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Caledonian Single No. 123
For the 1886 World's Fair in Edinburgh, the Caledonian Railway had a single locomotive built with seven-foot wheels that would be able to travel at a very high average speed. The 4-4-0 of the class 66 by Dugald Drummo...
| Caledonian Single No. 123Remove | |
|---|---|
| Variant | Standard |
| Built | 1886 |
| Manufacturers | Neilson & Co. |
| Wheel arrangement | 2A1 |
| Gauge | 1435 mm |
| Length | |
| Service mass | 42115 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Caledonian Single No. 123 Standard Remove |
|---|---|
| Built | 1886 |
| Manufacturers | Neilson & Co. |
| Wheel arrangement | 4-2-2 (Single) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Caledonian Single No. 123 Standard Remove |
|---|---|
| Wheelbase | 6.43 m |
| Total wheelbase | 12.95 m |
| Empty mass | 38.5 t |
| Service mass | 42.1 t |
| Adhesion mass | 17.3 t |
| Total mass | 75.9 t |
| Axle load | 17.3 t |
| Water capacity | 12,957 l |
| Fuel capacity | 5.1 t (coal) |
Boiler
| Property | Caledonian Single No. 123 Standard Remove |
|---|---|
| Grate area | 1.617 m² |
| Firebox surface | 10.405 m² |
| Tube heating surface | 87.422 m² |
| Evaporative heating surface | 97.827 m² |
| Total heating surface | 97.8 m² |
Power plant
| Property | Caledonian Single No. 123 Standard Remove |
|---|---|
| Driver diameter | 2,134 mm |
| Boiler pressure | 10.3 bar |
| Expansion type | simple expansion |
| Cylinders | two, 457 x 660 mm |
Power
| Property | Caledonian Single No. 123 Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 410 kW (557 PS) |
| Starting effort | 56.9 kN |
Calculated values
| Property | Caledonian Single No. 123 Standard Remove |
|---|---|
| Factor of adhesion | 1 : 2.98 |
| Optimal speed | 43 km/h |
| Power-to-weight ratio | 9.7 kW/t |
| Heating Surface Equivalent | 149.9 m² |
| Cylinder volume/HSE | 1 : 1,447.03 |
| Adhesive weight/Total | 1 : 2.44 |
| Tractive force/Heating surface | 1 : 12.14 |
| Grate area/Heating surface | 1 : 60.50 |
| Firebox/Tube surface | 1 : 8.40 |
