What does 2-6-6-4 mean?

Definitions for 2-6-6-4

Here are all the possible meanings and translations of the word 2-6-6-4.


  1. 2-6-6-4(Noun)

    Under the Whyte notation system, a Mallet-type locomotive with two leading wheels on a leading truck, two sets of six driving wheels, and four trailing wheels on a trailing truck.


  1. 2-6-6-4

    In the Whyte notation for the classification of steam locomotive wheel arrangement, a 2-6-6-4 is a locomotive with a two-wheel leading truck, two sets of six driving wheels, and a four-wheel trailing truck. All 2-6-6-4s have been articulated locomotives, of the Mallet or related simple articulated type. Other equivalent classifications are: ⁕UIC classification: C2' ⁕French classification: 130+032 ⁕Turkish classification: 34+35 ⁕Swiss classification: 3/4+3/5 The UIC classification is refined to C2' for Mallet locomotives. The 2-6-6-4 was a fairly late development, a product of the superpower steam concept, introduced by the Lima Locomotive Works, which encouraged the use of large fireboxes supported by four-wheel trailing trucks. Such a firebox could sustain a rate of steam generation to meet any demands of the locomotive's cylinders, even at high speed. High speeds were certainly among the design goals for a 2-6-6-4; most of the type were intended for use on fast freight trains. The first 2-6-6-4s built in the United States were for the Pittsburgh & West Virginia Railroad, and these were not high speed locomotives but rather mountain luggers. They received three in 1934 and four more in 1937.


  1. Chaldean Numerology

    The numerical value of 2-6-6-4 in Chaldean Numerology is: 0

  2. Pythagorean Numerology

    The numerical value of 2-6-6-4 in Pythagorean Numerology is: 0

Images & Illustrations of 2-6-6-4

  1. 2-6-6-42-6-6-42-6-6-4


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