The reference for locomotives and railcars


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Great Central class 9J
London & North Eastern class J11
Great Britain | 1901 | 174 produced
BR 64432 at Mexborough
BR 64432 at Mexborough

The Great Central class 9J consisted of 174 0-6-0 freight locomotives designed by John G. Robinson. Production ran from 1901 to 1910 at the GCR's own Gorton Works and four commercial manufacturers. They were nicknamed “Pom-Poms” because of their exhaust sound, which crews said was reminiscent of the quick-firing Maxim cannon of the same name from the end of the 19th century. In practice, they were not only used in freight service, but also in all types of trains, including express trains.

As early as 1909, the first new locomotive was built with the Robinson superheater. Over the next 30 years, many more were retrofitted with it. At the LNER they became the J11, and after various modifications they were divided into J11/1 to J11/5. From 1942 onwards, Thompson equipped some locomotives with piston valves, which then often reached 60 mph (97 km/h). British Railways took over the entire class, which was ultimately phased out by 1962.

Variantas builtsuperheated
ManufacturerNeilson, Reid & Co., Beyer, Peacock & Co., Gorton, Vulcan Foundry, Yorkshire Engine Co.
Axle config0-6-0T (Six-coupled) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length53 ft 1 13/16 in
Service weight116,368 lbs
Adhesive weight116,368 lbs
Axle load40,320 lbs
Water capacity4,804 us gal
Fuel capacity13,440 lbs (coal)
Power sourcesteam
Starting effort21,959 lbf
Power Plant
Driver diameter62 in
Boiler pressure180 psi
Expansion typesimple
Cylinderstwo, 18 1/2 x 26 in
Grate area19 sq ft
Firebox area130 sq ft
Tube heating area1,322 sq ft1,128 sq ft
Evaporative heating area1,452 sq ft1,258 sq ft
Superheater area139 sq ft
Total heating area1,452 sq ft1,397 sq ft
Calculated Values
steam locomotive
John George Robinson
last changed: 03/2024

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