LNWR Webb Precursor Class explained

LNWR Precursor class (Webb)
Powertype:Steam
Designer:F. W. Webb
Builder:Crewe Works
Serialnumber:1902–1821, 2229–2238, 2249–2258
Builddate:1874–1879
Totalproduction:40
Uicclass:1B n2
Leadingdiameter:3feet
Driverdiameter:5feet
Diameterinside:4feet
Lengthinside:9feet
Boilerpressure:1402NaN2
Totalsurface:1074.6square feet
Cylindersize:17x
Valvegear:Allan
Operator:London and North Western Railway
Scrapdate:1892–1895
Disposition:All scrapped

The London and North Western Railway (LNWR) Precursor class was a class of forty steam locomotives designed by F. W. Webb and built at the railway's Crewe Works between 1874 and 1879.

History

The Precursor class was the first locomotive class to be designed wholly by F. W. Webb. He had previously ordered further examples of his predecessor's Samson and Newton classes.

The class featured enclosed wheel splashers and cabs from new, but no brakes were initially fitted; some received steam brakes and others vacuum brakes.

They were fitted with 1500impgal tenders.

Fleet list

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