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Metropolitan classes A and B
The Metropolitan Line of the London Underground, which opened in 1863, was in need of steam locomotives that were fitted with a condensation device to reduce the amount of steam emitted. Since initially three-rail tra...
| Metropolitan classes A and BRemove | |
|---|---|
| Variant | |
| Built | 1864-1870 |
| Manufacturers | Beyer, Peacock & Co. |
| Wheel arrangement | 2B t |
| Gauge | 1435 mm |
| Length | |
| Service mass | 42728 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Metropolitan classes A and BRemove |
|---|---|
| Built | 1864-1870 |
| Manufacturers | Beyer, Peacock & Co. |
| Wheel arrangement | 4-4-0T (American) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Metropolitan classes A and BRemove |
|---|---|
| Wheelbase | 6.33 m |
| Service mass | 42.7 t |
| Adhesion mass | 31.5 t |
| Rigid wheelbase | 2.69 m |
| Axle load | 15.8 t |
| Water capacity | 4,546 l |
| Fuel capacity | 0.9 t (coal) |
Boiler
| Property | Metropolitan classes A and BRemove |
|---|---|
| Grate area | 1.765 m² |
| Firebox surface | 9.402 m² |
| Tube heating surface | 84.802 m² |
| Evaporative heating surface | 94.204 m² |
| Total heating surface | 94.2 m² |
Power plant
| Property | Metropolitan classes A and BRemove |
|---|---|
| Driver diameter | 1,537 mm |
| Boiler pressure | 8.3 bar |
| Expansion type | simple expansion |
| Cylinders | two, 406 x 508 mm |
Power
| Property | Metropolitan classes A and BRemove |
|---|---|
| Power source | steam |
| Estimated power | 239 kW (325 PS) |
| Starting effort | 38.4 kN |
Calculated values
| Property | Metropolitan classes A and BRemove |
|---|---|
| Factor of adhesion | 1 : 8.05 |
| Optimal speed | 39 km/h |
| Power-to-weight ratio | 5.6 kW/t |
| Heating Surface Equivalent | 141.2 m² |
| Cylinder volume/HSE | 1 : 933.28 |
| Adhesive weight/Total | 1 : 1.36 |
| Tractive force/Heating surface | 1 : 8.51 |
| Grate area/Heating surface | 1 : 53.37 |
| Firebox/Tube surface | 1 : 9.02 |
