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South African class 15A
The class 15A was a 4-8-2 mixed traffic locomotive designed by D.A. Hendrie as a successor of the class 15. It was the last plate frame locomotive of this wheel arrangement designed by him and had the goal to address ...
| South African class 15ARemove | |
|---|---|
| Variant | as built |
| Built | 1914-1925 |
| Manufacturers | North British;Beyer, Peacock & Co.;Maffei |
| Wheel arrangement | 2D1 |
| Gauge | 1067 mm |
| Length | 21009 mm |
| Service mass | 96321 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | South African class 15Aas built |
|---|---|
| Built | 1914-1925 |
| Manufacturers | North British, Beyer, Peacock & Co., Maffei |
| Wheel arrangement | 4-8-2 (Mountain) |
| Gauge | 1,067 mm |
Dimensions and weights
| Property | South African class 15Aas built |
|---|---|
| Length | 21.01 m |
| Wheelbase | 10.26 m |
| Total wheelbase | 18.46 m |
| Service mass | 96.3 t |
| Adhesion mass | 67.1 t |
| Total mass | 148.2 t |
| Rigid wheelbase | 4.57 m |
| Axle load | 16.3 t |
| Water capacity | 19,321 l |
| Fuel capacity | 10.2 t (coal) |
Boiler
| Property | South African class 15Aas built |
|---|---|
| Grate area | 3.716 m² |
| Firebox surface | 17.837 m² |
| Tube heating surface | 170.384 m² |
| Evaporative heating surface | 188.222 m² |
| Superheater surface | 44.408 m² |
| Total heating surface | 232.6 m² |
Power plant
| Property | South African class 15Aas built |
|---|---|
| Driver diameter | 1,448 mm |
| Boiler pressure | 12.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 559 x 711 mm |
Power
| Property | South African class 15Aas built |
|---|---|
| Power source | steam |
| Estimated power | 1,007 kW (1,369 PS) |
| Starting effort | 166.3 kN |
Calculated values
| Property | South African class 15Aas built |
|---|---|
| Factor of adhesion | 1 : 3.96 |
| Optimal speed | 37 km/h |
| Power-to-weight ratio | 10.5 kW/t |
| Heating Surface Equivalent | 366.2 m² |
| Cylinder volume/HSE | 1 : 952.53 |
| Adhesive weight/Total | 1 : 1.44 |
| Tractive force/Heating surface | 1 : 14.93 |
| Grate area/Heating surface | 1 : 62.60 |
| Firebox/Tube surface | 1 : 9.55 |
| Total/Superheater | 1 : 4.24 |
