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LNWR/LMS Webb "Precedent" Class 2-4-0


Class Types
LNWR Class Precedent

General
Designer Francis Webb
Introduced 1874
Pre-Grouping London and North Western Railway
Big Four London, Midland & Scottish Railway
Wheels 2-4-0
Number Built as Precedent 70
Conversions to other classes 8
Number Scrapped 70
First in Service 12/1874
Last in Service 10/1934
Manufacturers
ManufacturerTotal
Crewe Works 70
Orders
BuilderSponsorOrder #DateSize
Crewe Works  n/a 12/1874 20
Crewe Works  n/a 04/1877 20
Crewe Works  n/a 08/1878 10
Crewe Works  n/a 10/1880 10
Crewe Works  n/a 01/1882 10

Power
Variant Introduced 1887
Inside Cylinders 17" x 24" (2 off)
Inside Motion Allan

Wheels
Pony 3' 6"
Drivers 6' 6"
Locomotive Wheelbase 15' 8"
Descriptive Wheelbase 7' 5" + 8' 3" = 15' 8" (engine only)

Dimensions

Boiler & Firebox
Boiler Max Diameter 4' 2"
Boiler Barrel Length 9' 10"
Total Heating Area 1083ft2