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Southern Railway (UK) Merchant Navy class
During the Second World War, the Southern Railway realized that it urgently needed new and more powerful express locomotives. These were primarily intended to be used in front of the increasingly heavier boat trains b...
General
| Property | Southern Railway (UK) Merchant Navy class Remove |
|---|---|
| Built | 1941-1949 |
| Manufacturers | Eastleigh |
| Wheel arrangement | 4-6-2 (Pacific) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Southern Railway (UK) Merchant Navy class Remove |
|---|---|
| Wheelbase | 11.20 m |
| Rigid wheelbase | 4.57 m |
| Total wheelbase | 18.75 m |
| Empty weight | 86 t |
| Service weight | 96.3 t |
| Adhesive weight | 57.2 t |
| Axle load | 21.3 t |
| Water capacity | 22,731 l |
| Fuel capacity | 5.1 t (coal) |
Boiler
| Property | Southern Railway (UK) Merchant Navy class Remove |
|---|---|
| Grate area | 4.506 m² |
| Firebox surface | 25.548 m² |
| Tube heating surface | 202.157 m² |
| Evaporative heating surface | 227.706 m² |
| Superheater surface | 81.941 m² |
| Total heating surface | 309.6 m² |
Power plant
| Property | Southern Railway (UK) Merchant Navy class Remove |
|---|---|
| Driver diameter | 1,880 mm |
| Boiler pressure | 19.3 bar |
| Expansion type | simple expansion |
| Cylinders | three, 457 x 610 mm |
Power
| Property | Southern Railway (UK) Merchant Navy class Remove |
|---|---|
| Power source | steam |
| Estimated power | 2,163 kW (2,941 PS) |
| Starting effort | 166.9 kN |
Calculated values
| Property | Southern Railway (UK) Merchant Navy class Remove |
|---|---|
| Factor of adhesion | 1 : 3.36 |
| Optimal speed | 79 km/h |
| Power-to-weight ratio | 22.5 kW/t |
| Heating Surface Equivalent | 519.3 m² |
| Cylinder volume/HSE | 1 : 578.13 |
| Adhesive weight/Total | 1 : 1.68 |
| Tractive force/Heating surface | 1 : 11.26 |
| Grate area/Heating surface | 1 : 68.72 |
| Firebox/Tube surface | 1 : 7.91 |
| Total/Superheater | 1 : 2.78 |
