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LMS Fairburn "4P" Class 2-6-4T

**Class Types**
LMS Class	4P
BR Class	4MT

General

Designer

Charles Fairburn

Introduced

1945

Grouping Company

London, Midland & Scottish Railway

Wheel Arrangement

2-6-4T

Number Built as 4P

277

Number Scrapped

275

Number Preserved

First in Service

28/03/1945

Last in Service

10/1967

Manufacturers

Manufacturer	Total
Brighton Works	41
Derby Works	236

Historical Data

Fairburn developed Stanier's 2 cylinder 2-6-4T design by reducing the coupled wheelbase, thereby enabling the engines to negotiate curves of radius 5 chains instead of the 6 chains of the original. Furthermore, the weight was reduced by 2t 12cwt. Altogether, these changes allowed the Fairburn design to have an increased sphere of activity.
Other principle changes involved the footplating which was shallower and cut away at the front to ease access to the cylinders and pistons.

**Illustration**

Copyright: Peter Brumby c/o 53A Models

**Power**
Variant Introduced	1945

Complete BR Locomotive Database 1948-1997

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LMS Fairburn "4P" Class 2-6-4T