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Railway → Southern Region of British Railways Class SECR/SR: F1 Number in class 1 January 1923: 75 Nicknames Jumbo Withdrawn 1920–1949 Disposition All scrapped

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Withdrawn	1920–1949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 class of 4-4-0 steam locomotives of the South Eastern and Chatham Railway. The class was rebuilt from older Stirling F class locomotives by Harry Wainwright between 1903 and 1919.

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

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