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LNWR Webb "Precursor" Class 2-4-0


Class Types
LNWR Class Precursor

General
Designer Francis Webb
Introduced 1874
Pre-Grouping Company London and North Western Railway
Wheel Arrangement 2-4-0
Number Built as Precursor 40
Number Scrapped 40
First in Service 04/1874
Last in Service 11/1895
Manufacturers
ManufacturerTotal
Crewe Works 40
Orders
BuilderSponsorOrder #DateSize
Crewe Works  n/a 04/1874 20
Crewe Works  n/a 09/1878 10
Crewe Works  n/a 01/1879 10
Historical Data Webb's first design for the LNWR. Fitted with Allan motion, cabs (!) and closed splashers.

Power
Variant Introduced 1874
Inside Cylinders 17" x 24" (2 off)
Inside Motion Allan

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

Dimensions

Boiler & Firebox
Boiler Diagram Precursor
Boiler Notes As fitted to Webb 2-4-0 Precursor class
Boiler Max Diameter 4' 2"
Boiler Barrel Length 9' 10"
Boiler Pressure 120lbs
Total Heating Area 1074.6ft2