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South African class MH
The class MH of the South African Railways consisted of five 2-6-6-2 Mallets built in 1915 for coal traffic on the line between Witbank and Germiston in Transvaal. There they complemented the class MJ 2-6-6-0 Mallets ...
| South African class MHRemove | |
|---|---|
| Variant | Standard |
| Built | 1915 |
| Manufacturers | North British |
| Wheel arrangement | (1C)C1 ma |
| Gauge | 1067 mm |
| Length | 24206 mm |
| Service mass | 130308 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | South African class MH Standard Remove |
|---|---|
| Built | 1915 |
| Manufacturers | North British |
| Wheel arrangement | 2-6-6-2 (Mallet Mogul) |
| Gauge | 1,067 mm |
Dimensions and weights
| Property | South African class MH Standard Remove |
|---|---|
| Length | 24.21 m |
| Wheelbase | 13.28 m |
| Total wheelbase | 21.60 m |
| Service mass | 130.3 t |
| Adhesion mass | 107.3 t |
| Total mass | 182.4 t |
| Rigid wheelbase | 2.64 m |
| Axle load | 18.5 t |
| Water capacity | 19,321 l |
| Fuel capacity | 10.2 t (coal) |
Boiler
| Property | South African class MH Standard Remove |
|---|---|
| Grate area | 4.924 m² |
| Firebox surface | 23.226 m² |
| Tube heating surface | 275.086 m² |
| Evaporative heating surface | 298.312 m² |
| Superheater surface | 58.901 m² |
| Total heating surface | 357.2 m² |
Power plant
| Property | South African class MH Standard Remove |
|---|---|
| Driver diameter | 1,219 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | compound |
| Cylinders | four, HP: 508 x 660 mm and LP: 800 x 660 mm |
Power
| Property | South African class MH Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 1,454 kW (1,977 PS) |
| Starting effort | 210.2 kN |
| Starting effort simple | 252.2 kN |
Calculated values
| Property | South African class MH Standard Remove |
|---|---|
| Factor of adhesion | 1 : 5.01 |
| Optimal speed | 42 km/h |
| Power-to-weight ratio | 11.2 kW/t |
| Heating Surface Equivalent | 532.2 m² |
| Cylinder volume/HSE | 1 : 1,126.81 |
| Adhesive weight/Total | 1 : 1.21 |
| Tractive force/Heating surface | 1 : 12.29 |
| Grate area/Heating surface | 1 : 72.55 |
| Firebox/Tube surface | 1 : 11.84 |
| Total/Superheater | 1 : 5.06 |
