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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...
| Caledonian classes 49 and 903 “Cardean”Remove | |
|---|---|
| Variant | 903 |
| Built | 1906 |
| Manufacturers | St. Rollox |
| Wheel arrangement | 2C |
| Gauge | 1435 mm |
| Length | |
| Service mass | 73059 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Caledonian classes 49 and 903 “Cardean”903 |
|---|---|
| Built | 1906 |
| Manufacturers | St. Rollox |
| Wheel arrangement | 4-6-0 (Ten-wheeler) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Caledonian classes 49 and 903 “Cardean”903 |
|---|---|
| Wheelbase | 8.74 m |
| Total wheelbase | 17.32 m |
| Service mass | 73.1 t |
| Adhesion mass | 55.4 t |
| Total mass | 131 t |
| Rigid wheelbase | 4.57 m |
| Water capacity | 22,731 l |
| Fuel capacity | 5.1 t (coal) |
Boiler
| Property | Caledonian classes 49 and 903 “Cardean”903 |
|---|---|
| Grate area | 2.415 m² |
| Firebox surface | 13.471 m² |
| Tube heating surface | 215.071 m² |
| Evaporative heating surface | 228.542 m² |
| Total heating surface | 228.5 m² |
Power plant
| Property | Caledonian classes 49 and 903 “Cardean”903 |
|---|---|
| Driver diameter | 1,981 mm |
| Boiler pressure | 13.8 bar |
| Expansion type | simple expansion |
| Cylinders | two, 508 x 660 mm |
Power
| Property | Caledonian classes 49 and 903 “Cardean”903 |
|---|---|
| Power source | steam |
| Estimated power | 790 kW (1,074 PS) |
| Starting effort | 100.8 kN |
Calculated values
| Property | Caledonian classes 49 and 903 “Cardean”903 |
|---|---|
| Factor of adhesion | 1 : 5.39 |
| Optimal speed | 48 km/h |
| Power-to-weight ratio | 10.8 kW/t |
| Heating Surface Equivalent | 295.9 m² |
| Cylinder volume/HSE | 1 : 904.72 |
| Adhesive weight/Total | 1 : 1.32 |
| Tractive force/Heating surface | 1 : 9.21 |
| Grate area/Heating surface | 1 : 94.63 |
| Firebox/Tube surface | 1 : 15.97 |
