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London, Midland & Scottish Ivatt class 4
The Ivatt class 4 was a mixed-traffic locomotive designed for the London, Midland and Scottish Railway by their chief mechanical engineer of the same name. Categorized in power class 4, it was used for medium goods an...
General
| Property | London, Midland & Scottish Ivatt class 4Remove |
|---|---|
| Built | 1947-1952 |
| Manufacturers | Horwich, Doncaster, Darlington |
| Wheel arrangement | 2-6-0 (Mogul) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | London, Midland & Scottish Ivatt class 4Remove |
|---|---|
| Length | 17.04 m |
| Service weight | 60 t |
| Adhesive weight | 51.3 t |
| Axle load | 17 t |
| Total weight | 101 t |
| Water capacity | 15,910 l |
| Fuel capacity | 4.1 t (coal) |
Boiler
| Property | London, Midland & Scottish Ivatt class 4Remove |
|---|---|
| Grate area | 2.137 m² |
| Firebox surface | 12.17 m² |
| Tube heating surface | 101.264 m² |
| Evaporative heating surface | 113.435 m² |
| Superheater surface | 21.461 m² |
| Total heating surface | 134.9 m² |
Power plant
| Property | London, Midland & Scottish Ivatt class 4Remove |
|---|---|
| Driver diameter | 1,600 mm |
| Boiler pressure | 15.5 bar |
| Expansion type | simple expansion |
| Cylinders | two, 444 x 660 mm |
Power
| Property | London, Midland & Scottish Ivatt class 4Remove |
|---|---|
| Power source | steam |
| Estimated power | 843 kW (1,146 PS) |
| Starting effort | 107.5 kN |
Calculated values
| Property | London, Midland & Scottish Ivatt class 4Remove |
|---|---|
| Factor of adhesion | 1 : 4.68 |
| Optimal speed | 48 km/h |
| Power-to-weight ratio | 14.0 kW/t |
| Heating Surface Equivalent | 217.2 m² |
| Cylinder volume/HSE | 1 : 943.62 |
| Adhesive weight/Total | 1 : 1.17 |
| Tractive force/Heating surface | 1 : 16.65 |
| Grate area/Heating surface | 1 : 63.12 |
| Firebox/Tube surface | 1 : 8.32 |
| Total/Superheater | 1 : 5.29 |
