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The reference for locomotives and railcars

Great Western Railway class 2600 “Aberdare”

Great Britain 1900 80 produced

For the coal traffic between Aberdare and Swindon, the GWR had 81 2-6-0 locomotives built from 1900 onwards, also called the “Aberdare class”. It was built under Dean and the first to be built, number 33, still had a conventional boiler with a Belpaire firebox, which the 4-4-0 express train locomotives of the Bulldog class also had. All others already got Churchward's tapered boiler. The last nine were rebuilds of the class 2602 “Kruger”.

A striking feature was the massive outside frame. The first ones received a superheater as early as 1908. The first withdrawals took place from 1934, but some were reactivated again during the Second World War. There were twelve remaining when British Railways was founded, but they disappeared by 1949.

Technical data

General

Property as built superheated
Built 1900-1906
Manufacturers Swindon
Wheel arrangement 2-6-0 (Mogul)
Gauge 1,435 mm (Standard gauge)

Dimensions and weights

Property as built superheated
Wheelbase 6.86 m
Total wheelbase 13.92 m
Service mass 54.3 t 57.7 t
Adhesion mass 47.6 t 50.4 t
Total mass 87.3 t 106.1 t
Rigid wheelbase 4.57 m
Axle load 16.1 t 17.8 t
Water capacity 13,639 l 18,185 l

Boiler

Property as built superheated
Grate area 1.999 m² 1.91 m²
Firebox surface 11.589 m² 11.957 m²
Tube heating surface 142.891 m² 125.354 m²
Evaporative heating surface 154.479 m² 137.311 m²
Total heating surface 154.5 m² 160.5 m²
Superheater surface 23.226 m²

Power plant

Property as built superheated
Driver diameter 1,410 mm
Boiler pressure 13.8 bar
Expansion type simple expansion
Cylinders two, 457 x 660 mm

Power

Property as built superheated
Power source steam
Estimated power 615 kW (836 PS) 783 kW (1,065 PS)
Starting effort 114.8 kN

Calculated values

Property as built superheated
Factor of adhesion 1 : 4.06 1 : 4.31
Optimal speed 32 km/h 42 km/h
Power-to-weight ratio 11.3 kW/t 13.6 kW/t
Heating Surface Equivalent 212.4 m² 243.5 m²
Cylinder volume/HSE 1 : 1,020.78 1 : 890.34
Adhesive weight/Total 1 : 1.14
Tractive force/Heating surface 1 : 15.52 1 : 14.93
Grate area/Heating surface 1 : 77.28 1 : 84.05
Firebox/Tube surface 1 : 12.33 1 : 10.48
Total/Superheater 1 : 5.91
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