LNWR Class G1

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.[1] 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.

LNWR Class G1
No. 1384 in photographic grey livery
Type and origin
Power typeSteam
DesignerCharles Bowen Cooke
BuilderCrewe Works
Build date1901-1904
Total producedNew builds: 171
Rebuilds: 278
Total: 449
RebuilderCrewe Works
Specifications
Configuration:
​
 • Whyte0-8-0
 • UICD h2
Gauge4 ft 8+1⁄2 in (1,435 mm)
Driver dia.4 ft 5+1⁄2 in (1.359 m)
Loco weight60 long tons 15 cwt (136,100 lb or 61.7 t)
Fuel typecoal
Boiler pressure160 psi (1.10 MPa)
Cylinders2 inside
Cylinder size20½" x 24"
Performance figures
Tractive effort25,640 lbf (114.1 kN)
Career
OperatorsLNWR » LMS » BR
Power classBR, 6F

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.[2]

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Ex-LMS No. 9171 - still unrenumbered in 1951, built as a G1 in May 1912 and withdrawn not long after this photograph in February 1952
SourceDates (re)builtTotal (re)built(Re)built by LNWRLNWR No(s)Rebuilt by LMSLMS No(s)Notes
Prototype Class G191211265309154
New construction1912–1918170170...09155-9334
Class B1917–19279146 ?45 ?
Class E1917–19241812...6...
Class F1921–19241061036, 1038, 2570, 2114, 2573, 13694initially: 9349/65/7/72/3/86.
Class D1925–1934630n/a639002-64
Class C1925–192750n/a58953/4/62/4/6
Class G ?910n/a919077-9144
Total:1912-1934449235see above214see 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.[3]

References
  1. LNWR Society. "Goods Engines of LNWR - 'G1' Class". Lnwrs.org.uk. Retrieved 9 April 2012.
  2. Ian Allan ABC of British Railways Locomotives, 1948 edition, part 3, pp 39-40
  3. "'G1' Class". London and North Western Railway Society. Retrieved 25 February 2020.

Further reading
Wikimedia Commons has media related to LNWR G1 Class.
  • 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
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