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Caledonian classes 113 and 72 “Dunalastair V”
In 1916, William Pickersgill had 16 class 72 4-4-0 express locomotives built. From 1920, 32 more class 113 locomotives followed, which had a slightly smaller boiler and slightly larger cylinders. Technically, they cou...
| Caledonian classes 113 and 72 “Dunalastair V”Remove | |
|---|---|
| Variant | |
| Built | 1920-1922 |
| Manufacturers | St. Rollox;Armstrong Whitworth;North British |
| Wheel arrangement | 2B |
| Gauge | 1435 mm |
| Length | |
| Service mass | 62233 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Caledonian classes 113 and 72 “Dunalastair V”Remove |
|---|---|
| Built | 1920-1922 |
| Manufacturers | St. Rollox, Armstrong Whitworth, North British |
| Wheel arrangement | 4-4-0 (American) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Caledonian classes 113 and 72 “Dunalastair V”Remove |
|---|---|
| Wheelbase | 7.42 m |
| Service mass | 62.2 t |
| Adhesion mass | 40.4 t |
| Total mass | 104.2 t |
| Rigid wheelbase | 2.97 m |
| Axle load | 20.2 t |
| Water capacity | 19,094 l |
| Fuel capacity | 6.7 t (coal) |
Boiler
| Property | Caledonian classes 113 and 72 “Dunalastair V”Remove |
|---|---|
| Grate area | 1.923 m² |
| Firebox surface | 13.378 m² |
| Tube heating surface | 110.09 m² |
| Evaporative heating surface | 123.468 m² |
| Superheater surface | 18.581 m² |
| Total heating surface | 142.0 m² |
Power plant
| Property | Caledonian classes 113 and 72 “Dunalastair V”Remove |
|---|---|
| Driver diameter | 1,981 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | simple expansion |
| Cylinders | two, 521 x 660 mm |
Power
| Property | Caledonian classes 113 and 72 “Dunalastair V”Remove |
|---|---|
| Power source | steam |
| Estimated power | 746 kW (1,014 PS) |
| Starting effort | 95.3 kN |
Calculated values
| Property | Caledonian classes 113 and 72 “Dunalastair V”Remove |
|---|---|
| Factor of adhesion | 1 : 4.16 |
| Optimal speed | 48 km/h |
| Power-to-weight ratio | 12.0 kW/t |
| Heating Surface Equivalent | 227.5 m² |
| Cylinder volume/HSE | 1 : 1,236.18 |
| Adhesive weight/Total | 1 : 1.54 |
| Tractive force/Heating surface | 1 : 14.02 |
| Grate area/Heating surface | 1 : 73.87 |
| Firebox/Tube surface | 1 : 8.23 |
| Total/Superheater | 1 : 6.64 |
