4-6-6 Definition
noun
Under the Whyte notation system, a Mallet-type locomotive with four leading wheels on a leading truck, two sets of six driving wheels, and two trailing wheels on a trailing truck.
Wiktionary
Under the Whyte notation system, a Mallet-type locomotive with four leading wheels on a leading truck, two sets of six driving wheels, and four trailing wheels on a trailing truck.
Wiktionary
Advertisement
Other Word Forms of 4-6-6
Noun
Singular:
4-6-6
Plural:
4-6-6-2s, 4-6-6-4s