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South African class MC
To expand their Mallet fleet inherited from the NGR, the SAR ordered ten locomotives of the new class MC in 1912. As opposed to the NGR Mallets which were now designated classes MA and MB and had been built by ALCO, t...
General
| Property | South African class MCRemove |
|---|---|
| Built | 1912 |
| Manufacturers | North British |
| Wheel arrangement | 2-6-6-0 |
| Gauge | 1,067 mm (Cape gauge) |
Dimensions and weights
| Property | South African class MCRemove |
|---|---|
| Length | 20.36 m |
| Wheelbase | 10.19 m |
| Rigid wheelbase | 2.54 m |
| Total wheelbase | 18.06 m |
| Service weight | 96.8 t |
| Adhesive weight | 87.9 t |
| Axle load | 14.9 t |
| Total weight | 141 t |
| Water capacity | 18,185 l |
| Fuel capacity | 8.4 t (coal) |
Boiler
| Property | South African class MCRemove |
|---|---|
| Grate area | 3.948 m² |
| Firebox surface | 14.307 m² |
| Tube heating surface | 228.728 m² |
| Evaporative heating surface | 243.035 m² |
| Total heating surface | 243.0 m² |
Power plant
| Property | South African class MCRemove |
|---|---|
| Driver diameter | 1,156 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | compound |
| Cylinders | four, HP: 444 x 660 mm and LP: 711 x 660 mm |
Power
| Property | South African class MCRemove |
|---|---|
| Power source | steam |
| Estimated power | 895 kW (1,217 PS) |
| Starting effort | 190.3 kN |
| Starting effort simple | 228.4 kN |
Calculated values
| Property | South African class MCRemove |
|---|---|
| Factor of adhesion | 1 : 4.53 |
| Optimal speed | 29 km/h |
| Power-to-weight ratio | 9.2 kW/t |
| Heating Surface Equivalent | 314.6 m² |
| Cylinder volume/HSE | 1 : 1,485.55 |
| Adhesive weight/Total | 1 : 1.10 |
| Tractive force/Heating surface | 1 : 16.36 |
| Grate area/Heating surface | 1 : 61.56 |
| Firebox/Tube surface | 1 : 15.99 |
