NER Class S1

The NER Class S1 (LNER Class B14) was a class of 4-6-0 steam locomotives of the North Eastern Railway. It was designed by Wilson Worsdell and five locomotives were built between 1900 and 1901 at Gateshead works. The S1 was similar to the NER Class S but had larger driving wheels and a higher boiler pressure.[1]

NER Class S1
LNER Class B14
Type and origin
Power typeSteam
DesignerWilson Worsdell
Build date1900-1901
Total produced5
Specifications
Configuration:
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 • Whyte4-6-0
Leading dia.3 ft 7 1⁄4 in (1.099 m)
Driver dia.6 ft 8 1⁄4 in (2.038 m)
Wheelbase27 ft 6 in (8.38 m) engine
12 ft 8 in (3.86 m) tender
51 ft 6 3⁄4 in (15.716 m) total
Axle load19.5 long tons (19.8 t)
Loco weight67.1 long tons (68.2 t)
Tender weight41.1 long tons (41.8 t)
Total weight108.2 long tons (109.9 t)
Firebox:
 • Firegrate area		23 sq ft (2.1 m2)
Boiler4 ft 9 in (1.45 m)
Boiler pressure175 psi (1.21 MPa)
Heating surface1,750 sq ft (163 m2)
 • Tubes935 sq ft (86.9 m2)
 • Flues401 sq ft (37.3 m2)
 • Firebox120 sq ft (11 m2)
Superheater:
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 • Heating area294 sq ft (27.3 m2)
Cylinders2 (outside)
Cylinder size20 in × 26 in (510 mm × 660 mm)
Valve gearStephenson
Performance figures
Tractive effort19,310 lbf (85.9 kN)
Career
OperatorsNorth Eastern Railway, London & North Eastern Railway
Dispositionall scrapped

Modifications

Schmidt superheaters and longer smokeboxes were fitted between 1913 and 1917.

Use

When built, the S1s hauled heavy passenger expresses between York, Newcastle, and Edinburgh. They were gradually replaced on these services by NER Class R and NER Class R1 4-4-0s. From 1907, they were mainly used for hauling fish trains.

Withdrawal

All five locomotives were withdrawn between 1929 and 1931 and none is preserved.

References
  1. "The Worsdell Class B14 (NER Class S1) 4-6-0s". LNER Encyclopedia.
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