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Great Western Railway Iron Duke and Rover class
Based on the success of the Firefly class, Daniel Gooch wanted to build an even more powerful and faster express locomotive. The driving wheels were increased from seven to eight feet and the largest possible boiler w...
General
| Property | Great Western Railway Iron Duke and Rover class Iron Duke |
|---|---|
| Built | 1847-1855 |
| Manufacturers | Swindon |
| Wheel arrangement | 4-2-2 (Single) |
| Gauge | 2,140 mm (GWR broad gauge) |
Dimensions and weights
| Property | Great Western Railway Iron Duke and Rover class Iron Duke |
|---|---|
| Wheelbase | 5.69 m |
| Rigid wheelbase | 5.69 m |
| Service weight | 38.8 t |
| Adhesive weight | 14.4 t |
| Axle load | 14.4 t |
| Water capacity | 8,184 l |
Boiler
| Property | Great Western Railway Iron Duke and Rover class Iron Duke |
|---|---|
| Grate area | 2.365 m² |
| Firebox surface | 12.245 m² |
| Tube heating surface | 148.292 m² |
| Evaporative heating surface | 160.537 m² |
| Total heating surface | 160.5 m² |
Power plant
| Property | Great Western Railway Iron Duke and Rover class Iron Duke |
|---|---|
| Driver diameter | 2,438 mm |
| Boiler pressure | 8.3 bar |
| Expansion type | simple expansion |
| Cylinders | two, 457 x 610 mm |
Power
| Property | Great Western Railway Iron Duke and Rover class Iron Duke |
|---|---|
| Power source | steam |
| Estimated power | 298 kW (405 PS) |
| Top speed | 129 km/h |
| Starting effort | 36.8 kN |
Calculated values
| Property | Great Western Railway Iron Duke and Rover class Iron Duke |
|---|---|
| Factor of adhesion | 1 : 3.85 |
| Optimal speed | 50 km/h |
| Power-to-weight ratio | 7.7 kW/t |
| Heating Surface Equivalent | 221.8 m² |
| Cylinder volume/HSE | 1 : 902.59 |
| Adhesive weight/Total | 1 : 2.69 |
| Tractive force/Heating surface | 1 : 4.78 |
| Grate area/Heating surface | 1 : 67.88 |
| Firebox/Tube surface | 1 : 12.11 |
