G&SWR 128 Class

The Glasgow and South Western Railway (G&SWR) 128 class is a class of two 4-6-0 steam locomotives designed by James Manson as a development of his 381 Class 4-6-0s, and were his final locomotive design before he retired. They were built in 1911 by the North British Locomotive Company at its Queens Park works and were considered both good looking and excellent performers.[1]

G&SWR 128 Class
Type and origin
Power typeSteam
DesignerJames Manson
BuilderNorth British Locomotive Co.
Build date1911
Total produced2
Specifications
Configuration:
​
 • Whyte4-6-0
 • UIC2′C
Gauge4 ft 8 1⁄2 in (1,435 mm)
Driver dia.6 ft 6 in (1,981 mm)
Wheelbase27 ft 7 in (8.41 m)
Height12 ft 11.5 in (3.950 m)
Loco weight69 long tons 2 cwt (154,800 lb or 70.2 t)
Fuel typeCoal
Boiler pressure160 psi (1,100 kPa)
CylindersTwo
Cylinder size21 in × 26 in (533 mm × 660 mm)
Valve gearStephenson
Performance figures
Tractive effort19,992 lbf (88.93 kN)
Career
OperatorsG&SWR » LMS
ClassG&SWR: 128
NumbersG&SWR: 128, 129;
(from 1919): 512, 513
LMS: 14673, 14674
Retired1933–1934
DispositionAll scrapped

Numbering

G&SWR

Originally numbered 128 and 129, they became 512 and 513 in the G&SWR renumbering of 1919.

LMS

After the 1923 grouping they became LMS numbers 14673 and 14674, but were scrapped in 1933 and 1934 under the LMS drive for standardisation.

Features

The 128 class, along with the 381 class, were the only G&SWR locomotives to use the 4-6-0 wheel arrangement, and were also the only G&SWR locos to have Belpaire fireboxes. As originally built, No.129 had a Weir feedwater heater mounted on top of the boiler between the chimney and the dome, but this was removed in 1919. The same locomotive operated for a period as a 4-4-2 after it broke a trailing rod.[1]

References
  1. Stewart, W.D. (March 1971). "Manson's 128 class 4-6-0". Railway Modeller. Vol. 22 no. 245. Beer: Peco publications & publicity Ltd. p. 91.
  • Casserley, H. C. & Johnston, Stuart W. (1974) [1966]. Locomotives at the Grouping 3: London, Midland and Scottish Railway. Shepperton, Surrey: Ian Allan. p. 149. ISBN 0-7110-0554-0.


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