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Specifications
Specifications
Configuration:;
• Whyte	2-8-0
• UIC	1′D n4vg
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

Type and origin
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

LNWR Class F
LNWR Class F
	No. 1273 in photographic grey livery without tender
Power type
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
Configuration:;
Specifications
Configuration:;
• Whyte	2-8-0
• UIC	1′D n4vg
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
Operators
Career
Operators	London and North Western Railway, London, Midland and Scottish 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Withdrawn	1921–28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.

History

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 5 ft 2 in (157 cm) 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 The last two were withdrawn and scrapped in 1927 and 1928 without being rebuilt.

List of locomotives

LNWR no.	Origin	LMS no.	Fate	Notes
899	Rebuilt from B 1907	(9610)	Rebuilt to G1 1923	^[1]
352	Rebuilt from B 1907	(9611)	Withdrawn 1927	^[1]
2114	Rebuilt from B 1908		Rebuilt to G1 1922	^[1]
906	Rebuilt from B 1907	(9612)	Rebuilt to G1 1923	^[2]
1036	Rebuilt from B 1907		Rebuilt to G1 1921	^[2]
1038	Rebuilt from E 1907		Rebuilt to G1 1921	^[2]
2570	Rebuilt from B 1906		Rebuilt to G1 1921	^[2]
1247	Rebuilt from B 1906	(9613)	Rebuilt to G1 1923	^[3]
1273	Rebuilt from B 1906	9614	Withdrawn 1928	^[4]
2573	Rebuilt from B 1908		Rebuilt to G1 1922	^[4]
647	Rebuilt from E 1908	(9615)	Rebuilt to G1 1925	^[5]
1369	Rebuilt from B 1907		Rebuilt to G1 1922	^[6]

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

Notes

^ ^a ^b ^c Baxter 1979, p. 255.
^ ^a ^b ^c ^d Baxter 1979, p. 256.
^ Baxter 1979, p. 257.
^ ^a ^b Baxter 1979, p. 258.
^ Baxter 1979, p. 259.
^ Baxter 1979, p. 260.

References

Baxter, Bertram (1979). Baxter, David (ed.). British Locomotive Catalogue 1825-1923, volume 2B: London and North Western Railway and its constituent companies. Ashbourne: Moorland Publishing. ISBN 0-903485-84-2.