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Rhodesia Railways classes 15 and 15A
The Rhodesian Railways had been using the 16th class since 1929, which was a Garratt with 2-8-2+2-8-2 wheel arrangement and showed good running characteristics. However, there was a desire for a locomotive with larger...
| Rhodesia Railways classes 15 and 15ARemove | |
|---|---|
| Variant | 15A Franco-Belge |
| Built | 1952 |
| Manufacturers | Franco-Belge |
| Wheel arrangement | (2C2)(2C2) t ga |
| Gauge | 1067 mm |
| Length | |
| Service mass | 189737 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Rhodesia Railways classes 15 and 15A15A Franco-Belge |
|---|---|
| Built | 1952 |
| Manufacturers | Franco-Belge |
| Wheel arrangement | 4-6-4+4-6-4T (Double Hudson (Garratt)) |
| Gauge | 1,067 mm |
Dimensions and weights
| Property | Rhodesia Railways classes 15 and 15A15A Franco-Belge |
|---|---|
| Total wheelbase | 25.68 m |
| Service mass | 189.7 t |
| Adhesion mass | 91.4 t |
| Rigid wheelbase | 3.20 m |
| Axle load | 16.2 t |
| Water capacity | 31,824 l |
| Fuel capacity | 10.2 t (coal) |
Boiler
| Property | Rhodesia Railways classes 15 and 15A15A Franco-Belge |
|---|---|
| Grate area | 4.608 m² |
| Firebox surface | 23.597 m² |
| Tube heating surface | 197.977 m² |
| Evaporative heating surface | 221.574 m² |
| Superheater surface | 45.894 m² |
| Total heating surface | 267.5 m² |
Power plant
| Property | Rhodesia Railways classes 15 and 15A15A Franco-Belge |
|---|---|
| Driver diameter | 1,448 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | four, 444 x 660 mm |
Power
| Property | Rhodesia Railways classes 15 and 15A15A Franco-Belge |
|---|---|
| Power source | steam |
| Estimated power | 1,417 kW (1,927 PS) |
| Starting effort | 211.3 kN |
Calculated values
| Property | Rhodesia Railways classes 15 and 15A15A Franco-Belge |
|---|---|
| Factor of adhesion | 1 : 4.25 |
| Optimal speed | 42 km/h |
| Power-to-weight ratio | 7.5 kW/t |
| Heating Surface Equivalent | 431.3 m² |
| Cylinder volume/HSE | 1 : 950.33 |
| Adhesive weight/Total | 1 : 2.07 |
| Tractive force/Heating surface | 1 : 16.50 |
| Grate area/Heating surface | 1 : 58.04 |
| Firebox/Tube surface | 1 : 8.39 |
| Total/Superheater | 1 : 4.83 |
