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North Eastern class R
Developed by Wilson Worsdell, the Class R was a 4-4-0 with larger dimensions than had previously been the norm for this wheel arrangement in Britain. From 1899 30 were built and another 30 in 1906 and 1907. During Wor...
General
| Property | North Eastern class R as built |
|---|---|
| Built | 1899-1907 |
| Manufacturers | Gateshead |
| Wheel arrangement | 4-4-0 (American) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | North Eastern class R as built |
|---|---|
| Wheelbase | 7.24 m |
| Rigid wheelbase | 2.90 m |
| Total wheelbase | 14.10 m |
| Service weight | 52.5 t |
| Adhesive weight | 35.8 t |
| Axle load | 20 t |
| Total weight | 91 t |
| Water capacity | 16,080 l |
| Fuel capacity | 5.1 t (coal) |
Boiler
| Property | North Eastern class R as built |
|---|---|
| Grate area | 1.858 m² |
| Firebox surface | 13.378 m² |
| Tube heating surface | 128.485 m² |
| Evaporative heating surface | 141.863 m² |
| Total heating surface | 141.9 m² |
Power plant
| Property | North Eastern class R as built |
|---|---|
| Driver diameter | 2,083 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 483 x 660 mm |
Power
| Property | North Eastern class R as built |
|---|---|
| Power source | steam |
| Estimated power | 615 kW (836 PS) |
| Starting effort | 86.6 kN |
Calculated values
| Property | North Eastern class R as built |
|---|---|
| Factor of adhesion | 1 : 4.06 |
| Optimal speed | 43 km/h |
| Power-to-weight ratio | 11.7 kW/t |
| Heating Surface Equivalent | 208.8 m² |
| Cylinder volume/HSE | 1 : 1,157.36 |
| Adhesive weight/Total | 1 : 1.47 |
| Tractive force/Heating surface | 1 : 12.74 |
| Grate area/Heating surface | 1 : 76.35 |
| Firebox/Tube surface | 1 : 9.60 |
