Compare locomotives
Add a locomotive
South African class FD
After the single 2-6-2+2-6-2 Modified Fairlie of class FC of the South African Railways, Colonel F.R. Collins specified a somewhat heavier variant that was again to be built by North British. The four locomotives were...
| South African class FDRemove | |
|---|---|
| Variant | Standard |
| Built | 1925 |
| Manufacturers | North British |
| Wheel arrangement | (1C1)(1C1) t mf |
| Gauge | 1067 mm |
| Length | 20009 mm |
| Service mass | 115900 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | South African class FD Standard Remove |
|---|---|
| Built | 1925 |
| Manufacturers | North British |
| Wheel arrangement | 2-6-2+2-6-2T (Modified Fairlie) |
| Gauge | 1,067 mm |
Dimensions and weights
| Property | South African class FD Standard Remove |
|---|---|
| Length | 20.01 m |
| Wheelbase | 17.86 m |
| Service mass | 115.9 t |
| Adhesion mass | 74 t |
| Rigid wheelbase | 2.59 m |
| Axle load | 12.6 t |
| Water capacity | 17,277 l |
| Fuel capacity | 5.1 t (coal) |
Boiler
| Property | South African class FD Standard Remove |
|---|---|
| Grate area | 3.8 m² |
| Firebox surface | 16.5 m² |
| Tube heating surface | 144.186 m² |
| Evaporative heating surface | 160.685 m² |
| Superheater surface | 34.467 m² |
| Total heating surface | 195.2 m² |
Power plant
| Property | South African class FD Standard Remove |
|---|---|
| Driver diameter | 1,168 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | simple expansion |
| Cylinders | four, 381 x 610 mm |
Power
| Property | South African class FD Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 969 kW (1,317 PS) |
| Starting effort | 159.8 kN |
Calculated values
| Property | South African class FD Standard Remove |
|---|---|
| Factor of adhesion | 1 : 4.54 |
| Optimal speed | 37 km/h |
| Power-to-weight ratio | 8.4 kW/t |
| Heating Surface Equivalent | 312.1 m² |
| Cylinder volume/HSE | 1 : 890.68 |
| Adhesive weight/Total | 1 : 1.57 |
| Tractive force/Heating surface | 1 : 17.10 |
| Grate area/Heating surface | 1 : 51.36 |
| Firebox/Tube surface | 1 : 8.74 |
| Total/Superheater | 1 : 4.66 |
