Compare locomotives
Add a locomotive
Great Western Railway class 455 “Metropolitan Tanks”
For the Metropolitan and District Lines in London, Joseph Armstrong designed the class 355, also known as “Metropolitan Tanks” or simply “Metro Tanks”. It was created with a driving wheel diameter of just five feet to...
| Great Western Railway class 455 “Metropolitan Tanks”Remove | |
|---|---|
| Variant | Dean 1881 |
| Built | 1881-1899 |
| Manufacturers | Swindon |
| Wheel arrangement | 1B wt |
| Gauge | 1435 mm |
| Length | |
| Service mass | 40236 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Great Western Railway class 455 “Metropolitan Tanks”Dean 1881 |
|---|---|
| Built | 1881-1899 |
| Manufacturers | Swindon |
| Wheel arrangement | 2-4-0WT (Porter) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Great Western Railway class 455 “Metropolitan Tanks”Dean 1881 |
|---|---|
| Wheelbase | 4.65 m |
| Service mass | 40.2 t |
| Adhesion mass | 28.4 t |
| Rigid wheelbase | 2.44 m |
| Axle load | 14.2 t |
| Water capacity | 5,001 l |
| Fuel capacity | 2 t (coal) |
Boiler
| Property | Great Western Railway class 455 “Metropolitan Tanks”Dean 1881 |
|---|---|
| Grate area | 1.524 m² |
| Firebox surface | 9.197 m² |
| Tube heating surface | 112.32 m² |
| Evaporative heating surface | 121.517 m² |
| Total heating surface | 121.5 m² |
Power plant
| Property | Great Western Railway class 455 “Metropolitan Tanks”Dean 1881 |
|---|---|
| Driver diameter | 1,524 mm |
| Boiler pressure | 10.3 bar |
| Expansion type | simple expansion |
| Cylinders | two, 406 x 610 mm |
Power
| Property | Great Western Railway class 455 “Metropolitan Tanks”Dean 1881 |
|---|---|
| Power source | steam |
| Estimated power | 373 kW (507 PS) |
| Starting effort | 58.1 kN |
Calculated values
| Property | Great Western Railway class 455 “Metropolitan Tanks”Dean 1881 |
|---|---|
| Factor of adhesion | 1 : 4.81 |
| Optimal speed | 39 km/h |
| Power-to-weight ratio | 9.3 kW/t |
| Heating Surface Equivalent | 167.5 m² |
| Cylinder volume/HSE | 1 : 944.17 |
| Adhesive weight/Total | 1 : 1.41 |
| Tractive force/Heating surface | 1 : 9.98 |
| Grate area/Heating surface | 1 : 79.74 |
| Firebox/Tube surface | 1 : 12.21 |
