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County Donegal class 4
The Railways Joint Committee for County Donegal procured four tank locomotives to cope with the increasing weight of freight trains. With seven axles and a mass of nearly 45 tons, they were a substantial size for the ...
General
| Property | County Donegal class 4Remove |
|---|---|
| Built | 1904 |
| Manufacturers | Nasmyth, Wilson & Co. |
| Wheel arrangement | 4-6-4T (Hudson) |
| Gauge | 914 mm (Three feet) |
Dimensions and weights
| Property | County Donegal class 4Remove |
|---|---|
| Wheelbase | 7.67 m |
| Rigid wheelbase | 2.74 m |
| Service weight | 45.2 t |
| Adhesive weight | 26.4 t |
| Axle load | 8.8 t |
| Water capacity | 6,818 l |
| Fuel capacity | 2.7 t (coal) |
Boiler
| Property | County Donegal class 4Remove |
|---|---|
| Grate area | 1.115 m² |
| Firebox surface | 7.432 m² |
| Tube heating surface | 59.737 m² |
| Evaporative heating surface | 67.169 m² |
| Total heating surface | 67.2 m² |
Power plant
| Property | County Donegal class 4Remove |
|---|---|
| Driver diameter | 1,143 mm |
| Boiler pressure | 11 bar |
| Expansion type | simple expansion |
| Cylinders | two, 381 x 533 mm |
Power
| Property | County Donegal class 4Remove |
|---|---|
| Power source | steam |
| Estimated power | 261 kW (355 PS) |
| Starting effort | 63.5 kN |
Calculated values
| Property | County Donegal class 4Remove |
|---|---|
| Factor of adhesion | 1 : 4.08 |
| Optimal speed | 26 km/h |
| Power-to-weight ratio | 5.8 kW/t |
| Heating Surface Equivalent | 104.3 m² |
| Cylinder volume/HSE | 1 : 1,165.78 |
| Adhesive weight/Total | 1 : 1.71 |
| Tractive force/Heating surface | 1 : 19.75 |
| Grate area/Heating surface | 1 : 60.24 |
| Firebox/Tube surface | 1 : 8.04 |
