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26 sie 2024 · The 2-6-6-4 wheel arrangement was a late era steam design first put into service during the mid-1930s on the Pittsburgh & West Virginia. Interestingly, while four railroads operated these locomotives they were never given a formal name like the Challenger, Big Boy, Allegheny, or Yellowstone.
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 are simple articulated locomotives.
Under the Whyte notation for the classification of steam locomotives, a 2-6-4 locomotive has two leading wheels, six coupled driving wheels and four trailing wheels.
17 cze 2006 · The 2-6-6-4’s four-wheel trailing truck was needed to support a large, deep firebox that was placed behind the rear driving wheels. This big firebox was critical to producing the high combustion rates required for a modern high-horsepower steam locomotive.
29 cze 2018 · By design, the Class 4 4-6-0 essentially BR’s version of the Great Western Railway’s (GWR) 7800 ‘Manor’ Class having similar power and dimensions, but incorporating many of BR’s time saving and maintenance reducing features.
Under the Whyte notation for the classification of steam locomotives by wheel arrangement, a 4-6-2+2-6-4 is a Garratt or Union Garratt articulated locomotive using a pair of 4-6-2 engine units back to back, with the boiler and cab suspended between them.
Whyte Notation divides the wheels of a steam locomotive into three sets: the driving wheels, these are the large, powered by steam through cylinders, pistons and linkages, wheels directly under the boiler. And the smaller wheels (if any) in front of the driving wheels, then the smaller wheels (if any) after the driving wheels.
