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Great Northern (UK) class N1
After the L1, Ivatt developed another tank locomotive for the GNR for use on the city lines of London. In order to be better suited for higher speeds, there were only three driving axles with 5 ft 8 in wheels. As with...
| Great Northern (UK) class N1Remove | |
|---|---|
| Variant | superheated |
| Built | 1906-1912 |
| Manufacturers | Doncaster |
| Wheel arrangement | C1 t |
| Gauge | 1435 mm |
| Length | 11160 mm |
| Service mass | 66907 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Great Northern (UK) class N1superheated |
|---|---|
| Built | 1906-1912 |
| Manufacturers | Doncaster |
| Wheel arrangement | 0-6-2T (Webb) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Great Northern (UK) class N1superheated |
|---|---|
| Length | 11.16 m |
| Wheelbase | 7.24 m |
| Service mass | 66.9 t |
| Adhesion mass | 52.2 t |
| Rigid wheelbase | 4.95 m |
| Axle load | 18.3 t |
| Water capacity | 7,276 l |
| Fuel capacity | 4.1 t (coal) |
Boiler
| Property | Great Northern (UK) class N1superheated |
|---|---|
| Grate area | 1.765 m² |
| Firebox surface | 10.963 m² |
| Tube heating surface | 81.755 m² |
| Evaporative heating surface | 92.717 m² |
| Superheater surface | 19.231 m² |
| Total heating surface | 111.9 m² |
Power plant
| Property | Great Northern (UK) class N1superheated |
|---|---|
| Driver diameter | 1,727 mm |
| Boiler pressure | 11.7 bar |
| Expansion type | simple expansion |
| Cylinders | two, 457 x 660 mm |
Power
| Property | Great Northern (UK) class N1superheated |
|---|---|
| Power source | steam |
| Estimated power | 652 kW (886 PS) |
| Starting effort | 79.6 kN |
Calculated values
| Property | Great Northern (UK) class N1superheated |
|---|---|
| Factor of adhesion | 1 : 6.43 |
| Optimal speed | 50 km/h |
| Power-to-weight ratio | 9.7 kW/t |
| Heating Surface Equivalent | 186.0 m² |
| Cylinder volume/HSE | 1 : 1,165.84 |
| Adhesive weight/Total | 1 : 1.28 |
| Tractive force/Heating surface | 1 : 14.86 |
| Grate area/Heating surface | 1 : 63.43 |
| Firebox/Tube surface | 1 : 7.46 |
| Total/Superheater | 1 : 4.82 |
