4-4-4-6

the 4-4-4-6 wheel arrangement was a proposed wheel arrangement for a steam locomotive, in the Whyte notation for describing locomotive wheel arrangements, is one with four leading wheels, two sets of four driving wheels, and six trailing wheels, much like 6-4-4-4 but reversed in the opposite direction.
===Other equivalent classifications are===
*UIC classification: 2BB3 (also known as German classification and Italian classification)
*French classification: 2223
==Proposed locomotive design==
Main article: Pennsylvania Railroad Class S1.The Pennsylvania Railroad Class S1 was originally going to use this wheel arrangement of 4-4-4-6, but, the Pennsylvania Railroad went for the 4-4-4-4 Wheel arrangement which would evolve into the 6-4-4-6 Wheel arrangement steam locomotive, which meant that the 4-4-4-6 wheel arrangement was never built.
Category:Unbuilt locomotives
Category:Wheel arrangements
Category:4-4-4-6 locomotives
Category:4-4-4-6 steam locomotives