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British Rail Standard class 5MT
When developing a class 5 standard locomotive for mixed service, a Pacific locomotive first came up for discussion. However, since this was considered too expensive, the choice fell on the wheel arrangement 4-6-0. Thi...
| British Rail Standard class 5MTRemove | |
|---|---|
| Variant | with tender BR1F |
| Built | 1951-1957 |
| Manufacturers | Derby;Doncaster |
| Wheel arrangement | 2C |
| Gauge | 1435 mm |
| Length | 19075 mm |
| Service mass | 77220 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | British Rail Standard class 5MTwith tender BR1F |
|---|---|
| Built | 1951-1957 |
| Manufacturers | Derby, Doncaster |
| Wheel arrangement | 4-6-0 (Ten-wheeler) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | British Rail Standard class 5MTwith tender BR1F |
|---|---|
| Length | 19.08 m |
| Wheelbase | 8.31 m |
| Service mass | 77.2 t |
| Adhesion mass | 59 t |
| Total mass | 133.3 t |
| Rigid wheelbase | 4.72 m |
| Axle load | 20 t |
| Water capacity | 19,321 l |
| Fuel capacity | 7.1 t (coal) |
Boiler
| Property | British Rail Standard class 5MTwith tender BR1F |
|---|---|
| Grate area | 2.666 m² |
| Firebox surface | 15.886 m² |
| Tube heating surface | 137.404 m² |
| Evaporative heating surface | 153.29 m² |
| Superheater surface | 33.259 m² |
| Total heating surface | 186.5 m² |
Power plant
| Property | British Rail Standard class 5MTwith tender BR1F |
|---|---|
| Driver diameter | 1,880 mm |
| Boiler pressure | 15.5 bar |
| Expansion type | simple expansion |
| Cylinders | two, 483 x 711 mm |
Power
| Property | British Rail Standard class 5MTwith tender BR1F |
|---|---|
| Power source | steam |
| Estimated power | 1,380 kW (1,876 PS) |
| Starting effort | 116.2 kN |
Calculated values
| Property | British Rail Standard class 5MTwith tender BR1F |
|---|---|
| Factor of adhesion | 1 : 4.98 |
| Optimal speed | 72 km/h |
| Power-to-weight ratio | 17.9 kW/t |
| Heating Surface Equivalent | 299.2 m² |
| Cylinder volume/HSE | 1 : 869.50 |
| Adhesive weight/Total | 1 : 1.31 |
| Tractive force/Heating surface | 1 : 13.01 |
| Grate area/Heating surface | 1 : 69.97 |
| Firebox/Tube surface | 1 : 8.65 |
| Total/Superheater | 1 : 4.61 |
