Intermountain HO - SP AC-12 Cab Forward w/Tender Lettering, DCC w/Sound, 4292

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DescriptionManufacture Name: Intermountain Railway Scale: HO Type of Train: AC-12 Cab Forward Steam Locomotive Road Name: Southern Pacific Item Number: IR59005SH Road Number: 4292The first California cab-ahead design (also known as a cab-forward) was built in 1901 by William J. Thomas, master mechanic of the North Pacific Coast Railroad. Its unique design was possibly influenced by an Italian cab-ahead which had received much publicity in the trade press. The configuration provided the best visibility for locomotive engineers on sharp curves. Southern Pacific officials also recognized the value of the cab-forward as a design that would save engineers from being asphyxiated by smokestack fumes in SP's numerous long mountain tunnels and snowsheds. The first cab-forwards were delivered to SP by Baldwin in February 1910.The cab-forward design worked well on these large articulated locomotives. An articulated is equipped with two independent sets of driving wheels, able to follow the rails flexibly. They were often incorrectly called a Mallet. Named for its French designer, Anatole Mallet, the Mallet is not only articulated, but it is also compounded, meaning the steam is used more than once. The steam goes first to high pressure cylinders, then to low pressure cylinders. Early cab-aheads on the SP were Mallets..In total, Baldwin built read more

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