| LNWR Class F | |
| Powertype: | Steam |
| Designer: | George Whale |
| Rebuilder: | Crewe Works |
| Rebuilddate: | 1906–08 |
| Numberrebuilt: | 10 from Class B 2 from Class E |
| Whytetype: | 2-8-0 |
| Uicclass: | 1′D n4vg |
| Driverdiameter: | 4feet |
| Fueltype: | Coal |
| Boiler: | 5feet x 14feet |
| Boilerpressure: | 175psi |
| Totalsurface: | 2180square feet |
| Cylindercount: | Four, two outside high-pressure, two inside low-pressure |
| Hpcylindersize: | 15x |
| Lpcylindersize: | NaNx |
| Valvegear: | Joy |
| Operator: | London and North Western Railway, London, Midland and Scottish Railway |
| Operatorclass: | F |
| Powerclass: | LMS: 3F |
| Numinclass: | 12 |
| Withdrawndate: | 1921–28 |
| Disposition: | 10 rebuilt to class G1 1921–25; 2 scrapped 1927–28 |
The London and North Western Railway (LNWR) Class F was a class of 2-8-0 steam locomotives in service between 1906 and 1928.
George Whale had rebuilt 26 of the Class B compound 0-8-0s with the addition of a leading pony truck between 1904–1908 to what would become Class E in 1911. However, from 1906 10 Class Bs were rebuilt with larger diameter boilers, along with a pair of Class Es (Nos. 1038 and 647) in 1907 and 1908 respectively.
From 1921, the LNWR started rebuilding the Class Fs into Class G1 superheated 0-8-0s, and by the grouping of 1923 six had been rebuilt. The remaining six were allocated the LMS numbers 9610–5. The LMS rebuilt a further four into G1s between 1923 and 1925. The last two were withdrawn and scrapped in 1927 and 1928 without being rebuilt.
| LNWR no. | Origin | LMS no. | Fate | Notes | |
|---|---|---|---|---|---|
| 899 | Rebuilt from B 1907 | (9610) | Rebuilt to G1 1923 | ||
| 352 | Rebuilt from B 1907 | (9611) | Withdrawn 1927 | ||
| 2114 | Rebuilt from B 1908 | Rebuilt to G1 1922 | |||
| 906 | Rebuilt from B 1907 | (9612) | Rebuilt to G1 1923 | ||
| 1036 | Rebuilt from B 1907 | Rebuilt to G1 1921 | |||
| 1038 | Rebuilt from E 1907 | Rebuilt to G1 1921 | |||
| 2570 | Rebuilt from B 1906 | Rebuilt to G1 1921 | |||
| 1247 | Rebuilt from B 1906 | (9613) | Rebuilt to G1 1923 | ||
| 1273 | Rebuilt from B 1906 | 9614 | Withdrawn 1928 | ||
| 2573 | Rebuilt from B 1908 | Rebuilt to G1 1922 | |||
| 647 | Rebuilt from E 1908 | (9615) | Rebuilt to G1 1925 | ||
| 1369 | Rebuilt from B 1907 | Rebuilt to G1 1922 |