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Great Western Railway class 5100 “Large Prairie”
One of George Jackson Churchward's first designs for the GWR was a 2-6-2T passenger tank locomotive intended for suburban service. The Prototype number 99 was completed in 1903 and formed the basis of a family of simi...
| Great Western Railway class 5100 “Large Prairie”Remove | |
|---|---|
| Variant | 5100 |
| Built | 1903 |
| Manufacturers | Swindon |
| Wheel arrangement | 1C1 t |
| Gauge | 1435 mm |
| Length | 12497 mm |
| Service mass | 76712 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Great Western Railway class 5100 “Large Prairie”5100 |
|---|---|
| Built | 1903 |
| Manufacturers | Swindon |
| Wheel arrangement | 2-6-2T (Prairie) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Great Western Railway class 5100 “Large Prairie”5100 |
|---|---|
| Length | 12.50 m |
| Wheelbase | 9.68 m |
| Service mass | 76.7 t |
| Adhesion mass | 54.9 t |
| Rigid wheelbase | 4.50 m |
| Axle load | 17.9 t |
| Water capacity | 9,093 l |
| Fuel capacity | 4.6 t (coal) |
Boiler
| Property | Great Western Railway class 5100 “Large Prairie”5100 |
|---|---|
| Grate area | 1.891 m² |
| Firebox surface | 11.316 m² |
| Tube heating surface | 106.393 m² |
| Evaporative heating surface | 117.708 m² |
| Superheater surface | 7.618 m² |
| Total heating surface | 125.3 m² |
Power plant
| Property | Great Western Railway class 5100 “Large Prairie”5100 |
|---|---|
| Driver diameter | 1,727 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 470 x 762 mm |
Power
| Property | Great Western Railway class 5100 “Large Prairie”5100 |
|---|---|
| Power source | steam |
| Estimated power | 764 kW (1,039 PS) |
| Starting effort | 114.2 kN |
Calculated values
| Property | Great Western Railway class 5100 “Large Prairie”5100 |
|---|---|
| Factor of adhesion | 1 : 4.72 |
| Optimal speed | 40 km/h |
| Power-to-weight ratio | 10.0 kW/t |
| Heating Surface Equivalent | 189.5 m² |
| Cylinder volume/HSE | 1 : 1,394.50 |
| Adhesive weight/Total | 1 : 1.40 |
| Tractive force/Heating surface | 1 : 19.03 |
| Grate area/Heating surface | 1 : 66.27 |
| Firebox/Tube surface | 1 : 9.40 |
| Total/Superheater | 1 : 15.45 |
