NER Class S2

The North Eastern Railway Class S2 - London and North Eastern Railway Class B15 - was a mixed-traffic 4-6-0 steam locomotive designed by Vincent Raven. The design was based on NER Class S.

NER Class S2
LNER Class B15
Type and origin
Power typeSteam
DesignerVincent Raven
Build date1911-1913
Total produced20
Specifications
Configuration:
​
 • Whyte4-6-0
Leading dia.3 ft 7+1⁄4 in (1.099 m)
Driver dia.6 ft 1+1⁄4 in (1.861 m)
Wheelbase26 ft 0+1⁄2 in (7.938 m) engine
12 ft 8 in (3.86 m) tender
50 ft 8+1⁄4 in (15.450 m) total
Axle load19.4 long tons (19.7 t)
Loco weight71.1 long tons (72.2 t)
Tender weight44 long tons (45 t)
Total weight115.1 long tons (116.9 t)
Firebox:
 • Firegrate area		23 sq ft (2.1 m2)
Boiler5 ft 6 in (1.68 m)
Boiler pressure175 psi (1.21 MPa)
Heating surface1,730 sq ft (161 m2)
 • Tubes723 sq ft (67.2 m2)
 • Flues506 sq ft (47.0 m2)
 • Firebox140 sq ft (13 m2)
Superheater:
​
 • Heating area361 sq ft (33.5 m2)
Cylinders2, outside
Cylinder size20 in × 26 in (510 mm × 660 mm)
Valve gearStephenson
Performance figures
Tractive effort21,115 lbf (93.92 kN)
Career
OperatorsNorth Eastern Railway, London and North Eastern Railway
NumbersNER: 782, 786-788, 791, 795-799, 813, 815, 817, 819-825
LNER (1946): 1691-1698
Withdrawn1937-1947
DispositionAll scrapped

Superheaters

The first seven was built with saturated (non-superheated) boilers, however the remaining thirteen were fitted with Robinson 24-element superheaters. The saturated B15s were eventually fitted with superheaters. Some of these rebuilds used Schmidt superheaters, however they were eventually converted to use Robinson superheaters, as Robinson superheaters were the LNER’s standard type of superheaters.

No.825

The last of the class, No.825 was fitted with Stumpf Uniflow cylinders. The inlet and exhaust ports were separate. Although the exhaust port was always the same size, the inlet port could vary in size according to the position of the cutoff. In 1918, the system was used on C7 No.2212, with a tidier result. Due to the special attention required for these experimental locomotives, in March 1924, the locomotive was rebuilt as a standard B15, matching the other members.

Performance

Although they were used on their suitable work, they steamed poorly if handled with crew who wasn’t used to the B15s (which also affected the B13s), and thus they were unpopular with crew who didn’t have enough experience on the B15s.

Accidents and incidents
  • On 14 February 1920, locomotive No. 787 was hauling a freight train which was involved in a head-on collision with a freight train hauled by locomotive No. 788 at Skelton, Yorkshire.[1]

Withdrawal

Withdrawal commenced with No.788 in September 1937, and all were gone by December 1947, with the last being No.1696 (NER No.820). None were preserved.[2]

References
  1. Hoole, Ken (1982). Trains in Trouble: Vol. 3. Redruth: Atlantic Books. p. 24. ISBN 0-906899-05-2.
  2. "NER/LNER Raven "B16" Class 4-6-0". BRDatabase.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.