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South Australian class 620
The class 620 was a Pacific designed for passenger service on light rails with only 60 pounds per yard or 30 kg per metre. Ten were built in the Islington Railway Workshops starting in 1936 after the broad gauge line ...
General
| Property | South Australian class 620Remove |
|---|---|
| Built | 1936-1938 |
| Manufacturers | Islington |
| Wheel arrangement | 4-6-2 (Pacific) |
| Gauge | 1,600 mm (Irish broad gauge) |
Dimensions and weights
| Property | South Australian class 620Remove |
|---|---|
| Length | 21.23 m |
| Wheelbase | 10.03 m |
| Rigid wheelbase | 3.71 m |
| Total wheelbase | 21.23 m |
| Service weight | 82.8 t |
| Adhesive weight | 48 t |
| Axle load | 16.2 t |
| Total weight | 143 t |
| Water capacity | 23,640 l |
| Fuel capacity | 9.1 t (coal) |
Boiler
| Property | South Australian class 620Remove |
|---|---|
| Grate area | 3.103 m² |
| Firebox surface | 16.258 m² |
| Tube heating surface | 144.929 m² |
| Evaporative heating surface | 161.187 m² |
| Superheater surface | 39.112 m² |
| Total heating surface | 200.3 m² |
Power plant
| Property | South Australian class 620Remove |
|---|---|
| Driver diameter | 1,676 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 470 x 711 mm |
Power
| Property | South Australian class 620Remove |
|---|---|
| Power source | steam |
| Estimated power | 1,156 kW (1,572 PS) |
| Starting effort | 109.8 kN |
Calculated values
| Property | South Australian class 620Remove |
|---|---|
| Factor of adhesion | 1 : 4.29 |
| Optimal speed | 64 km/h |
| Power-to-weight ratio | 14.0 kW/t |
| Heating Surface Equivalent | 320.7 m² |
| Cylinder volume/HSE | 1 : 769.17 |
| Adhesive weight/Total | 1 : 1.72 |
| Tractive force/Heating surface | 1 : 11.45 |
| Grate area/Heating surface | 1 : 64.55 |
| Firebox/Tube surface | 1 : 8.91 |
| Total/Superheater | 1 : 4.12 |
