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London, Midland & Scottish Stanier class 8F

Italian State Railway class 737 and Turkish State Railway 45151 to 45170

Great Britain 1935 852 produced
No. 8510, built in 1943 at Doncaster flickr/Historical Railway Images

Since the LMS needed powerful goods locomotives to reduce the need for double-heading, Stanier designed the 8F as a 2-8-0 goods variant of his 4-6-0 “Black Five”. So apart from the changed wheel arrangement with smaller drivers, they had a similar tapered boiler with a Belpaire firebox and a small dome. They were not only built for the LMS, but were also selected as the British standard locomotive in World War II and also were used in Italy and the Middle East.

The LMS itself received 331 locomotives directly, with many built in their own works at Crewe and Horwich. The LNER bought 68 more, 208 were built for the War Department and 245 were built for the Railway Executive Committee for use with other operators. So in total, 852 locomotives were built by the works of all “Big Four” railways and commercial manufacturers.

In the War, they did not come into service in France since this country had already been invaded by Germany when they were ready. In 1944, the Middle East Forces sent 15 to Italy. After the war they were bought by the Italian State Railways. Designated class 737, they only operated until the early fifties.

Greater numbers were used in Egypt, Iran, Iraq, Palestine and Turkey. There they were not always without problems since they had been designed for use in Britain, but all in all they delivered good performances. While Egypt and Iran withdrew them in the sixties, Iraq used them until the seventies and also the locomotives from Palestine were used by Israel Railways until 1973. Turkey numbered its 20 locomotives starting with 45151 and even used them until the eighties.

British Railways inherited a total of 666 locomotives of this class. They were also used for passenger trains up to 60 mph (97 km/h) and some also received specially balanced wheelsets and motion for fast, fitted goods trains. In 1964, 664 were still in service and the last 150 survived until 1968, the last year of British steam traction. From 14 locomotives surviving in different countries, eight are situated in the UK. Two of these had returned from Turkey and are right hand drive.

No. 8233, here in passenger service, was used in Iran during World War II and returned to England in 1952 flickr/Historical Railway Images

Technical data

General

Built
1935-1946
Manufacturers
Crewe, Horwich, North British, Darlington, Doncaster, Swindon, Vulcan Foundry, Brighton, Eastleigh, Ashford, Beyer, Peacock & Co.
Wheel arrangement
2-8-0 (Consolidation)
Gauge
1,435 mm (Standard gauge)

Dimensions and weights

Length
19.22 m
Wheelbase
8.10 m
Total wheelbase
16.05 m
Service mass
73.3 t
Adhesion mass
63 t
Rigid wheelbase
5.26 m
Axle load
16.3 t
Water capacity
18,185 l
Fuel capacity
9.1 t (coal)

Boiler

Grate area
2.662 m²
Firebox surface
15.886 m²
Tube heating surface
137.404 m²
Evaporative heating surface
153.29 m²
Superheater surface
19.974 m²
Total heating surface
173.3 m²

Power plant

Driver diameter
1,435 mm
Boiler pressure
15.5 bar
Expansion type
simple expansion
Cylinders
two, 470 x 711 mm

Power

Power source
steam
Estimated power
1,342 kW
Starting effort
144.3 kN

Calculated values

Factor of adhesion
1 : 4.28
Optimal speed
56 km/h
Power-to-weight ratio
18.3 kW/t
Heating Surface Equivalent
272.7 m²
Cylinder volume/HSE
1 : 904.67
Adhesive weight/Total
1 : 1.16
Tractive force/Heating surface
1 : 17.39
Grate area/Heating surface
1 : 65.09
Firebox/Tube surface
1 : 8.65
Total/Superheater
1 : 7.67

Topics

  • steam locomotive
  • freight
  • Willian Arthur Stanier
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Last changed: 05/2025

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