In rail transport, the expression power car may refer to either of two distinct types of rail vehicle: *a vehicle that propels, and commonly also controls, a

passenger train A passenger train is a train used to transport people along a railroad line. These trains may consist of unpowered passenger railroad cars (also known as coaches or carriages) hauled by one or more locomotives, or may be self-propelled; self pr ...

multiple unit A multiple-unit train or simply multiple unit (MU) is a self-propelled train composed of one or more carriages joined together, which when coupled to another multiple unit can be controlled by a single driver, with multiple-unit train contr ...

or tram, often as the lead vehicle; *a vehicle equipped with machinery for supplying heat or electrical power to other parts of a train. The first of these types of vehicle is closely related to the

locomotive A locomotive or engine is a rail transport vehicle that provides the Power (physics), motive power for a train. If a locomotive is capable of carrying a payload, it is usually rather referred to as a multiple unit, Motor coach (rail), motor ...

. What differentiates the locomotive and the first type of power car is their construction or use. A locomotive can be physically separated from its train and does nothing but provide propulsion and control (and heat or electricity for passenger trains). On the other hand, a power car of the first type is frequently an integral part of its train, and if the train uses distributed traction, some of the car's interior space may be used for carrying passengers or cargo.

Examples

United States

Nearly all high speed trains use power cars, frequently at both ends. An example of these are the Acela Express trainsets in use by Amtrak, which are built by Bombardier in Canada using technology licensed from France's Alstom. The twenty Acela trainsets operate between Washington, D.C. and Boston, Massachusetts. Each trainset consists of six passenger cars and two power cars.

United Kingdom

Another traditional example would be the older InterCity 125, made for and used by

British Rail British Railways (BR), which from 1965 traded as British Rail, was a state-owned company that operated most of the overground rail transport in Great Britain from 1948 to 1997. It was formed from the nationalisation of the Big Four British rai ...

and several subsequent privatised bodies like

Great Western Railway The Great Western Railway (GWR) was a British railway company that linked London with the southwest, west and West Midlands of England and most of Wales. It was founded in 1833, received its enabling Act of Parliament on 31 August 1835 and ran ...

New Zealand

Multiple unit A multiple-unit train or simply multiple unit (MU) is a self-propelled train composed of one or more carriages joined together, which when coupled to another multiple unit can be controlled by a single driver, with multiple-unit train contr ...

s ( diesel or electric) usually have a mix of power cars and trailers, often with one of each in a pair which can be coupled to other pairs to form a larger train; see e.g. New Zealand FP class electric multiple unit.

Australia

The

NSW TrainLink NSW TrainLink is a train and coach operator in Australia, providing services throughout New South Wales and the Australian Capital Territory, along with limited interstate services into Victoria, Queensland and South Australia. Its primary interc ...

XPT, which is based on the InterCity 125, has a power car at each end, one pulling and the other pushing. The Queensland Rail Diesel Tilt Train also has two power cars. Electric Multiple Units, such as the Sydney Trains C set, have power cars on each end with trailer cars in the middle.

References

{{DEFAULTSORT:Power Car Rolling stock