2-8-8-0
Encyclopedia
In the Whyte notation
for the classification of steam locomotive
s by wheel arrangement
, a 2-8-8-0 is a locomotive with a two-wheel leading truck, two sets of eight driving wheel
s, and no trailing truck.
The UIC classification
is refined to (1'D)D for Mallet locomotives.
operated this type; and it was called the "Bull Moose" by Union Pacific crews.
Whyte notation
The Whyte notation for classifying steam locomotives by wheel arrangement was devised by Frederick Methvan Whyte and came into use in the early twentieth century encouraged by an editorial in American Engineer and Railroad Journal...
for the classification of steam locomotive
Steam locomotive
A steam locomotive is a railway locomotive that produces its power through a steam engine. These locomotives are fueled by burning some combustible material, usually coal, wood or oil, to produce steam in a boiler, which drives the steam engine...
s by wheel arrangement
Wheel arrangement
In rail transport, a wheel arrangement is a system of classifying the way in which wheels are distributed beneath a locomotive.. Several notations exist to describe the wheel assemblies of a locomotive by type, position, and connections, with the adopted notations varying by country...
, a 2-8-8-0 is a locomotive with a two-wheel leading truck, two sets of eight driving wheel
Driving wheel
On a steam locomotive, a driving wheel is a powered wheel which is driven by the locomotive's pistons...
s, and no trailing truck.
Equivalent classifications
Other equivalent classifications are:- UIC classificationUIC classificationThe UIC classification of locomotive axle arrangements describes the wheel arrangement of locomotives, multiple units and trams. It is set out in the International Union of Railways "Leaflet 650 - Standard designation of axle arrangement on locomotives and multiple-unit sets". It is used in much...
: 1DD (also known as German classification and Italian classification) - French classification: 140+040
- Turkish classificationTurkish classificationIn the Turkish classification system for railway locomotives, the number of powered axles are followed by the total number of axles. It is identical to the Swiss system except that the latter places a slash between the two numbers.Thus0-6-0 becomes 33...
: 45+44 - Swiss classification: 4/5+4/4
The UIC classification
UIC classification
The UIC classification of locomotive axle arrangements describes the wheel arrangement of locomotives, multiple units and trams. It is set out in the International Union of Railways "Leaflet 650 - Standard designation of axle arrangement on locomotives and multiple-unit sets". It is used in much...
is refined to (1'D)D for Mallet locomotives.
Examples
The Great Northern Railway and the Union Pacific RailroadUnion Pacific Railroad
The Union Pacific Railroad , headquartered in Omaha, Nebraska, is the largest railroad network in the United States. James R. Young is president, CEO and Chairman....
operated this type; and it was called the "Bull Moose" by Union Pacific crews.