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Great Northern (UK) class K
To haul heavy coal trains from Peterborough to London, Ivatt developed the class K, which was soon dubbed the “Long Tom” because of its longer boiler compared to the six-coupled locomotives. The dimensions of this boi...
| Great Northern (UK) class KRemove | |
|---|---|
| Variant | rebuilt Q2 |
| Built | 1908-1920 |
| Manufacturers | Doncaster |
| Wheel arrangement | D |
| Gauge | 1435 mm |
| Length | |
| Service mass | 59185 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Great Northern (UK) class Krebuilt Q2 |
|---|---|
| Built | 1908-1920 |
| Manufacturers | Doncaster |
| Wheel arrangement | 0-8-0 (Eight-coupled) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Great Northern (UK) class Krebuilt Q2 |
|---|---|
| Wheelbase | 12.60 m |
| Service mass | 59.2 t |
| Adhesion mass | 59.2 t |
| Total mass | 103 t |
| Rigid wheelbase | 5.39 m |
| Axle load | 15.7 t |
Boiler
| Property | Great Northern (UK) class Krebuilt Q2 |
|---|---|
| Grate area | 2.276 m² |
| Firebox surface | 12.588 m² |
| Tube heating surface | 91.184 m² |
| Evaporative heating surface | 103.773 m² |
| Superheater surface | 23.597 m² |
| Total heating surface | 127.4 m² |
Power plant
| Property | Great Northern (UK) class Krebuilt Q2 |
|---|---|
| Driver diameter | 1,422 mm |
| Boiler pressure | 11.7 bar |
| Expansion type | simple expansion |
| Cylinders | two, 533 x 660 mm |
Power
| Property | Great Northern (UK) class Krebuilt Q2 |
|---|---|
| Power source | steam |
| Estimated power | 671 kW (912 PS) |
| Starting effort | 131.6 kN |
Calculated values
| Property | Great Northern (UK) class Krebuilt Q2 |
|---|---|
| Factor of adhesion | 1 : 4.41 |
| Optimal speed | 31 km/h |
| Power-to-weight ratio | 11.3 kW/t |
| Heating Surface Equivalent | 213.9 m² |
| Cylinder volume/HSE | 1 : 1,379.78 |
| Adhesive weight/Total | 1 : 1.00 |
| Tractive force/Heating surface | 1 : 21.58 |
| Grate area/Heating surface | 1 : 55.96 |
| Firebox/Tube surface | 1 : 7.24 |
| Total/Superheater | 1 : 4.40 |
