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LNWR/LMS Webb "4ft 6 Tank" Class 2-4-2T


Class Types
LNWR Class 4ft 6 Tanks

General
Designer Francis Webb
Introduced 1879
Pre-Grouping London and North Western Railway
Big Four London, Midland & Scottish Railway
Wheels 2-4-2T
Number Built as 4ft 6 Tank 220
Conversions to other classes 5
First in Service 01/1879
Last in Service 1933
Manufacturers
ManufacturerTotal
Crewe Works 220
Orders
BuilderSponsorOrder #DateSize
Crewe Works  n/a 01/1879 1
Crewe Works  n/a 03/1880 9
Crewe Works  n/a 1881 10
Crewe Works  n/a 1882 20
Crewe Works  n/a 1883 20
Crewe Works  n/a 05/1883 20
Crewe Works  n/a 1884 20
Crewe Works  n/a 11/1884 20
Crewe Works  n/a 1885 40
Crewe Works  n/a 03/1889 10
Crewe Works  n/a 01/1890 20
Crewe Works  n/a 1897 20
Crewe Works  n/a 1898 10
Historical Data Renewals of 2-4-0T. As with all renewals, barely any, if at all, material was used and these engines are effectively new.
Extended version of the 2-4-0T. Originally built for local traffic but then found to be ideal for motor work - almost all were converted as such later on (although 20 were fitted from new). Vacuum brakes fitted from 1912.
Five were rebuilt as 2-4-0Ts.

Power
Variant Introduced 1879
Inside Cylinders 17" x 20" (2 off)

Wheels
Pony 3' 3"
Drivers 4' 6"
Truck 3' 3"
Locomotive Wheelbase 22' 3"
Descriptive Wheelbase 6' 9" + 7' 9" + 6' 9" = 22' 3"

Dimensions
Weight (loco only) 46t 0cwt

Boiler & Firebox
Boiler Diagram ??
Boiler Max Diameter 4'
Boiler Barrel Length 9' 10"
Total Heating Area 971.6ft2