| SECR F1 class | |
| Powertype: | Steam |
| Designer: | Harry Wainwright |
| Builder: | Ashford Works |
| Rebuilddate: | 1903–1919 |
| Numberrebuilt: | 76 |
| Whytetype: | 4-4-0 |
| Uicclass: | 2′B |
| Driverdiameter: | 7feet |
| Locoweight: | 45.1LT |
| Fueltype: | Coal |
| Boilerpressure: | 1702NaN2 |
| Cylindercount: | Two, inside |
| Cylindersize: | 18x |
| Valvegear: | Stephenson |
| Tractiveeffort: | 144911NaN1 |
| Operatorclass: | SECR/SR: F1 |
| Numinclass: | 1 January 1923: 75 |
| Nicknames: | Jumbo |
| Withdrawndate: | 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]
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.[2] 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 |