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


Class Types
LMS Class 4P-C

General
Designer Fairburn
Introduced 1945
Big Four London, Midland & Scottish Railway
Wheels 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
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

Wheels

Dimensions

Boiler & Firebox