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Lancashire & Yorkshire class 32

London, Midland & Scottish class 6F

Great Britain 1908 5 produced
Locomotive Magazine, May 1909

Since the Great Northern's L1, it had become the fashion in Britain to procure very heavy tank locomotives without a leading axle for jobs requiring high tractive effort or rapid acceleration. The poorer running smoothness at higher speeds and the shorter range compared to a tender locomotive could be ignored here. While the L1 was built for the rapid acceleration of commuter trains, the Lancashire & Yorkshire Railway's Class 32 was intended to be used for heavy shunting or hauling freight trains. The area of application was primarily in the port of Liverpool, which had short, steep gradients. George Hughes, chief engineer of the L&YR, based the development to a certain extent on the class 30 D tender locomotive of his predecessor Aspinall.

The diameter of the boiler was increased by a full foot while still sticking to the saturated steam principle. Considerations had come to the conclusion that the superheaters of the time did not work with full efficiency in shunting operations and that the additional complexity would therefore not be expedient. The wheelbase of the driving axles was increased, which required the four middle driving wheels to be designed without flanges. The cylinders were very large for a simple expansion locomotive and powered the second axle. They provided a tractive force of about 34,000 pounds. 

Five were ordered, all delivered in March and April 1908. Their use was initially planned on the shunting yards in Aintree with humps, but this was ultimately not possible. The reason for this was that some chassis parts damaged the conductor rails which were present there. Ultimately they were stationed at Accrington and Agecroft and used for heavy shunting and banking work. After the grouping of 1923, the L&YR belonged to the LMS and there there was no great need for small classes with a small number of locomotives. Therefore, they were withdrawn between 1925 and 1929 when the maintenance deadlines for the boilers expired.

The last built engine, No. 1505 PD

Technical data

General

Built
1908
Manufacturers
Horwich
Wheel arrangement
0-8-2T (River Irt)
Gauge
1,435 mm (Standard gauge)

Dimensions and weights

Wheelbase
7.47 m
Service mass
85.3 t
Adhesion mass
69.1 t
Rigid wheelbase
5.18 m
Axle load
17.8 t
Water capacity
9,093 l
Fuel capacity
3 t (coal)

Boiler

Grate area
2.378 m²
Firebox surface
17.652 m²
Tube heating surface
186.549 m²
Evaporative heating surface
204.201 m²
Total heating surface
204.2 m²

Power plant

Driver diameter
1,372 mm
Boiler pressure
12.4 bar
Expansion type
simple expansion
Cylinders
two, 546 x 660 mm

Power

Power source
steam
Estimated power
708 kW (963 PS)
Starting effort
151.5 kN

Calculated values

Factor of adhesion
1 : 4.47
Optimal speed
29 km/h
Power-to-weight ratio
8.3 kW/t
Heating Surface Equivalent
292.5 m²
Cylinder volume/HSE
1 : 1,057.80
Adhesive weight/Total
1 : 1.24
Tractive force/Heating surface
1 : 15.49
Grate area/Heating surface
1 : 85.87
Firebox/Tube surface
1 : 10.57
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