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South African class 15E
The class 15E was designed by A.G. Watson as a further development of the class 15C Mountain for mixed service. At that time, in 1935, Watson introduced several standardization features for the classes 15E, 16E and 19...
General
| Property | South African class 15ERemove |
|---|---|
| Built | 1935-1936 |
| Manufacturers | Robert Stephenson & Hawthorns, Henschel, BMAG |
| Wheel arrangement | 4-8-2 (Mountain) |
| Gauge | 1,067 mm (Cape gauge) |
Dimensions and weights
| Property | South African class 15ERemove |
|---|---|
| Length | 22.40 m |
| Wheelbase | 10.87 m |
| Rigid wheelbase | 4.80 m |
| Total wheelbase | 19.97 m |
| Service weight | 110.7 t |
| Adhesive weight | 74.7 t |
| Axle load | 19 t |
| Total weight | 181.3 t |
| Water capacity | 118,711 l |
| Fuel capacity | 3.3 t (coal) |
Boiler
| Property | South African class 15ERemove |
|---|---|
| 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 15ERemove |
|---|---|
| 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 15ERemove |
|---|---|
| Power source | steam |
| Estimated power | 1,864 kW (2,534 PS) |
| Starting effort | 213.4 kN |
Calculated values
| Property | South African class 15ERemove |
|---|---|
| Factor of adhesion | 1 : 3.43 |
| Optimal speed | 53 km/h |
| Power-to-weight ratio | 16.8 kW/t |
| Heating Surface Equivalent | 549.2 m² |
| Cylinder volume/HSE | 1 : 755.85 |
| Adhesive weight/Total | 1 : 1.48 |
| 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 |
