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Great Northern (UK) class H4
The Great Northern class H4 was a 2-6-0 mixed-traffic locomotive designed by Sir Nigel Gresley. Its basis was the H3, but now it got three instead of two cylinders, being the first production locomotive to use Gresley...
| Great Northern (UK) class H4Remove | |
|---|---|
| Variant | Standard |
| Built | 1920-1937 |
| Manufacturers | Doncaster;Darlington;Armstrong Whitworth;Robert Stephenson & Co.;North British |
| Wheel arrangement | 1C |
| Gauge | 1435 mm |
| Length | |
| Service mass | 72852 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Great Northern (UK) class H4 Standard Remove |
|---|---|
| Built | 1920-1937 |
| Manufacturers | Doncaster, Darlington, Armstrong Whitworth, Robert Stephenson & Co., North British |
| Wheel arrangement | 2-6-0 (Mogul) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Great Northern (UK) class H4 Standard Remove |
|---|---|
| Wheelbase | 7.67 m |
| Service mass | 72.9 t |
| Adhesion mass | 61 t |
| Total mass | 116.6 t |
| Rigid wheelbase | 4.95 m |
| Axle load | 20.3 t |
| Water capacity | 15,910 l |
Boiler
| Property | Great Northern (UK) class H4 Standard Remove |
|---|---|
| Grate area | 2.601 m² |
| Firebox surface | 16.908 m² |
| Tube heating surface | 176.609 m² |
| Evaporative heating surface | 193.517 m² |
| Total heating surface | 193.5 m² |
Power plant
| Property | Great Northern (UK) class H4 Standard Remove |
|---|---|
| Driver diameter | 1,727 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | simple expansion |
| Cylinders | three, 470 x 660 mm |
Power
| Property | Great Northern (UK) class H4 Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 746 kW (1,014 PS) |
| Starting effort | 133.6 kN |
Calculated values
| Property | Great Northern (UK) class H4 Standard Remove |
|---|---|
| Factor of adhesion | 1 : 4.48 |
| Optimal speed | 34 km/h |
| Power-to-weight ratio | 10.2 kW/t |
| Heating Surface Equivalent | 278.1 m² |
| Cylinder volume/HSE | 1 : 1,235.65 |
| Adhesive weight/Total | 1 : 1.20 |
| Tractive force/Heating surface | 1 : 14.42 |
| Grate area/Heating surface | 1 : 74.40 |
| Firebox/Tube surface | 1 : 10.45 |
