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The reference for locomotives and railcars

British Rail Standard class 2

Great Britain 1952 65 produced
flickr/Historical Railway Images PD

The team around Riddles designed the class 2 with the wheel arrangement 2-6-0 as the smallest tender locomotive among the standard classes. It was designed for use with all types of trains on branch lines and therefore had an axle load of less than 14 tons. So it had the route availability 3, i.e. the lowest category, which means it could be used on all lines.

The basis was the LMS Ivatt class 2 2-6-0. Since the LMS had a larger loading gauge than many other British railways, it had to be fitted with a smaller cab. In order to improve the working conditions for the crew when reversing, the type BR3 tender was fitted with weather protection. The fittings on the boiler have been adapted to the standard program.

In the first few months, the LMS locomotive and the standard locomotive were built in Darlington at the same time. The standard locomotive earned the nickname “Mickey Mouse” because it was quite powerful despite its small size. As planned, it was used on branch lines with passenger and freight trains and for shunting. Although Riddles had put great effort in the working conditions during development, the cab was apparently drafty and a lot of dirt quickly accumulated. Most machines were withdrawn between 1965 and 1967. Today four units are still preserved, one of which is being converted into a standard class 2 tank variant.

Technical data

General

Built
1952-1956
Manufacturers
Darlington
Wheel arrangement
2-6-0 (Mogul)
Gauge
1,435 mm (Standard gauge)

Dimensions and weights

Length
16.22 m
Wheelbase
6.78 m
Service mass
50 t
Adhesion mass
41.2 t
Total mass
87.4 t
Rigid wheelbase
4.19 m
Axle load
14 t
Water capacity
13,627 l
Fuel capacity
4.1 t (coal)

Boiler

Grate area
1.626 m²
Firebox surface
9.383 m²
Tube heating surface
85.842 m²
Evaporative heating surface
95.226 m²
Superheater surface
11.52 m²
Total heating surface
106.7 m²

Power plant

Driver diameter
1,524 mm
Boiler pressure
13.8 bar
Expansion type
simple expansion
Cylinders
two, 419 x 610 mm

Power

Power source
steam
Estimated power
634 kW (862 PS)
Starting effort
82.3 kN

Calculated values

Factor of adhesion
1 : 4.90
Optimal speed
47 km/h
Power-to-weight ratio
12.7 kW/t
Heating Surface Equivalent
165.2 m²
Cylinder volume/HSE
1 : 1,018.22
Adhesive weight/Total
1 : 1.21
Tractive force/Heating surface
1 : 16.11
Grate area/Heating surface
1 : 65.65
Firebox/Tube surface
1 : 9.15
Total/Superheater
1 : 8.27
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