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North Eastern class O
The North Eastern Railway class O was designed by Wilson Worsdell to supplant the 2-4-2T suburban tanks of his brother Thomas. Between 1894 and 1901, 110 were completed at Darlington. They now had the 0-4-4T wheel arr...
| North Eastern class ORemove | |
|---|---|
| Variant | Standard |
| Built | 1894-1901 |
| Manufacturers | Darlington |
| Wheel arrangement | B2 t |
| Gauge | 1435 mm |
| Length | |
| Service mass | 56813 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | North Eastern class O Standard Remove |
|---|---|
| Built | 1894-1901 |
| Manufacturers | Darlington |
| Wheel arrangement | 0-4-4T (Forney) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | North Eastern class O Standard Remove |
|---|---|
| Wheelbase | 6.86 m |
| Service mass | 56.8 t |
| Adhesion mass | 30.5 t |
| Rigid wheelbase | 2.36 m |
| Axle load | 17.6 t |
| Water capacity | 9,093 l |
| Fuel capacity | 3.6 t (coal) |
Boiler
| Property | North Eastern class O Standard Remove |
|---|---|
| Grate area | 1.449 m² |
| Firebox surface | 9.105 m² |
| Tube heating surface | 92.439 m² |
| Evaporative heating surface | 101.543 m² |
| Total heating surface | 101.5 m² |
Power plant
| Property | North Eastern class O Standard Remove |
|---|---|
| Driver diameter | 1,556 mm |
| Boiler pressure | 11 bar |
| Expansion type | simple expansion |
| Cylinders | two, 457 x 610 mm |
Power
| Property | North Eastern class O Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 391 kW (532 PS) |
| Starting effort | 76.8 kN |
Calculated values
| Property | North Eastern class O Standard Remove |
|---|---|
| Factor of adhesion | 1 : 3.89 |
| Optimal speed | 31 km/h |
| Power-to-weight ratio | 6.9 kW/t |
| Heating Surface Equivalent | 147.1 m² |
| Cylinder volume/HSE | 1 : 1,360.99 |
| Adhesive weight/Total | 1 : 1.86 |
| Tractive force/Heating surface | 1 : 15.80 |
| Grate area/Heating surface | 1 : 70.08 |
| Firebox/Tube surface | 1 : 10.15 |
