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South African class S1
The class S1 was the most powerful steam shunter built for the South African Railways. It was designed by Dr. M.M. Loubser in World War II with the goal to produce an enforcement to the class S in the SAR's own Salt R...
General
| Property | South African class S1Remove |
|---|---|
| Built | 1947, 1953 |
| Manufacturers | SAR, North British |
| Wheel arrangement | 0-8-0 (Eight-coupled) |
| Gauge | 1,067 mm (Cape gauge) |
Dimensions and weights
| Property | South African class S1Remove |
|---|---|
| Length | 19.51 m |
| Wheelbase | 4.50 m |
| Rigid wheelbase | 4.50 m |
| Total wheelbase | 14.94 m |
| Service weight | 75.6 t |
| Adhesive weight | 75.6 t |
| Axle load | 20.2 t |
| Total weight | 142.3 t |
| Water capacity | 27,278 l |
| Fuel capacity | 11.2 t (coal) |
Boiler
| Property | South African class S1Remove |
|---|---|
| Grate area | 3.902 m² |
| Firebox surface | 15.608 m² |
| Tube heating surface | 148.645 m² |
| Evaporative heating surface | 164.253 m² |
| Superheater surface | 39.763 m² |
| Total heating surface | 204.0 m² |
Power plant
| Property | South African class S1Remove |
|---|---|
| Driver diameter | 1,219 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | simple expansion |
| Cylinders | two, 591 x 686 mm |
Power
| Property | South African class S1Remove |
|---|---|
| Power source | steam |
| Estimated power | 969 kW (1,317 PS) |
| Starting effort | 206.9 kN |
Calculated values
| Property | South African class S1Remove |
|---|---|
| Factor of adhesion | 1 : 3.58 |
| Optimal speed | 29 km/h |
| Power-to-weight ratio | 12.8 kW/t |
| Heating Surface Equivalent | 321.8 m² |
| Cylinder volume/HSE | 1 : 1,167.40 |
| Adhesive weight/Total | 1 : 1.00 |
| Tractive force/Heating surface | 1 : 21.18 |
| Grate area/Heating surface | 1 : 52.28 |
| Firebox/Tube surface | 1 : 9.52 |
| Total/Superheater | 1 : 4.13 |
