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South African class GEA
The class GEA was a 4-8-2+2-8-4 “Double Mountain” Garratt designed by M.M. Loubser for freight traffic on light branch lines directly after World War II. It was a successor of the class GE 2-8-2+2-8-2 “Double Mikado” ...
| South African class GEARemove | |
|---|---|
| Variant | as built |
| Built | 1945-1947 |
| Manufacturers | Peyer, Peacock & Co. |
| Wheel arrangement | (2D1)(1D2) t ga |
| Gauge | 1067 mm |
| Length | 26949 mm |
| Service mass | 190001 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | South African class GEAas built |
|---|---|
| Built | 1945-1947 |
| Manufacturers | Peyer, Peacock & Co. |
| Wheel arrangement | 4-8-2+2-8-4T (Double Mountain (Garratt)) |
| Gauge | 1,067 mm |
Dimensions and weights
| Property | South African class GEAas built |
|---|---|
| Length | 26.95 m |
| Wheelbase | 24.64 m |
| Service mass | 190 t |
| Adhesion mass | 117.9 t |
| Rigid wheelbase | 4.08 m |
| Axle load | 15.2 t |
| Water capacity | 25,457 l |
| Fuel capacity | 10.2 t (coal) |
Boiler
| Property | South African class GEAas built |
|---|---|
| Grate area | 4.766 m² |
| Firebox surface | 19.695 m² |
| Tube heating surface | 216.278 m² |
| Evaporative heating surface | 235.974 m² |
| Superheater surface | 43.664 m² |
| Total heating surface | 279.6 m² |
Power plant
| Property | South African class GEAas built |
|---|---|
| Driver diameter | 1,219 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | four, 470 x 660 mm |
Power
| Property | South African class GEAas built |
|---|---|
| Power source | steam |
| Estimated power | 1,342 kW (1,825 PS) |
| Starting effort | 280.4 kN |
Calculated values
| Property | South African class GEAas built |
|---|---|
| Factor of adhesion | 1 : 4.12 |
| Optimal speed | 29 km/h |
| Power-to-weight ratio | 7.1 kW/t |
| Heating Surface Equivalent | 421.8 m² |
| Cylinder volume/HSE | 1 : 1,086.14 |
| Adhesive weight/Total | 1 : 1.61 |
| Tractive force/Heating surface | 1 : 20.94 |
| Grate area/Heating surface | 1 : 58.67 |
| Firebox/Tube surface | 1 : 10.98 |
| Total/Superheater | 1 : 5.40 |
