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Under the Whyte notation, a 2-8-4 is a steam locomotive that has two unpowered leading wheels, followed by eight coupled and powered driving wheels, and four trailing wheels. This locomotive type is most often referred to as a Berkshire, though the Chesapeake and Ohio Railway used the name Kanawha for their 2-8-4s.
The development of the 2-8-4 wheel arrangement for steam locomotives was a result of an effort by the Lima Locomotive Works to improve on the speed and horse power of the USRA Mikado (2-8-2) locomotive, which was designed by the United States Railroad Administration during World War I.
Pere Marquette 1225 is a class "N-1" 2-8-4 "Berkshire" type steam locomotive built in October 1941 for the Pere Marquette Railway (PM) by Lima Locomotive Works (LLW) in Lima, Ohio.
A "Berkshire" type steam locomotive refers to a steam locomotive built with a 2-8-4 wheel configuration. The design was initially intended to improve on the USRA Heavy Mikado design ( 2-8-2 ), which was deemed to lack sufficient speed and horsepower.
The 2-8-4 Berkshire , a triumph of engineering elegance and functionality, stands out as one of the most stunning steam locomotives designed for medium to heavy-duty tasks. Renowned not only for their visual appeal, these engines also demonstrated remarkable prowess in hauling substantial freight loads.
29 Ιουν 2006 · It dramatically outperformed a two-year-old heavy 2-8-2. The B&A subsequently ordered 55 copies and the 2-8-4 got a name – Berkshire. The prototype locomotive then successfully demonstrated on several more railroads, and Lima got orders from Boston & Maine, Illinois Central, and Missouri Pacific.
Erie 2-8-4 "Berkshire" Locomotives in the USA. The Erie Railroad bought more "Berkshire" type locomotives than any other railroad and was the only one to have purchased them from each of the big three locomotive builders.
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