User:The Mirror Cracked/test

Wheel arrangement
While a tender locomotive might be described as an, the equivalent tank locomotive would be described as an for a side tank and an  for a saddle tank. The suffix 'PT' indicates a pannier tank, 'WT' a well tank, and 'CT' a crane tank.

Because tank locomotives are capable of running equally fast in both directions (see below) they usually have symmetrical wheel arrangements to ensure the same ride and stability characteristics regardless of the direction travelled, producing arrangements with only driving wheels (eg and ) or equal numbers of leading and trailing wheels (eg  and ). However other requirements, such as the need to support a large bunker, would require a non-symmetrical layout such as.