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British Rail Standard class 2
Great Britain | 1952 | 65 produced
No. 78018 in November 2016 at Leicester North railway station
No. 78018 in November 2016 at Leicester North railway station
PeterSkuce

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 in front of 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 retired between 1965 and 1967. Today four units are still preserved, one of which is being converted into a standard class 2 tank variant.

General
Built1952-1956
ManufacturerDarlington
Axle config2-6-0 (Mogul) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length53 ft 2 1/2 in
Wheelbase22 ft 3 in
Fixed wheelbase13 ft 9 in
Service weight110,208 lbs
Adhesive weight90,720 lbs
Total weight192,752 lbs
Axle load30,800 lbs
Water capacity3,600 us gal
Fuel capacity8,960 lbs (coal)
Power
Power sourcesteam
Estimated power850 hp (634 kW)
Optimal speed29 mph
Starting effort18,513 lbf
Power Plant
Driver diameter60 in
Boiler pressure200 psi
Expansion typesimple
Cylinderstwo, 16 1/2 x 24 in
Boiler
Grate area17.5 sq ft
Firebox area101 sq ft
Tube heating area924 sq ft
Evaporative heating area1,025 sq ft
Superheater area124 sq ft
Total heating area1,149 sq ft
Calculated Values
steam locomotive
passenger
freight
Robert Arthur Riddles
last changed: 01/2023
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