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Great Western Railway class 4900 “Hall”
The Hall class consisted of a total of 258 4-6-0 mixed traffic locomotives introduced by Charles Collett in 1928. It was designed since the 2-6-0 of the class 4300 had quickly become too weak for the increasing train ...
| Great Western Railway class 4900 “Hall”Remove | |
|---|---|
| Variant | Standard |
| Built | 1924, 1928-1943 |
| Manufacturers | Swindon |
| Wheel arrangement | 2C |
| Gauge | 1435 mm |
| Length | 19209 mm |
| Service mass | 76204 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Great Western Railway class 4900 “Hall” Standard Remove |
|---|---|
| Built | 1924, 1928-1943 |
| Manufacturers | Swindon |
| Wheel arrangement | 4-6-0 (Ten-wheeler) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Great Western Railway class 4900 “Hall” Standard Remove |
|---|---|
| Length | 19.21 m |
| Wheelbase | 8.26 m |
| Total wheelbase | 16.27 m |
| Service mass | 76.2 t |
| Adhesion mass | 57.4 t |
| Total mass | 122.1 t |
| Rigid wheelbase | 4.50 m |
| Axle load | 19.3 t |
| Water capacity | 18,185 l |
| Fuel capacity | 6.1 t (coal) |
Boiler
| Property | Great Western Railway class 4900 “Hall” Standard Remove |
|---|---|
| Grate area | 2.515 m² |
| Firebox surface | 14.38 m² |
| Tube heating surface | 156.655 m² |
| Evaporative heating surface | 171.035 m² |
| Superheater surface | 24.434 m² |
| Total heating surface | 195.5 m² |
Power plant
| Property | Great Western Railway class 4900 “Hall” Standard Remove |
|---|---|
| Driver diameter | 1,829 mm |
| Boiler pressure | 15.5 bar |
| Expansion type | simple expansion |
| Cylinders | two, 470 x 762 mm |
Power
| Property | Great Western Railway class 4900 “Hall” Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 1,342 kW (1,825 PS) |
| Starting effort | 121.3 kN |
Calculated values
| Property | Great Western Railway class 4900 “Hall” Standard Remove |
|---|---|
| Factor of adhesion | 1 : 4.64 |
| Optimal speed | 68 km/h |
| Power-to-weight ratio | 17.6 kW/t |
| Heating Surface Equivalent | 291.8 m² |
| Cylinder volume/HSE | 1 : 905.72 |
| Adhesive weight/Total | 1 : 1.33 |
| Tractive force/Heating surface | 1 : 12.96 |
| Grate area/Heating surface | 1 : 77.72 |
| Firebox/Tube surface | 1 : 10.89 |
| Total/Superheater | 1 : 7.00 |
