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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

Number Scrapped

First in Service

04/1874

Last in Service

11/1895

Manufacturers

Manufacturer	Total
Crewe Works	40

Orders

Builder	Sponsor	Order #	Date	Size
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)

**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

Complete BR Locomotive Database 1948-1997

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LNWR Webb "Precursor" Class 2-4-0