 / 4.05 |
| Engine Wheelbase (ft / m) | 37.57 / 11.45 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.35 |
| Overall Wheelbase (engine & tender) (ft / m) | 37.57 / 11.45 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 112,224 / 50,904 |
| Engine Weight (lbs / kg) | 217,281 / 98,557 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 2640 / 10 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 3.40 / 3 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 62 / 31 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 68.10 / 1730 |
| Boiler Pressure (psi / kPa) | 174 / 1200 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16.93" x 26.38" / 430x670 |
| Tractive Effort (lbs / kg) | 16,421 / 7448.45 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 6.83 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 15.75 / 4.80 |
| Firebox Area (sq ft / m2) | 138.80 / 12.90 |
| Grate Area (sq ft / m2) | 25.82 / 2.40 |
| Evaporative Heating Surface (sq ft / m2) | 1272 / 118.22 |
| Superheating Surface (sq ft / m2) | 495 / 46 |
| Combined Heating Surface (sq ft / m2) | 1767 / 164.22 |
| Evaporative Heating Surface/Cylinder Volume | 185.06 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4493 |
| Same as above plus superheater percentage | 5751 |
| Same as above but substitute firebox area for grate area | 30,914 |
| Power L1 | 18,449 |
| Power MT | 1087.28 |