L&YR Hughes 4-6-4T

The Lancashire and Yorkshire Railway Hughes 4-6-4T was a class of steam locomotives. They were a 4-6-4T tank engine version of the L&YR Class 8 ("Dreadnought" Class 4-6-0), hence they were known as "Dreadnought tanks".

Lancashire & Yorkshire Railway Hughes 4-6-4T
Type and origin
Power typeSteam
DesignerGeorge Hughes
BuilderLMS Horwich Works
Order number
  • Horwich Lot 82
  • LMS Lot No. 2
Serial numberHorwich 1354–1363
Build dateMarch – August 1924
Total produced10
Specifications
Configuration:
​
 • Whyte4-6-4T
 • UIC2′C2′ h4t
Gauge4 ft 8 1⁄2 in (1,435 mm)
Leading dia.3 ft 0 3⁄8 in (0.924 m)
Driver dia.6 ft 3 in (1.905 m)
Trailing dia.3 ft 0 3⁄8 in (0.924 m)
Length49 ft 10 1⁄2 in (15.20 m)
Loco weight99.95 long tons (101.55 t)
Fuel typeCoal
Fuel capacity3.50 long tons (3.56 t)
Water cap2,000 imp gal (9,100 l; 2,400 US gal)
Firebox:
 • Firegrate area		29.5 sq ft (2.74 m2)
BoilerLMS type ‘RS’
Boiler pressure180 lbf/in2 (1.24 MPa)
Heating surface:
 • Tubes and flues		1,817 sq ft (168.8 m2)
Superheater:
​
 • Heating area395–430 sq ft (36.7–39.9 m2)
CylindersFour
Cylinder size16 1⁄2 in × 26 in (419 mm × 660 mm)
Valve gearWalschaerts
Valve typePiston valves
Train brakesVacuum
Performance figures
Tractive effort28,880 lbf (128.5 kN)
Career
OperatorsLondon, Midland and Scottish Railway
Power class5P
Numbers11110–11119
NicknamesDreadnought tank
WithdrawnMarch 1938 – January 1942
DispositionAll scrapped

Construction

All were actually built by the London, Midland and Scottish Railway in 1924 after the grouping, albeit at the Lancashire and Yorkshire Railway's Horwich Works.

Numbering

They had been allocated L&Y numbers 1684–1693, but these were never carried and there was no L&YR class number. The LMS gave them the numbers 11110–11119, and the power classification 5P.

Orders modified or cancelled

Another 20 of this class were ordered but turned out as further examples of the L&YR Class 8. Orders for an additional 30 were cancelled. Like the Class 8 on which they were based, they were not particularly successful.

Withdrawal

Withdrawals started in 1938, with three engines (11112, 11115, 11116), one each in 1939 and 1940 (11113 and 11111 respectively), four in 1941 (11114, 11117–11119) and the last (11110) in January 1942. None was preserved.

gollark: Clearly we should have used glorious functionally pure haskell for this.
gollark: Why?
gollark: With some combinator hax, sure.
gollark: > assuming we can't mind-control it
gollark: The issue is that - assuming we can't mind-control it - the grudger will remember that I was mean to it.

References
  • Baxter, Bertram (1982). Baxter, David (ed.). British Locomotive Catalogue 1825–1923, Volume 3B: Lancashire and Yorkshire Railway and its constituent companies. Ashbourne, Derbyshire: Moorland Publishing Company. p. 94. ISBN 0-903485-85-0.
  • Casserley, H. C. & Johnston, Stuart W. (1974) [1966]. Locomotives at the Grouping 3: London, Midland and Scottish Railway. Shepperton, Surrey: Ian Allan. ISBN 0-7110-0554-0.
  • Rowledge, J.W.P. (1975). Engines of the LMS built 1923–51. Oxford: Oxford Publishing Company. ISBN 0-902888-59-5.
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