2-4-4-0
Encyclopedia
In the Whyte notation
for the classification of steam locomotive
wheel arrangement
, a 2-4-4-0 is a locomotive with two leading truck, two sets of four driving wheel
s, and no trailing truck. Examples of this type were constructed as Mallet
locomotives.
built three for the Vivarais system in 1908 and two for the Lozère system in 1909.
The UIC classification
is 1B'B.
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...
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 2-4-4-0 is a locomotive with two leading truck, two sets of four 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. Examples of this type were constructed as Mallet
Mallet locomotive
The Mallet Locomotive is a type of articulated locomotive, invented by a Swiss engineer named Anatole Mallet ....
locomotives.
Examples
The Chemins de Fer Departmentaux Vivarais and the Chemins de Fer Departmentaux Lozère each possessed 2-4-4-0 Mallet locomotives. The Société Alsacienne de Constructions MécaniquesSociété Alsacienne de Constructions Mécaniques
The Société Alsacienne de Constructions Mécaniques [Society of Alsatian mechanical engineering] was an engineering company with its headquarters in Mulhouse, Alsace which produced railway locomotives, textile and printing machinery, diesel engines, boilers, lifting equipment, firearms and mining...
built three for the Vivarais system in 1908 and two for the Lozère system in 1909.
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...
: 1BB (also known as German classification and Italian classification) - French classification: 120+020
- 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...
: 23+22 - Swiss classification: 2/3+2/2
- Russian classification: 1-2-0+0-2-0
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 1B'B.