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Great Western Railway class 2900 “Saint” and also “Scott”, “Lady” and “Court”
In the search for a modern generation of express locomotives for the GWR, Churchward, who had been appointed chief engineer in 1902, undertook a number of trials. The result of this process was the Saint class, which ...
General
| Property | Great Western Railway class 2900 “Saint” and also “Scott”, “Lady” and “Court” Scott / Lady / Saint |
|---|---|
| Built | 1902-1907 |
| Manufacturers | Swindon |
| Wheel arrangement | 4-6-0 (Ten-wheeler) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Great Western Railway class 2900 “Saint” and also “Scott”, “Lady” and “Court” Scott / Lady / Saint |
|---|---|
| Length | 19.21 m |
| Wheelbase | 8.31 m |
| Rigid wheelbase | 4.50 m |
| Service weight | 71.3 t |
| Adhesive weight | 55.1 t |
| Axle load | 18.3 t |
| Total weight | 115.2 t |
| Water capacity | 18,185 l |
| Fuel capacity | 5.1 t (coal) |
Boiler
| Property | Great Western Railway class 2900 “Saint” and also “Scott”, “Lady” and “Court” Scott / Lady / Saint |
|---|---|
| Grate area | 2.515 m² |
| Firebox surface | 14.331 m² |
| Tube heating surface | 184.76 m² |
| Evaporative heating surface | 199.091 m² |
| Total heating surface | 199.1 m² |
Power plant
| Property | Great Western Railway class 2900 “Saint” and also “Scott”, “Lady” and “Court” Scott / Lady / Saint |
|---|---|
| Driver diameter | 2,045 mm |
| Boiler pressure | 15.5 bar |
| Expansion type | simple expansion |
| Cylinders | two, 457 x 762 mm |
Power
| Property | Great Western Railway class 2900 “Saint” and also “Scott”, “Lady” and “Court” Scott / Lady / Saint |
|---|---|
| Power source | steam |
| Estimated power | 820 kW (1,115 PS) |
| Starting effort | 102.7 kN |
Calculated values
| Property | Great Western Railway class 2900 “Saint” and also “Scott”, “Lady” and “Court” Scott / Lady / Saint |
|---|---|
| Factor of adhesion | 1 : 5.26 |
| Optimal speed | 48 km/h |
| Power-to-weight ratio | 11.5 kW/t |
| Heating Surface Equivalent | 270.7 m² |
| Cylinder volume/HSE | 1 : 924.11 |
| Adhesive weight/Total | 1 : 1.30 |
| Tractive force/Heating surface | 1 : 10.78 |
| Grate area/Heating surface | 1 : 79.16 |
| Firebox/Tube surface | 1 : 12.89 |
