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2-8-8-8-8-2
Under the Whyte notation for the classification of steam locomotives, a 2-8-8-8-8-2 has two leading wheels, four sets of eight driving wheels, and two trailing wheels. Because of its length, such a locomotive must be an multiplex locomotive. It is longer than a normal articulated locomotive; the fourth set of drivers is located under the tender. Other equivalent classifications are: UIC classification: 1-D-D-D-D-1 (also known as German classification and Italian classification) AAR classification: 1-D-D-D-D-1 French classification: 140+040+040+041 Turkish classification: 45+44+44+45 Swiss classification: 4/5+4/4+4/4+4/5 The equivalent UIC classification is to be refined to (1'D)DD(D1'). Usage This type of articulated locomotive was never built, the only proposal for such a locomotive came from the United States. George R. Henderson was granted US Patent 1,100,563 for a quadruplex locomotive, in June 1914. The patent was assigned to the Baldwin Locomotive Company. Baldwin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jointed-boiler Locomotive
A jointed-boiler locomotive was a variant of the Mallet articulated locomotive, in which a flexible coupling was introduced midway along the length of the boiler casing, which allowed the boiler to bend laterally when the locomotive was on curved track. Six such locomotives, all of 2-6-6-2 wheel arrangement, were built for the Atchison, Topeka & Santa Fe Railroad in 1910 and 1911. The first one built, number 1157, was assembled by the AT&SF in their Topeka shops from two 2-6-2’s (numbers 1051 and 1125). All the rest were built new by Baldwin Locomotive Works. Design In a conventional Mallet, the rigid boiler is fixed to the rearmost of the two engine frames, with the front of the boiler supported on a sliding bearing over the pivoting front engine such that when the locomotive traverses a curved track, the front ( smokebox) end of the boiler overhangs toward the outside of the curve. The jointed boiler, with the front half rigidly fixed to the front engine, eliminated this over ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Multiplex Locomotive
A multiplex locomotive is a steam locomotive that divides the driving force on its wheels by using multiple pairs of cylinders to drive multiple driving wheel set groups. Such a locomotive will necessarily articulated if it has more than two sets of driving wheels. There were locomotive projects with three, four, five or six sets of drive wheels. However, these locomotives were never built, except for four triplex locomotives in the United States and one quadruplex locomotive in Belgium. The names of the subgroups of multiplex locomotives is derived from the number of drive wheel sets and is composed of the numeral prefix and the word ''locomotive''. However, ''locomotive'' is often omitted if it can be inferred from the context. Duplex locomotives The terms '' duplex locomotive'' and ''Divided drive locomotive'' are used to describe locomotives with two drive wheel sets mounted in a rigid frame. The concept of the duplex locomotive originated in the early development ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
