4-6-4

Under the Whyte notation for the classification of locomotives, 4-6-4 represents the wheel arrangement of four leading wheels, six powered and coupled driving wheels and four trailing wheels. In France where the type was first used, it is known as the Baltic while it became known as the Hudson in most of North America.

4-6-4 (Baltic, Hudson)
Equivalent classifications
UIC class2C2
French class232
Turkish class37
Swiss class3/7
Russian class2-3-2
First known tank engine version
First use1896
CountryColony of Natal
LocomotiveNGR Class H 4-6-4T
RailwayNatal Government Railways
DesignerGeorge William Reid
BuilderNatal Government Railways
Evolved from4-6-0T
BenefitsRan equally well in either direction
First known tender engine version
First use1911
CountryFrance
Locomotive4-cylinder compound Baltic
RailwayChemins de fer du Nord
DesignerGaston du Bousquet
BuilderChemins de Fer du Nord
Evolved from4-6-2
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