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Great Northern (UK) class O1 “Tangos”
The O1 was designed by Sir Nigel Gresley for the Great Northern Railway to reduce the number of heavy coal trains between Grantham and London with more powerful locomotives. So far, the classes Q1 and Q2 with the 0-8-...
| Great Northern (UK) class O1 “Tangos”Remove | |
|---|---|
| Variant | Standard |
| Built | 1914-1919 |
| Manufacturers | Doncaster;North British |
| Wheel arrangement | 1D |
| Gauge | 1435 mm |
| Length | 18580 mm |
| Service mass | 77423 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Great Northern (UK) class O1 “Tangos” Standard Remove |
|---|---|
| Built | 1914-1919 |
| Manufacturers | Doncaster, North British |
| Wheel arrangement | 2-8-0 (Consolidation) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Great Northern (UK) class O1 “Tangos” Standard Remove |
|---|---|
| Length | 18.58 m |
| Wheelbase | 8.03 m |
| Total wheelbase | 15.70 m |
| Service mass | 77.4 t |
| Adhesion mass | 68.5 t |
| Total mass | 121.2 t |
| Rigid wheelbase | 5.64 m |
| Axle load | 17.9 t |
| Water capacity | 19,094 l |
| Fuel capacity | 7.3 t (coal) |
Boiler
| Property | Great Northern (UK) class O1 “Tangos” Standard Remove |
|---|---|
| Grate area | 2.508 m² |
| Firebox surface | 15.05 m² |
| Tube heating surface | 178.56 m² |
| Evaporative heating surface | 193.61 m² |
| Superheater surface | 52.955 m² |
| Total heating surface | 246.6 m² |
Power plant
| Property | Great Northern (UK) class O1 “Tangos” Standard Remove |
|---|---|
| Driver diameter | 1,422 mm |
| Boiler pressure | 11.7 bar |
| Expansion type | simple expansion |
| Cylinders | two, 533 x 711 mm |
Power
| Property | Great Northern (UK) class O1 “Tangos” Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 858 kW (1,167 PS) |
| Starting effort | 141.7 kN |
Calculated values
| Property | Great Northern (UK) class O1 “Tangos” Standard Remove |
|---|---|
| Factor of adhesion | 1 : 4.74 |
| Optimal speed | 37 km/h |
| Power-to-weight ratio | 11.1 kW/t |
| Heating Surface Equivalent | 374.8 m² |
| Cylinder volume/HSE | 1 : 848.11 |
| Adhesive weight/Total | 1 : 1.13 |
| Tractive force/Heating surface | 1 : 12.01 |
| Grate area/Heating surface | 1 : 98.31 |
| Firebox/Tube surface | 1 : 11.86 |
| Total/Superheater | 1 : 3.66 |
