SECR F1 class

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Railway → Southern Region of British Railways Class SECR/SR: F1 Number in class 1 January 1923: 75 Nicknames Jumbo Withdrawn 1920–1949 Disposition All scrapped

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.^[1]