Great Western Railway class 2301 “Dean Goods”
A total of 260 class 2301 freight locomotives built for the GWR between 1883 and 1899 were also known as “Dean Goods” after their designer. They had a Belpaire firebox and, unlike previous GWR locomotives, only had an inside frame. Due to their high tractive power compared to four-coupled locomotives, they were also used for passenger and express trains. From 1908 they received new boilers and cylinders enlarged by half an inch. 20 of them were rebuilt into class 3901 tank locomotives with a 2-6-2T wheel arrangement. In both the First and Second World Wars, they were used by the ROD in France, among other places, and were then partly sent to other countries. British Railways took over 54 locomotives in 1948 and used them mainly on branch lines in Wales due to their low axle loads. The last machine was retired in May 1957.
Technical data
General
| Property | as built | rebuilt |
|---|---|---|
| Built | 1883-1899 | 1908 |
| Manufacturers | Swindon | |
| Wheel arrangement | 0-6-0 (Six-coupled) | |
| Gauge | 1,435 mm (Standard gauge) | |
Dimensions and weights
| Property | as built | rebuilt |
|---|---|---|
| Length | 15.61 m | |
| Wheelbase | 4.75 m | |
| Service mass | 33.8 t | 37.4 t |
| Adhesion mass | 33.8 t | 37.4 t |
| Rigid wheelbase | 4.75 m | |
| Axle load | 13.2 t | |
Boiler
| Property | as built | rebuilt |
|---|---|---|
| Grate area | 1.524 m² | |
| Evaporative heating surface | 110.833 m² | 116.082 m² |
| Total heating surface | 110.8 m² | 116.1 m² |
| Firebox surface | 9.894 m² | |
| Tube heating surface | 106.188 m² | |
Power plant
| Property | as built | rebuilt |
|---|---|---|
| Driver diameter | 1,575 mm | |
| Boiler pressure | 9.7 bar | 12.4 bar |
| Expansion type | simple expansion | |
| Cylinders | two, 432 x 610 mm | two, 444 x 610 mm |
Power
| Property | as built | rebuilt |
|---|---|---|
| Power source | steam | |
| Estimated power | 336 kW (457 PS) | 447 kW (608 PS) |
| Starting effort | 59.2 kN | 80.7 kN |
Calculated values
| Property | as built | rebuilt |
|---|---|---|
| Factor of adhesion | 1 : 5.60 | 1 : 4.55 |
| Optimal speed | 35 km/h | 34 km/h |
| Power-to-weight ratio | 9.9 kW/t | 12.0 kW/t |
| Adhesive weight/Total | 1 : 1.00 | |
| Tractive force/Heating surface | 1 : 11.16 | 1 : 14.52 |
| Grate area/Heating surface | 1 : 72.73 | 1 : 76.17 |
| Heating Surface Equivalent | 165.6 m² | |
| Cylinder volume/HSE | 1 : 1,142.81 | |
| Firebox/Tube surface | 1 : 10.73 | |
