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Great Central class 1B
London & North Eastern classes L1 and L3
Great Britain | 1914 | 20 produced
flickr/Historical Railway Images

In the 1910s the Great Central Railway needed new tank locomotives to serve coal traffic between the mining areas of Nottinghamshire and Derbyshire and the port at Immingham. Due to the good experiences with the class D of the Lancashire, Derbyshire and East Coast Railway, which had the wheel arrangement 0-6-4T, this was used as a basis.

It received a larger superheated boiler similar to that of the 4-4-0 class 11E. In order to be able to carry this, a leading axle was added. The result was the class 1B, which was the first standard gauge British 2-6-4T tank locomotive. With a coal capacity of 4.5 tons and 3,000 gallons of water, the supplies were not much smaller than most British tender locomotives

In everyday life it turned out that the frame was severely stressed by the position of the inside cylinders. In addition, the braking power was hardly sufficient for use with coal trains in the intended area. Since coal traffic there was ultimately declining, they were used in coal traffic in flatter areas. At the LNER they were first called class L1 and renamed L3 in 1945 due to another locomotive. 19 of the 20 came to British Railways and were withdrawn by 1955.

General
Built1914-1917
ManufacturerGorton
Axle config2-6-4T (Adriatic) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length46 ft 4 3/4 in
Wheelbase37 ft 6 in
Fixed wheelbase17 ft
Service weight215,936 lbs
Adhesive weight131,600 lbs
Axle load44,800 lbs
Water capacity3,603 us gal
Fuel capacity10,080 lbs (coal)
Power
Power sourcesteam
Estimated power1,100 hp (820 kW)
Optimal speed24 mph
Starting effort28,759 lbf
Power Plant
Driver diameter61 in
Boiler pressure180 psi
Expansion typesimple
Cylinderstwo, 21 x 26 in
Boiler
Grate area26.5 sq ft
Firebox area157 sq ft
Tube heating area1,386.5 sq ft
Evaporative heating area1,543.5 sq ft
Superheater area209 sq ft
Total heating area1,752.5 sq ft
Calculated Values
steam locomotive
freight
tank locomotive
John George Robinson
last changed: 03/2024
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