LNWR Class G1

LNWR Class G1
No. 1384 in photographic grey livery
Type and origin Power type Steam Designer Charles Bowen Cooke Builder Crewe Works Build date 1901-1904 Total produced New builds, 171 Rebuilds, 278 Total, 449 Rebuilder Crewe Works
Specifications Configuration: ​  • Whyte 0-8-0  • UIC D h2 Gauge 4 ft 8+1⁄2 in (1,435 mm) Driver dia. 4 ft 5+1⁄2 in (1.359 m) Loco weight 60 long tons 15 cwt (136,100 lb or 61.7 t) Fuel type coal Boiler pressure 160 psi (1.10 MPa) Cylinders 2 inside Cylinder size 20½" x 24"
Performance figures Tractive effort 25,640 lbf (114.1 kN)
Career Operators LNWR » LMS » BR Power class BR, 6F

The London and North Western Railway (LNWR) Class G1 was a class of 0-8-0 steam locomotives. It was a superheated version of the LNWR Class G with 8 inch piston valves. The prototype was rebuilt in 1912 from a member of Class G and a further 170 new locomotives were built between 1912 and 1918. In addition, 278 older locomotives were rebuilt to the G1 specification between 1917 and 1934.

Numbering

Numbering is somewhat complicated. The LNWR used a numbering system based on the lowest available number, with the result that the numbers were scattered through the stock book. The London, Midland and Scottish Railway (LMS) renumbered the engines into a more logical series. However, they also then continued to rebuild engines, which retained the numbers originally assigned by the LMS. British Railways (BR) inherited 98 locomotives in 1948 and numbered them in the range 48892-49384. The number series is not continuous because some numbers in the same range were given to G2A Class locomotives.

Construction and rebuilding list

Ex-LMS No. 9171 - still unrenumbered in 1951, built as a G1 in May 1912 and withdrawn not long after this photograph in February 1952

Source	Dates (re)built	Total (re)built	(Re)built by LNWR	LNWR No(s)	Rebuilt by LMS	LMS No(s)	Notes
Prototype Class G	1912	1	1	2653	0	9154
New construction	1912–1918	170	170	...	0	9155-9334
Class B	1917–1927	91	46	?	45	?
Class E	1917–1924	18	12	...	6	...
Class F	1921–1924	10	6	1036, 1038, 2570, 2114, 2573, 1369	4	initially: 9349/65/7/72/3/86.
Class D	1925–1934	63	0	n/a	63	9002-64
Class C	1925–1927	5	0	n/a	5	8953/4/62/4/6
Class G	?	91	0	n/a	91	9077-9144
Total:	1912-1934	449	235	see above	214	see above

Some were rebuilt back from Class G2a to Class G1 as they passed through heavy overhaul and received lower pressure boilers. Some were even purchased by the Railway Operating Division.

Further reading

• Bob Essery & David Jenkinson An Illustrated Review of LMS Locomotives Vol. 2 Absorbed Pre-Group Classes Western and Central Divisions
• Edward Talbot, The London & North Western Railway Eight-Coupled Goods Engines
• Willie Yeadon, Yeadon's Compendium of LNWR Locomotives Vol 2 Goods Tender Engines