GWR 850 Class

GWR 850 Class
No. 2007 (withdrawn 12/49) awaiting scrapping at Swindon 1950
Type and origin Power type Steam Designer George Armstrong Builder GWR Wolverhampton works Build date 1874-1895 Total produced 170
Specifications Configuration: ​  • Whyte 0-6-0ST Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Driver dia. 4 ft 0 in (1.219 m) Wheelbase 13 ft 8 in (4.17 m) Fuel type Coal Boiler GWR 850[1] Cylinders two Cylinder size 15 in × 24 in (381 mm × 610 mm)
Career Operators Great Western Railway British Railways Retired 1927–1958 Disposition All scrapped

The GWR Class 850 was an extensive class of small 0-6-0ST locomotives designed by George Armstrong and built at the Wolverhampton railway works of the Great Western Railway between 1874 and 1895. Aptly described as the GWR equivalent of the LB&SCR "Terrier" Class of William Stroudley, their wide availability and lively performance gave them long lives, and eventually they were replaced from 1949 by what were in essence very similar locomotives, the short-lived 1600 Class of Frederick Hawksworth, which in the headlong abandonment of steam outlived them by a mere seven years or so.