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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...
General
| Property | Caledonian classes 113 and 72 “Dunalastair V” Remove |
|---|---|
| Built | 1916 |
| Manufacturers | St. Rollox, Armstrong Whitworth, North British |
| Wheel arrangement | 4-4-0 (American) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Caledonian classes 113 and 72 “Dunalastair V” Remove |
|---|---|
| Wheelbase | 7.42 m |
| Rigid wheelbase | 2.97 m |
| Service weight | 62.2 t |
| Adhesive weight | 40.4 t |
| Axle load | 20.2 t |
| Total weight | 109.5 t |
| Water capacity | 19,094 l |
| Fuel capacity | 6.7 t (coal) |
Boiler
| Property | Caledonian classes 113 and 72 “Dunalastair V” Remove |
|---|---|
| Grate area | 1.858 m² |
| Firebox surface | 13.471 m² |
| Tube heating surface | 113.342 m² |
| Evaporative heating surface | 126.813 m² |
| Superheater surface | 27.406 m² |
| Total heating surface | 154.2 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, 508 x 660 mm |
Power
| Property | Caledonian classes 113 and 72 “Dunalastair V” Remove |
|---|---|
| Power source | steam |
| Estimated power | 783 kW (1,065 PS) |
| Starting effort | 90.7 kN |
Calculated values
| Property | Caledonian classes 113 and 72 “Dunalastair V” Remove |
|---|---|
| Factor of adhesion | 1 : 4.37 |
| Optimal speed | 53 km/h |
| Power-to-weight ratio | 12.6 kW/t |
| Heating Surface Equivalent | 249.0 m² |
| Cylinder volume/HSE | 1 : 1,075.20 |
| Adhesive weight/Total | 1 : 1.54 |
| Tractive force/Heating surface | 1 : 12.29 |
| Grate area/Heating surface | 1 : 83.00 |
| Firebox/Tube surface | 1 : 8.41 |
| Total/Superheater | 1 : 4.63 |
