GWR Thunderer locomotive

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GWR Thunderer
Power type Steam
Designer T. E. Harrison
Builder R. & W. Hawthorn & Co.
Serial number 235
Build date 1838
Total produced 1
Configuration 0-4-0+6
Gauge 7 ft (2,134 mm)
Driver diameter 6 ft 0 in (1,829 mm)
Wheelbase 7 ft 0 in (2.13 m)
Cylinder size 16 in × 20 in (406 mm × 508 mm)
Railroad(s) Great Western Railway
Number in class 1
Withdrawn 1839
Disposition Scrapped

Thunderer was the first of a pair of locomotives (the other being Hurricane) built for the Great Western Railway (GWR), England, by R. & W. Hawthorn & Co. whose design was very different from other steam locomotives. In order to meet Isambard Kingdom Brunel's strict specifications, an 0-4-0 frame carried the 'engine', while the boiler was on a separate six-wheeled frame. The driving wheels were geared 10:27 in order to reduce the cylinder stroke speed while allowing high track speed, in line with the specifications.

The locomotive was delivered to the GWR on 6 March 1838 and ceased work in December 1839[1] after running only 9,882 miles, but its boiler section was kept as a stationary boiler.

See also[edit]


  1. ^ Reed 1953, p. B11


  • Reed, P.J.T. (February 1953). White, D.E., ed. The Locomotives of the Great Western Railway, Part 2: Broad Gauge. Kenilworth: The Railway Correspondence and Travel Society. ISBN 0-901115-32-0. 
  • Waters, Laurence (1999). The Great Western Broad Gauge. Hersham: Ian Allan Publishing. ISBN 0-7110-2634-3.