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South African class 15F
The class 15F was the most numerous steam locomotive class of the SAR. Introduced in 1938 under Chief Mechanical Engineer W.A.J. Day, it represented the final development of the class 15 family of 4-8-2 locomotives th...
| South African class 15FRemove | |
|---|---|
| Variant | first batches |
| Built | 1938, 1944-1945 |
| Manufacturers | BMAG;Henschel;North British;Beyer, Peacock & Co. |
| Wheel arrangement | 2D1 |
| Gauge | 1067 mm |
| Length | 22401 mm |
| Service mass | 110343 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | South African class 15Ffirst batches |
|---|---|
| Built | 1938, 1944-1945 |
| Manufacturers | BMAG, Henschel, North British, Beyer, Peacock & Co. |
| Wheel arrangement | 4-8-2 (Mountain) |
| Gauge | 1,067 mm |
Dimensions and weights
| Property | South African class 15Ffirst batches |
|---|---|
| Length | 22.40 m |
| Wheelbase | 10.87 m |
| Total wheelbase | 19.97 m |
| Service mass | 110.3 t |
| Adhesion mass | 72.9 t |
| Total mass | 180.9 t |
| Rigid wheelbase | 4.80 m |
| Axle load | 18.4 t |
| Water capacity | 27,278 l |
| Fuel capacity | 14.2 t (coal) |
Boiler
| Property | South African class 15Ffirst batches |
|---|---|
| Grate area | 5.853 m² |
| Firebox surface | 21.554 m² |
| Tube heating surface | 294.317 m² |
| Evaporative heating surface | 315.871 m² |
| Superheater surface | 62.803 m² |
| Total heating surface | 378.7 m² |
Power plant
| Property | South African class 15Ffirst batches |
|---|---|
| Driver diameter | 1,524 mm |
| Boiler pressure | 14.5 bar |
| Expansion type | simple expansion |
| Cylinders | two, 610 x 711 mm |
Power
| Property | South African class 15Ffirst batches |
|---|---|
| Power source | steam |
| Estimated power | 1,864 kW (2,534 PS) |
| Starting effort | 213.4 kN |
Calculated values
| Property | South African class 15Ffirst batches |
|---|---|
| Factor of adhesion | 1 : 3.35 |
| Optimal speed | 53 km/h |
| Power-to-weight ratio | 16.9 kW/t |
| Heating Surface Equivalent | 549.2 m² |
| Cylinder volume/HSE | 1 : 755.85 |
| Adhesive weight/Total | 1 : 1.51 |
| Tractive force/Heating surface | 1 : 11.77 |
| Grate area/Heating surface | 1 : 64.70 |
| Firebox/Tube surface | 1 : 13.65 |
| Total/Superheater | 1 : 5.03 |
