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London, Midland & Scottish Fowler 4P 2-6-4T
The LMS Fowler class 4P was the first in a series of 2-6-4T tank locomotives designed for long-distance commuter services. It was introduced in 1927 by Henry Fowler and formed the basis for derivatives by Stanier, Fai...
| London, Midland & Scottish Fowler 4P 2-6-4TRemove | |
|---|---|
| Variant | Standard |
| Built | 1927-1934 |
| Manufacturers | Derby |
| Wheel arrangement | 1C2 t |
| Gauge | 1435 mm |
| Length | 14395 mm |
| Service mass | 87634 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | London, Midland & Scottish Fowler 4P 2-6-4T Standard Remove |
|---|---|
| Built | 1927-1934 |
| Manufacturers | Derby |
| Wheel arrangement | 2-6-4T (Adriatic) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | London, Midland & Scottish Fowler 4P 2-6-4T Standard Remove |
|---|---|
| Length | 14.40 m |
| Wheelbase | 11.74 m |
| Service mass | 87.6 t |
| Adhesion mass | 54.5 t |
| Rigid wheelbase | 5.03 m |
| Axle load | 18.3 t |
| Water capacity | 9,093 l |
| Fuel capacity | 3.6 t (coal) |
Boiler
| Property | London, Midland & Scottish Fowler 4P 2-6-4T Standard Remove |
|---|---|
| Grate area | 2.323 m² |
| Firebox surface | 12.821 m² |
| Tube heating surface | 100.521 m² |
| Evaporative heating surface | 113.342 m² |
| Superheater surface | 24.712 m² |
| Total heating surface | 138.1 m² |
Power plant
| Property | London, Midland & Scottish Fowler 4P 2-6-4T Standard Remove |
|---|---|
| Driver diameter | 1,753 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 483 x 660 mm |
Power
| Property | London, Midland & Scottish Fowler 4P 2-6-4T Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 913 kW (1,241 PS) |
| Starting effort | 102.9 kN |
Calculated values
| Property | London, Midland & Scottish Fowler 4P 2-6-4T Standard Remove |
|---|---|
| Factor of adhesion | 1 : 5.20 |
| Optimal speed | 55 km/h |
| Power-to-weight ratio | 10.4 kW/t |
| Heating Surface Equivalent | 226.9 m² |
| Cylinder volume/HSE | 1 : 1,064.93 |
| Adhesive weight/Total | 1 : 1.61 |
| Tractive force/Heating surface | 1 : 15.56 |
| Grate area/Heating surface | 1 : 59.43 |
| Firebox/Tube surface | 1 : 7.84 |
| Total/Superheater | 1 : 4.59 |
