Cambrian Railways class 89
Great Western Railway class 844
Great Britain 1903 15 produced
The Cambrian Railways class 89 comprised 15 0-6-0 freight locomotives designed by Herbert Jones. The first five were built by Robert Stephenson & Co. in 1903. Another five came in 1908 from Beyer, Peacock & Co., which had longer cabs and a slightly larger boiler. The boiler was the same as on the 4-4-0 class 94. The last five followed in 1918 and 1919 from the same manufacturer. From 1924 the GWR began to fit the locomotives with new boilers in Swindon. After one had left service in 1922, the others followed between 1952 and 1954.
Technical data
General
| Property | Robert Stephenson & Co. | Beyer, Peacock & Co. |
|---|---|---|
| Built | 1903 | 1908, 1918-1919 |
| Manufacturers | Robert Stephenson & Co. | Beyer, Peacock & Co. |
| Wheel arrangement | 0-6-0 (Six-coupled) | |
| Gauge | 1,435 mm (Standard gauge) | |
Dimensions and weights
| Property | Robert Stephenson & Co. | Beyer, Peacock & Co. |
|---|---|---|
| Wheelbase | 4.72 m | |
| Service mass | 41.7 t | |
| Adhesion mass | 41.7 t | |
| Total mass | 73.8 t | |
| Rigid wheelbase | 4.72 m | |
| Water capacity | 11,364 l | |
| Fuel capacity | 3 t (coal) | |
Boiler
| Property | Robert Stephenson & Co. | Beyer, Peacock & Co. |
|---|---|---|
| Grate area | 1.905 m² | 1.886 m² |
| Firebox surface | 10.284 m² | 10.87 m² |
| Tube heating surface | 105.101 m² | 108.325 m² |
| Evaporative heating surface | 115.386 m² | 119.195 m² |
| Total heating surface | 115.4 m² | 119.2 m² |
Power plant
| Property | Robert Stephenson & Co. | Beyer, Peacock & Co. |
|---|---|---|
| Driver diameter | 1,562 mm | 1,566 mm |
| Boiler pressure | 11 bar | |
| Expansion type | simple expansion | |
| Cylinders | two, 457 x 660 mm | |
Power
| Property | Robert Stephenson & Co. | Beyer, Peacock & Co. |
|---|---|---|
| Power source | steam | |
| Estimated power | 503 kW (684 PS) | 522 kW (710 PS) |
| Starting effort | 82.9 kN | 82.6 kN |
Calculated values
| Property | Robert Stephenson & Co. | Beyer, Peacock & Co. |
|---|---|---|
| Factor of adhesion | 1 : 4.93 | 1 : 4.95 |
| Optimal speed | 37 km/h | 39 km/h |
| Power-to-weight ratio | 12.1 kW/t | 12.5 kW/t |
| Heating Surface Equivalent | 166.8 m² | 173.5 m² |
| Cylinder volume/HSE | 1 : 1,299.96 | 1 : 1,249.47 |
| Adhesive weight/Total | 1 : 1.00 | |
| Tractive force/Heating surface | 1 : 15.00 | 1 : 14.48 |
| Grate area/Heating surface | 1 : 60.57 | 1 : 63.20 |
| Firebox/Tube surface | 1 : 10.22 | 1 : 9.97 |
