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 type Steam Designer James Manson Builder North British Locomotive Co. Build date 1911 Total produced 2
Specifications Configuration: ​  • Whyte 4-6-0  • UIC 2′C Gauge 4 ft 8 ^1⁄2 in (1,435 mm) Driver dia. 6 ft 6 in (1,981 mm) Wheelbase 27 ft 7 in (8.41 m) Height 12 ft 11.5 in (3.950 m) Loco weight 69 long tons 2 cwt (154,800 lb or 70.2 t) Fuel type Coal Boiler pressure 160 psi (1,100 kPa) Cylinders Two Cylinder size 21 in × 26 in (533 mm × 660 mm) Valve gear Stephenson
Performance figures Tractive effort 19,992 lbf (88.93 kN)
Career Operators G&SWR » LMS Class G&SWR: 128 Numbers G&SWR: 128, 129; (from 1919): 512, 513 LMS: 14673, 14674 Retired 1933–1934 Disposition All 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.