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South African class 5 “Enlarged Karoo”
Based on the 4-6-2 Karoo class locomotives, the Cape Government Railways ordered four “Enlarged Karoo” locomotives also designed by H.M. Beatty shortly before the founding of the South African Railways. In comparison ...
| South African class 5 “Enlarged Karoo”Remove | |
|---|---|
| Variant | class 5 |
| Built | 1912 |
| Manufacturers | Vulcan Foundry |
| Wheel arrangement | 2C1 |
| Gauge | 1067 mm |
| Length | 19520 mm |
| Service mass | 69345 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | South African class 5 “Enlarged Karoo”class 5 |
|---|---|
| Built | 1912 |
| Manufacturers | Vulcan Foundry |
| Wheel arrangement | 4-6-2 (Pacific) |
| Gauge | 1,067 mm |
Dimensions and weights
| Property | South African class 5 “Enlarged Karoo”class 5 |
|---|---|
| Length | 19.52 m |
| Wheelbase | 8.97 m |
| Total wheelbase | 17.02 m |
| Service mass | 69.3 t |
| Adhesion mass | 47 t |
| Total mass | 119.5 t |
| Rigid wheelbase | 3.25 m |
| Axle load | 16 t |
| Water capacity | 18,185 l |
| Fuel capacity | 10.2 t (coal) |
Boiler
| Property | South African class 5 “Enlarged Karoo”class 5 |
|---|---|
| Grate area | 3.177 m² |
| Firebox surface | 13.192 m² |
| Tube heating surface | 178.746 m² |
| Evaporative heating surface | 191.938 m² |
| Total heating surface | 191.9 m² |
Power plant
| Property | South African class 5 “Enlarged Karoo”class 5 |
|---|---|
| Driver diameter | 1,549 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 483 x 711 mm |
Power
| Property | South African class 5 “Enlarged Karoo”class 5 |
|---|---|
| Power source | steam |
| Estimated power | 727 kW (988 PS) |
| Starting effort | 125.3 kN |
Calculated values
| Property | South African class 5 “Enlarged Karoo”class 5 |
|---|---|
| Factor of adhesion | 1 : 3.68 |
| Optimal speed | 35 km/h |
| Power-to-weight ratio | 10.5 kW/t |
| Heating Surface Equivalent | 257.9 m² |
| Cylinder volume/HSE | 1 : 1,008.88 |
| Adhesive weight/Total | 1 : 1.48 |
| Tractive force/Heating surface | 1 : 13.64 |
| Grate area/Heating surface | 1 : 60.41 |
| Firebox/Tube surface | 1 : 13.55 |
