LMS Fairburn 2-6-4T
42140 at Derby
Type and origin Power type Steam Designer Charles E. Fairburn Builder LMS & BRDerby Works BRBrighton Works Build date 1945–1951 Total produced 277
Specifications Configuration: ​  • Whyte 2-6-4T  • UIC 1′C2′ h2t Gauge 4 ft 8+1⁄2 in (1,435 mm)standard gauge Leading dia. 3 ft3+1⁄2 in (1.003 m) Driver dia. 5 ft 9 in (1.753 m) Trailing dia. 3 ft3+1⁄2 in (1.003 m) Wheelbase 37 ft 1 in (11.30 m) Length 45 ft9+3⁄4 in (13.96 m) Loco weight 42050–42146: 84.70 long tons (86.06 t; 94.86 short tons) remainder: 85.25 long tons (86.62 t; 95.48 short tons) Fuel type Coal Fuel capacity 3.5 long tons (3.6 t; 3.9 short tons) Water cap. 42050–42146: 1,875 imp gal (8,520 L) remainder: 2,000 imp gal (9,100 L) Firebox: ​  • Grate area 26+3⁄4 sq ft (2.49 m2) Boiler LMS type 4C Boiler pressure 200 lbf/in2 (1.38 MPa) Heating surface: ​  • Firebox 143 sq ft (13.3 m2)  • Tubes and flues 1,223 sq ft (113.6 m2) Superheater: ​  • Heating area 230 sq ft (21 m2) Cylinders Two, outside Cylinder size 19+5⁄8 in × 26 in (498 mm × 660 mm) Valve gear Walschaerts
Performance figures Tractive effort 24,670 lbf (109.74 kN)
Career Operators London, Midland and Scottish Railway British Railways Power class LMS: 4P BR: 4MT Withdrawn 1961–1967 Disposition Two preserved, remainder scrapped

TheLondon, Midland and Scottish Railway (LMS)Fairburn Tank2-6-4T is a class ofsteam locomotive. They were designed byCharles E. Fairburn for the LMS. 277 of these locomotives were built between 1945 and 1951, numbered in the range 42050–42186, (4)2187–(4)2299, (4)2673–(4)2699.

This design was based on the earlierStanierLMS Stanier 2-6-4T, which was derived fromHenry Fowler'sLMS Fowler 2-6-4T engine. Fairburn modified the design to have a shorter coupled wheelbase, reduced from 16 ft 6 in (5.03 m) to 15 ft 4 in (4.67 m) allowing curves of 5 chains to be negotiated; to reduce the locomotives mass per unit length the overall weight was reduced by 3 long tons 8 cwt (7,600 lb or 3.5 t).^[1]

It was also the basis for the laterBritish RailwaysStandard Class 4 tank. They were used mainly for suburban passenger trains. Forty-one examples of the class were constructed byBrighton railway works for service on theSouthern Region of British Railways in 1950 and 1951, replacing earlier designs. Of these, seven were transferred to theNorth Eastern Region between Spring 1952 and the end of 1954;^[2] the other 34 were exchanged for a like number ofLondon Midland Region BR Standard Class 4 2-6-4T locomotives at the end of 1959.^[3]

• On 19 April 1955, locomotive No. 42073^{[dubious –discuss]} was in collision withV2 No. 60968 atNewcastle Central station,Northumberland. Both locomotives were derailed.^[4]

The class was withdrawn between 1961 and 1967.

Two of the Brighton-built locomotives have survived in preservation.

Number	Builder	Built	Withdrawn	Service Life	Location	Owners	Livery	Condition	Photograph	Notes
42073	Brighton Works	Nov 1950	Oct 1967	16 Years, 10 months	Lakeside and Haverthwaite Railway	-	BR Lined Black, Late Crest	Operational, boiler ticket expires: 2024
42085	Brighton Works	Sept 1951	Oct 1967	16 Years, 7 months	Lakeside and Haverthwaite Railway	-	BR Lined Black, Early Emblem (on completion)	Undergoing overhaul

In its early days, 2085 carriedCaledonian Railway blue livery, complete with an oval brass Caledonian number plate. This attractive livery was popular with the public, but strongly divided opinions in the preservation movement for its inaccuracy. At the same time, 2073 was painted in LNWR blackberry black, which was comparably anachronistic but generated less hostility as it did at least resemble the original livery.

Bachmann produces a 00 Gauge model of the Fairburn 4MT in LMS Black as well as early and late BR, numbered as 42073.Bachmann (Graham Farish) also produces several N gauge variants: 2691 in LMS black, 42096 (early BR black), and 42073 (late BR black).

ACE Trains have produced an O-gauge model of 2085 in its early-preservation Caledonian Railway blue livery, although the model is actually of a Stanier designed 2-6-4T.

• Becket, W. S. (1988).The Xpress Locomotive Register. Caernarvon: Xpress Publishing.ISBN 1-901056-023.
• 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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