The equivalent UIC classification is refined to (2'D)D1' for Mallet locomotives.
A locomotive of that length must be an articulated locomotive; meaning all have a joint between the first and second groups of driving wheels. All examples of this type are cab forwards. Normally, the leading truck sits under the smokebox and the trailing truck under the firebox. On a cab-forward, the leading truck supports the firebox and the trailing truck and smokebox are at the rear next to the tender. A 4-8-8-2 is effectively a 2-8-8-4 that always runs in reverse.
The Southern Pacific was the only railroad to operate engines of this wheel arrangement, all of which were built by the Baldwin Locomotive Works. A total of 195 were produced between 1928 and 1944 in eight batches. The later ones had cylinders 24 inches by 32 inches, drivers 63-1/2 inches and boiler pressures of 250 psi, giving a calculated tractive effort of 123,400 lb.[1]
The locomotives were built as cab-forwards to protect engine crews from exhaust smoke and heat in the many tunnels and snow sheds that were part of their usual routes.[1] Although commonly called Mallets these cab-forwards were built with simple expansion cylinders. The name stuck because the original classes of Southern Pacific cab-forwards were built as compound Mallets, though these were eventually converted to simple expansion machines.[2]
Southern Pacific 4294 is the only cab forward that was not scrapped when the locomotives were withdrawn from service. It was donated to the City of Sacramento, California in 1958, but had to be moved due to freeway construction. It was subsequently given to the State of California, and is on indoor static display at the California State Railroad Museum in Sacramento.[2][3]
References
^ ab"Southern Pacific 4-8-8-2 "Cab Forward" Locomotives in the USA". Steam locomotives dot com. Retrieved 6 March 2021.
^ ab"# 4294 Cab-In-Front Articulated Locomotive" (PDF). May 7, 1981. Retrieved January 1, 2020.
Diebert, Timothy S. & Strapac, Joseph A. (1987). Southern Pacific Company Steam Locomotive Compendium. Shade Tree Books. ISBN0-930742-12-5.
External links
Web Site of ToyTrains1 4-8-8-2 Cab Forward Steam Locomotives
February 24, 2023
this, article, multiple, issues, please, help, improve, discuss, these, issues, talk, page, learn, when, remove, these, template, messages, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reli. This article has multiple issues Please help improve it or discuss these issues on the talk page Learn how and when to remove these template messages This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources 4 8 8 2 news newspapers books scholar JSTOR January 2020 Learn how and when to remove this template message This article includes a list of references related reading or external links but its sources remain unclear because it lacks inline citations Please help to improve this article by introducing more precise citations January 2020 Learn how and when to remove this template message Learn how and when to remove this template message Under the Whyte notation for the classification of steam locomotives a 4 8 8 2 is a locomotive with four leading wheels two sets of eight driving wheels and a two wheel trailing truck Southern Pacific 4294 preserved at the California State Railroad Museum in Sacramento California Other equivalent classifications are UIC classification 2DD1 also known as German classification and Italian classification French classification 240 041Turkish classification 46 45Swiss classification 4 6 4 5The equivalent UIC classification is refined to 2 D D1 for Mallet locomotives A locomotive of that length must be an articulated locomotive meaning all have a joint between the first and second groups of driving wheels All examples of this type are cab forwards Normally the leading truck sits under the smokebox and the trailing truck under the firebox On a cab forward the leading truck supports the firebox and the trailing truck and smokebox are at the rear next to the tender A 4 8 8 2 is effectively a 2 8 8 4 that always runs in reverse Contents 1 Southern Pacific 2 References 2 1 General reference 3 External linksSouthern Pacific EditThe Southern Pacific was the only railroad to operate engines of this wheel arrangement all of which were built by the Baldwin Locomotive Works A total of 195 were produced between 1928 and 1944 in eight batches The later ones had cylinders 24 inches by 32 inches drivers 63 1 2 inches and boiler pressures of 250 psi giving a calculated tractive effort of 123 400 lb 1 The locomotives were built as cab forwards to protect engine crews from exhaust smoke and heat in the many tunnels and snow sheds that were part of their usual routes 1 Although commonly called Mallets these cab forwards were built with simple expansion cylinders The name stuck because the original classes of Southern Pacific cab forwards were built as compound Mallets though these were eventually converted to simple expansion machines 2 Southern Pacific 4294 is the only cab forward that was not scrapped when the locomotives were withdrawn from service It was donated to the City of Sacramento California in 1958 but had to be moved due to freeway construction It was subsequently given to the State of California and is on indoor static display at the California State Railroad Museum in Sacramento 2 3 References Edit a b Southern Pacific 4 8 8 2 Cab Forward Locomotives in the USA Steam locomotives dot com Retrieved 6 March 2021 a b 4294 Cab In Front Articulated Locomotive PDF May 7 1981 Retrieved January 1 2020 trucking business General reference Edit Diebert Timothy S amp Strapac Joseph A 1987 Southern Pacific Company Steam Locomotive Compendium Shade Tree Books ISBN 0 930742 12 5 External links EditWeb Site of ToyTrains1 4 8 8 2 Cab Forward Steam Locomotives Steam Locomotive com s Southern Pacific Cab Forward article including detailed specs Retrieved from https en wikipedia org w index php title 4 8 8 2 amp oldid 1131271174, wikipedia, wiki, book, books, library,
