USRA Light Mikado

USRA Light Mikado

Infobox Locomotive
name = USRA Light Mikado
powertype = Steam


whytetype = 2-8-2
uicclass = 1'D1'
builder = ALCO, Baldwin, Lima
totalproduction = 625 originals plus 641 copies
gauge = 4 ft 8½ in (1,435 mm)
leadingsize = 33 in (838 mm)
driversize = 63 in (1,600 mm)
trailingsize = 43 in (1.092 mm)
wheelbase = "locomotive": 36 ft 1 in (11.00 m)
" + tender": 71 ft 4½ in (21.76 m)
valvegear = Walschaerts
cylindercount = 2
cylindersize = 26×30 in (660×762 mm)
boilerpressure = 200 lb/in² (1.38 MPa)
fueltype = CoalThe USRA Light Mikado was a USRA standard class of steam locomotive designed under the control of the United States Railroad Administration, the nationalized railroad system in the United States during World War I. This was the standard light freight locomotive of the USRA types, and was of 2-8-2 wheel arrangement in the Whyte notation, or 1'D1' in UIC classification.

A total of 625 locomotives were built under the auspices of the USRA, with a further 641 copies built after the end of the USRA's control. The first, for the Baltimore and Ohio Railroad, was completed in July 1918 and given #4500. The locomotives were considered well designed and modern, and were popular and successful. Large numbers remained in service until replaced by diesel locomotives.

With later copies, over 50 railroads used the type, including the following:

Originals: (and copies)
* Baltimore and Ohio Railroad
* Chicago and Alton Railroad
* Cleveland, Cincinnati, Chicago and St. Louis Railway
* Chicago and Eastern Illinois Railroad
* Chicago Great Western Railway
* Cincinnati, New Orleans and Texas Pacific Railway
* Grand Trunk Railway
* Kansas, Oklahoma and Gulf Railway
* Lake Erie and Western Railroad
* Lehigh and Hudson River Railroad
* Louisville and Nashville Railroad
* Maine Central Railroad
* Michigan Central Railroad
* Missouri Pacific Railroad
* Monon Railroad
* Monongahela Railway
* New York Central Railroad
* New York, Chicago and St. Louis Railroad
* Oregon Short Line
* Pere Marquette Railroad
* Pittsburgh and West Virginia Railway
* Rock Island Railroad
* Rutland Railroad
* Seaboard Air Line Railroad
* St. Louis - San Francisco Railroad
* Southern Railway
* Toledo and Ohio Central Railroad
* Texas and Pacific Railroad
* Union Pacific Railroad
* Wabash Railroad

Copies only:
* Akron, Canton and Youngstown Railroad
* Atlanta and West Point Railroad
* Atlantic Coast Line Railroad
* Alabama Great Southern Railroad
* Canadian National Railway (Grand Trunk)
* Chesapeake and Ohio Railroad
* Chicago and Illinois Midland Railway
* Detroit and Toledo Shore Line Railroad
* Florida East Coast Railroad
* Grand Rapids and Indiana Railroad
* Georgia Railroad
* Gulf, Mobile and Ohio Railroad
* Midland Valley Railroad
* Ferrocarriles Nacionales de México
* Oklahoma City-Ada-Atoka Railway
* Pennsylvania Railroad
* Western Railway of Alabama


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