Southern Railway (USA) classes K and Ks
United States 1903 585 produced
The class K designated a class of standard Consolidations of the Southern, with over 500 built beginning in 1903. The first 128 locomotives had a boiler with 437 smoke tubes, the later ones only had 403 tubes. In addition to the Southern, the subsidiaries also received a three-digit number of the second version. From 1921, a total of 393 units were equipped with a superheater, the valve chest was also replaced and the class designation was changed to “Ks”. Depending on whether the individual locomotives had been rebuilt, they were taken out of service towards the end of the 1930s or even survived the early 1950s.
Technical data
General
| Property | first variant | second variant | Ks - 22½ inches |
|---|---|---|---|
| Built | 1903-1904 | 1905-1906 | ab 1921 |
| Manufacturers | ALCO, Baldwin | Baldwin | Southern |
| Wheel arrangement | 2-8-0 (Consolidation) | ||
| Gauge | 1,435 mm (Standard gauge) | ||
Dimensions and weights
| Property | first variant | second variant | Ks - 22½ inches |
|---|---|---|---|
| Wheelbase | 7.40 m | ||
| Total wheelbase | 16.75 m | 17.30 m | |
| Service mass | 90.7 t | 96.6 t | |
| Adhesion mass | 80.2 t | 81.9 t | 85.7 t |
| Total mass | 145.1 t | 157.4 t | 163.3 t |
| Rigid wheelbase | 4.88 m | ||
| Axle load | 20 t | 20.5 t | 21.3 t |
| Water capacity | 30,283 l | 28,391 l | |
| Fuel capacity | 11.3 t (coal) | 10.9 t (coal) | |
Boiler
| Property | first variant | second variant | Ks - 22½ inches |
|---|---|---|---|
| Grate area | 4.924 m² | 5.017 m² | 4.97 m² |
| Firebox surface | 13.285 m² | 22.018 m² | 21.554 m² |
| Tube heating surface | 313.548 m² | 284.748 m² | 194.539 m² |
| Evaporative heating surface | 326.833 m² | 306.766 m² | 216.093 m² |
| Total heating surface | 326.8 m² | 306.8 m² | 263.5 m² |
| Superheater surface | 47.381 m² |
Power plant
| Property | first variant | second variant | Ks - 22½ inches |
|---|---|---|---|
| Driver diameter | 1,422 mm | 1,448 mm | |
| Boiler pressure | 13.8 bar | 14.8 bar | |
| Expansion type | simple expansion | ||
| Cylinders | two, 559 x 762 mm | two, 572 x 762 mm | |
Power
| Property | first variant | second variant | Ks - 22½ inches |
|---|---|---|---|
| Power source | steam | ||
| Estimated power | 1,268 kW (1,724 PS) | 1,305 kW (1,774 PS) | 1,417 kW (1,927 PS) |
| Starting effort | 196.1 kN | 192.6 kN | 216.6 kN |
Calculated values
| Property | first variant | second variant | Ks - 22½ inches |
|---|---|---|---|
| Factor of adhesion | 1 : 4.01 | 1 : 4.17 | 1 : 3.88 |
| Optimal speed | 40 km/h | 42 km/h | 40 km/h |
| Power-to-weight ratio | 14.0 kW/t | 14.4 kW/t | 14.7 kW/t |
| Heating Surface Equivalent | 393.3 m² | 416.9 m² | 418.6 m² |
| Cylinder volume/HSE | 1 : 950.41 | 1 : 896.61 | 1 : 933.86 |
| Adhesive weight/Total | 1 : 1.13 | 1 : 1.11 | 1 : 1.13 |
| Tractive force/Heating surface | 1 : 12.53 | 1 : 13.11 | 1 : 17.17 |
| Grate area/Heating surface | 1 : 66.38 | 1 : 61.15 | 1 : 53.01 |
| Firebox/Tube surface | 1 : 23.60 | 1 : 12.93 | 1 : 9.03 |
| Total/Superheater | 1 : 4.56 |
