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Caledonian classes 49 and 903 “Cardean”
The Caledonian Railway had to operate many express trains with two 4-4-0 locomotives and also needed a helper locomotive at Beattock Summit. To improve this, McIntosh developed a 4-6-0 in 1903. Initially these were ju...
General
| Property | Caledonian classes 49 and 903 “Cardean” 49 |
|---|---|
| Built | 1903 |
| Manufacturers | St. Rollox |
| Wheel arrangement | 4-6-0 (Ten-wheeler) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Caledonian classes 49 and 903 “Cardean” 49 |
|---|---|
| Wheelbase | 8.74 m |
| Rigid wheelbase | 4.57 m |
| Service weight | 74 t |
| Adhesive weight | 55.9 t |
| Axle load | 18.8 t |
| Total weight | 130.1 t |
| Water capacity | 22,731 l |
| Fuel capacity | 6.1 t (coal) |
Boiler
| Property | Caledonian classes 49 and 903 “Cardean” 49 |
|---|---|
| Grate area | 2.415 m² |
| Firebox surface | 13.471 m² |
| Tube heating surface | 209.497 m² |
| Evaporative heating surface | 222.968 m² |
| Total heating surface | 223.0 m² |
Power plant
| Property | Caledonian classes 49 and 903 “Cardean” 49 |
|---|---|
| Driver diameter | 1,981 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 533 x 660 mm |
Power
| Property | Caledonian classes 49 and 903 “Cardean” 49 |
|---|---|
| Power source | steam |
| Estimated power | 783 kW (1,065 PS) |
| Starting effort | 111.2 kN |
Calculated values
| Property | Caledonian classes 49 and 903 “Cardean” 49 |
|---|---|
| Factor of adhesion | 1 : 4.93 |
| Optimal speed | 43 km/h |
| Power-to-weight ratio | 10.6 kW/t |
| Heating Surface Equivalent | 290.3 m² |
| Cylinder volume/HSE | 1 : 1,016.60 |
| Adhesive weight/Total | 1 : 1.33 |
| Tractive force/Heating surface | 1 : 10.41 |
| Grate area/Heating surface | 1 : 92.33 |
| Firebox/Tube surface | 1 : 15.55 |
