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North British class H
When the North British Railway needed new express locomotives which were much more powerful than the existing 4-4-0, William Reid developed the Atlantic that was later called class H. It was the only five-axle tender ...
| North British class HRemove | |
|---|---|
| Variant | rebuilt C11 |
| Built | 1915-1925 |
| Manufacturers | North British;Robert Stephenson & Co. |
| Wheel arrangement | 2B1 |
| Gauge | 1435 mm |
| Length | 17983 mm |
| Service mass | 76000 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | North British class Hrebuilt C11 |
|---|---|
| Built | 1915-1925 |
| Manufacturers | North British, Robert Stephenson & Co. |
| Wheel arrangement | 4-4-2 (Atlantic) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | North British class Hrebuilt C11 |
|---|---|
| Length | 17.98 m |
| Wheelbase | 8.47 m |
| Total wheelbase | 16.21 m |
| Service mass | 76 t |
| Adhesion mass | 40.6 t |
| Total mass | 122.1 t |
| Rigid wheelbase | 2.24 m |
| Axle load | 20.3 t |
| Water capacity | 19,275 l |
| Fuel capacity | 7.1 t (coal) |
Boiler
| Property | North British class Hrebuilt C11 |
|---|---|
| Grate area | 2.648 m² |
| Firebox surface | 17.168 m² |
| Tube heating surface | 150.429 m² |
| Evaporative heating surface | 167.597 m² |
| Superheater surface | 24.434 m² |
| Total heating surface | 192.0 m² |
Power plant
| Property | North British class Hrebuilt C11 |
|---|---|
| Driver diameter | 2,057 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | simple expansion |
| Cylinders | two, 533 x 711 mm |
Power
| Property | North British class Hrebuilt C11 |
|---|---|
| Power source | steam |
| Estimated power | 969 kW (1,317 PS) |
| Starting effort | 103.8 kN |
Calculated values
| Property | North British class Hrebuilt C11 |
|---|---|
| Factor of adhesion | 1 : 3.84 |
| Optimal speed | 58 km/h |
| Power-to-weight ratio | 12.8 kW/t |
| Heating Surface Equivalent | 302.3 m² |
| Cylinder volume/HSE | 1 : 1,051.41 |
| Adhesive weight/Total | 1 : 1.87 |
| Tractive force/Heating surface | 1 : 11.28 |
| Grate area/Heating surface | 1 : 72.52 |
| Firebox/Tube surface | 1 : 8.76 |
| Total/Superheater | 1 : 6.86 |
