SECR F1 class

The SECR F1 class was a series of 4-4-0 steam locomotives operated by the South Eastern and Chatham Railway. These locomotives were rebuilt from older Stirling F class locomotives by Harry Wainwright between 1903 and 1919.

SECR F1 class
Type and origin Power type Steam Designer Harry Wainwright Builder Ashford Works Rebuild date 1903–1919 Number rebuilt 76
Specifications Configuration: ​  • Whyte 4-4-0  • UIC 2′B Gauge 4 ft 8+1⁄2 in (1,435 mm) Driver dia. 7 ft 0 in (2.134 m) Loco weight 45.1 long tons (45.8 t) Fuel type Coal Boiler pressure 170 psi (1.17 MPa) Cylinders Two, inside Cylinder size 18 in × 26 in (457 mm × 660 mm) Valve gear Stephenson
Performance figures Tractive effort 14,491 lbf (64.5 kN)
Career Operators South Eastern and Chatham Railway → Southern Railway → Southern Region of British Railways Class SECR/SR: F1 Number in class 1 January 1923: 75 Nicknames Jumbo Withdrawn 1920–1949 Disposition All scrapped

Numbering

Seventy-six locomotives were rebuilt, and 75 survived into Southern Railway (SR) ownership as of 1 January 1923. They were assigned random numbers ranging between 2 and 250. Nine locomotives survived into British Railways (BR) ownership in 1948. Numbers of these nine were:

SECR no.	SR no.	BR no.
2	1002	31002
28	1028	31028
31	1031	31031
42	1042	31042
78	1078	31078
105	1105	31105
151	1151	31151
215	1215	31215
231	1231	31231

Accidents and incidents

• In August 1926, a F1 class locomotive overran buffers at London Bridge and crashed into a brewery.
• On 19 August 1928 A148 was deliberately crashed into a lorry at Lasham, between Basingstoke and Alton, for the film 'the Wrecker'. The remains were cut up on site.