loco-info.com - London, Midland & Scottish Fairburn 4P 2-6-4T

In his short career as Chief Mechanical Engineer at the LMS, Charles Fairburn designed only one steam locomotive. This was a direct development of Stanier's 2-6-4T, having a shorter rigid wheelbase to be able to negotiate tighter curves. This also led to a weight that was 3 tons 8 cwt lighter.

236 were built for the LMS and BR at Derby between 1945 and 1950. In 1950 and 1951, 41 more were built at Brighton for the Southern Region. They also formed the basis for the BR Standard class 4 tank. Withdrawals took place between 1961 and 1967 and two are surviving at the Lakeside and Haverthwaite Railway. As of 2024, 42073 is operational and 42085 is being overhauled.

General
Built	1945-1951
Manufacturer	Derby, Brighton
Axle config	2-6-4T (Adriatic)
Gauge	4 ft 8 1/2 in (Standard gauge)

Dimensions and Weights
Length	45 ft 9 5/8 in
Wheelbase	37 ft 1 in
Rigid wheelbase	15 ft 4 in
Service weight	190,960 lbs
Adhesive weight	118,720 lbs
Axle load	40,208 lbs
Water capacity	2,402 us gal
Fuel capacity	7,840 lbs (coal)

Boiler
Grate area	26.7 sq ft
Firebox area	143 sq ft
Tube heating area	1,223 sq ft
Evaporative heating area	1,366 sq ft
Superheater area	230 sq ft
Total heating area	1,596 sq ft

Power Plant
Driver diameter	69 in
Boiler pressure	200 psi
Expansion type	simple
Cylinders	two, 19 5/8 x 26 in

Power
Power source	steam
Estimated power	1,300 hp (969 kW)
Optimal speed	34 mph
Starting effort	24,671 lbf

Calculated Values
Factor of adhesion	1 : 4.81
Power-to-weight ratio	0.0068 hp/lb
Heating Area Equivalent	2,541 sq ft
Cylinder volume/HAE	1 : 1091.89
Adhesive weight/Total	1 : 1.61
Tractive force/Heating area	1 : 3475.08
Grate area/Heating area	1 : 54.41
Firebox/Tube area	1 : 10.16
Total/Superheater	1 : 5.94

steam locomotive

passenger

tank locomotive

Charles Edward Fairburn

last changed: 05/2024

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