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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 2
First in Service 28/03/1945
Last in Service 10/1967
Manufacturers
ManufacturerTotal
Derby Works 236
Brighton Works 41
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

Wheels

Dimensions

Boiler & Firebox