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Metropolitan class H
The Metropolitan Railway's class H was a tank locomotive for fast passenger services between the suburbs of London and the town of Aylesbury. It was developed as a “double ender” with two driving axles because the 0-6...
General
| Property | Metropolitan class HRemove |
|---|---|
| Built | 1920-1921 |
| Manufacturers | Kerr, Stuart & Co. |
| Wheel arrangement | 4-4-4T (Reading) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Metropolitan class HRemove |
|---|---|
| Length | 12.76 m |
| Wheelbase | 10.21 m |
| Rigid wheelbase | 2.36 m |
| Service weight | 78.2 t |
| Adhesive weight | 39.6 t |
| Axle load | 19.8 t |
| Water capacity | 9,093 l |
| Fuel capacity | 5.1 t (coal) |
Boiler
| Property | Metropolitan class HRemove |
|---|---|
| Grate area | 1.988 m² |
| Firebox surface | 12.263 m² |
| Tube heating surface | 95.226 m² |
| Evaporative heating surface | 107.489 m² |
| Superheater surface | 24.898 m² |
| Total heating surface | 132.4 m² |
Power plant
| Property | Metropolitan class HRemove |
|---|---|
| Driver diameter | 1,753 mm |
| Boiler pressure | 11 bar |
| Expansion type | simple expansion |
| Cylinders | two, 483 x 660 mm |
Power
| Property | Metropolitan class HRemove |
|---|---|
| Power source | steam |
| Estimated power | 690 kW (938 PS) |
| Starting effort | 82.3 kN |
Calculated values
| Property | Metropolitan class HRemove |
|---|---|
| Factor of adhesion | 1 : 4.72 |
| Optimal speed | 51 km/h |
| Power-to-weight ratio | 8.8 kW/t |
| Heating Surface Equivalent | 218.6 m² |
| Cylinder volume/HSE | 1 : 1,105.23 |
| Adhesive weight/Total | 1 : 1.97 |
| Tractive force/Heating surface | 1 : 12.98 |
| Grate area/Heating surface | 1 : 66.59 |
| Firebox/Tube surface | 1 : 7.77 |
| Total/Superheater | 1 : 4.32 |
