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Great Western Railway class 4500 “Small Prairie”
Analogous to the “Large Prairies”, Churchward had a smaller engine built in 1905, which was given the number 115 and founded the “Small Prairies” family. With a driving wheel diameter of four feet and 1.5 inches, smal...
| Great Western Railway class 4500 “Small Prairie”Remove | |
|---|---|
| Variant | Standard |
| Built | 1906-1915 |
| Manufacturers | Swindon |
| Wheel arrangement | 1C1 t |
| Gauge | 1435 mm |
| Length | |
| Service mass | 63198 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Great Western Railway class 4500 “Small Prairie” Standard Remove |
|---|---|
| Built | 1906-1915 |
| Manufacturers | Swindon |
| Wheel arrangement | 2-6-2T (Prairie) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Great Western Railway class 4500 “Small Prairie” Standard Remove |
|---|---|
| Wheelbase | 9.68 m |
| Empty mass | 57.9 t |
| Service mass | 63.2 t |
| Adhesion mass | 48.7 t |
| Rigid wheelbase | 4.50 m |
| Water capacity | 4,546 l |
| Fuel capacity | 3 t (coal) |
Boiler
| Property | Great Western Railway class 4500 “Small Prairie” Standard Remove |
|---|---|
| Grate area | 1.542 m² |
| Firebox surface | 8.756 m² |
| Tube heating surface | 92.23 m² |
| Evaporative heating surface | 100.986 m² |
| Superheater surface | 7.154 m² |
| Total heating surface | 108.1 m² |
Power plant
| Property | Great Western Railway class 4500 “Small Prairie” Standard Remove |
|---|---|
| Driver diameter | 1,410 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 432 x 610 mm |
Power
| Property | Great Western Railway class 4500 “Small Prairie” Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 634 kW (862 PS) |
| Starting effort | 94.5 kN |
Calculated values
| Property | Great Western Railway class 4500 “Small Prairie” Standard Remove |
|---|---|
| Factor of adhesion | 1 : 5.06 |
| Optimal speed | 42 km/h |
| Power-to-weight ratio | 10.0 kW/t |
| Heating Surface Equivalent | 159.1 m² |
| Cylinder volume/HSE | 1 : 1,122.36 |
| Adhesive weight/Total | 1 : 1.30 |
| Tractive force/Heating surface | 1 : 18.25 |
| Grate area/Heating surface | 1 : 70.13 |
| Firebox/Tube surface | 1 : 10.53 |
| Total/Superheater | 1 : 14.12 |
