0-4-0 locomotives

British-built railroad steam locomotive

early steam locomotive

preserved early British steam locomotive

locomotive

early British locomotive

Under the Whyte notation for the classification of steam locomotives, '''''' represents one of the simplest possible types, that with two axles and four coupled wheels, all of which are driven. The wheels on the earliest four-coupled locomotives were connected by a single gear wheel, but from 1825 the wheels were usually connected with coupling rods to form a single driven set.

steam-powered railroad locomotive

early American 0-4-0 locomotive built in Great Britain