LNWR Class F

LNWR Class F
No. 1273 in photographic grey livery without tender
Type and origin Power type Steam Designer George Whale Rebuilder Crewe Works Rebuild date 1906–08 Number rebuilt 10 from Class B 2 from Class E
Specifications Configuration: ​  • Whyte 2-8-0 Gauge 4 ft 8 1⁄2 in (1,435 mm) Driver dia. 4 ft 8 in (1,420 mm) Fuel type Coal Boiler 5 ft 2 in (1,575 mm) x 14 ft 6 in (4,420 mm) Boiler pressure 175 psi (1.21 MPa) Heating surface 2,180 sq ft (203 m2) Cylinders Four, two outside high-pressure, two inside low-pressure High-pressure cylinder 15 in × 24 in (381 mm × 610 mm) Low-pressure cylinder 20 1⁄2 in × 24 in (521 mm × 610 mm) Valve gear Joy
Career Operators London and North Western Railway Class F Power class LMS: 3F Number in class 12 Withdrawn 1921–28 Disposition 10 rebuilt to class G1 1921–25; 2 scrapped 1927–28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 simple addition of a leading pony truck between 1904-1908 to what would from 1911 become Class E. However, from 1906 rebuilds of Class Bs were given a larger 5'2" diameter boilers, and ten were so rebuilt. To these was added a pair of rebuilds of Class Es (Nos 1038 in 1907 and 647 in 1908).

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 to G1s, between 1923-5. The remaining pair were withdrawn in 1927 and 1928 without being rebuilt. None was preserved.

LMS numbers in parentheses were not carried prior to rebuilding as G1 or withdrawal.