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Caledonian classes 812 and 652
The Caledonian Railway's class 812 comprised 79 0-6-0 freight locomotives, which McIntosh had developed as a successor to his “Jumbos”. They differed primarily in their larger boiler and longer wheelbase. The boiler w...
General
| Property | Caledonian classes 812 and 652Remove |
|---|---|
| Built | 1899-1900, 1908-1909 |
| Manufacturers | Dübs & Co., Neilson, Reid & Co., Sharp, Stewart & Co., St. Rollox |
| Wheel arrangement | 0-6-0 (Six-coupled) |
| Gauge | 1,435 mm (Standard gauge) |
Dimensions and weights
| Property | Caledonian classes 812 and 652Remove |
|---|---|
| Length | 17.12 m |
| Wheelbase | 5.11 m |
| Rigid wheelbase | 5.11 m |
| Service weight | 46.4 t |
| Adhesive weight | 46.4 t |
| Axle load | 17 t |
| Total weight | 84.9 t |
| Water capacity | 13,639 l |
| Fuel capacity | 5.1 t (coal) |
Boiler
| Property | Caledonian classes 812 and 652Remove |
|---|---|
| Grate area | 1.917 m² |
| Firebox surface | 11.035 m² |
| Tube heating surface | 119.308 m² |
| Evaporative heating surface | 130.343 m² |
| Total heating surface | 130.3 m² |
Power plant
| Property | Caledonian classes 812 and 652Remove |
|---|---|
| Driver diameter | 1,524 mm |
| Boiler pressure | 11 bar |
| Expansion type | simple expansion |
| Cylinders | two, 470 x 660 mm |
Power
| Property | Caledonian classes 812 and 652Remove |
|---|---|
| Power source | steam |
| Estimated power | 522 kW (710 PS) |
| Starting effort | 89.7 kN |
Calculated values
| Property | Caledonian classes 812 and 652Remove |
|---|---|
| Factor of adhesion | 1 : 5.08 |
| Optimal speed | 35 km/h |
| Power-to-weight ratio | 11.2 kW/t |
| Heating Surface Equivalent | 185.5 m² |
| Cylinder volume/HSE | 1 : 1,234.67 |
| Adhesive weight/Total | 1 : 1.00 |
| Tractive force/Heating surface | 1 : 14.38 |
| Grate area/Heating surface | 1 : 67.99 |
| Firebox/Tube surface | 1 : 10.81 |
