The reference for locomotives and railcars


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North Eastern class S2
London & North Eastern class B15
Great Britain | 1911 | 20 produced
Locomotive Magazine, January 1913

Based on Worsdell's Class S, Raven developed the Class S2, which was intended for mixed service. The first seven locomotives were delivered without a superheater and the remaining 13 with a Robinson-type superheater. The first seven were also retrofitted later, but some also with Schmidt superheaters. The tender had a water scoop device to extend the range. The last built No. 825 was the first locomotive in the British Isles to use uniflow cylinders.

The locomotives were used to pull an express train in one direction and a freight train on the way back. Of the two-axle freight cars that were common at the time, each with a payload of ten tons, up to 80 could be pulled on easy routes and around 50 on hilly routes. The express trains often reached a weight of 350 tons.

The S2 was apparently unpopular with the crews because the boiler did not achieve sufficient evaporation performance if they were not familiar with the machine's peculiarities. The LNER took over all class S2 locomotives as class B15. Their decommissioning took place between 1937 and 1947.

Axle config4-6-0 (Ten-wheeler) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Wheelbase26 ft 0 1/2 in
Fixed wheelbase14 ft
Total wheelbase50 ft 8 1/4 in
Service weight154,224 lbs
Total weight246,288 lbs
Axle load43,344 lbs
Water capacity4,732 us gal
Fuel capacity11,200 lbs (coal)
Power sourcesteam
Estimated power1,050 hp (783 kW)
Optimal speed32 mph
Starting effort21,119 lbf
Power Plant
Driver diameter73.3 in
Boiler pressure175 psi
Expansion typesimple
Cylinderstwo, 20 x 26 in
Grate area23 sq ft
Firebox area140 sq ft
Tube heating area1,229 sq ft
Evaporative heating area1,369 sq ft
Superheater area361 sq ft
Total heating area1,730 sq ft
Calculated Values
steam locomotive
Vincent Raven
last changed: 04/2023

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