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Reverser Handle
A reverser handle is an operating control for a railroad locomotive that is used to determine the direction of travel. The reverser usually has three positions: forward, reverse, and neutral. Operation When the reverser is in the forward or reverse position, the locomotive will move in the indicated direction when the throttle is opened. Removing the reverser handle from the control stand in the neutral position locks the throttle controller, effectively disabling the locomotive. The reverser lever is sometimes referred to as a "railroad key." History A reversing mechanism of some type has been present on locomotives almost since inception. The reversing lever on a steam locomotive is sometimes called a Johnson Bar. The style of reverser used on internal combustion locomotives has been in use since at least the early 1900s but as late as 1996 patented improvements have been made to the design and operation. See also *Rail terminology *Reversing gear *Cutoff (steam engine) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reverser Handles
Reverser may refer to: *Thrust reverser *Reversing gear Reversing gear is a mechanism used to both control the direction of travel of a steam locomotive and adjust its engine's steam cutoff. Reversing lever The most common form of reversing gear uses a lever to engage (known as a ''Johnson bar'' in ..., often called a reverser, controls the valves on a steam engine * Reverser handle, an operating lever for a locomotive {{Disambig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Railroad
Rail transport (also known as train transport) is a means of transport using wheeled vehicles running in railway track, tracks, which usually consist of two parallel steel railway track, rails. Rail transport is one of the two primary means of land transport, next to road transport. It is used for about 8% of passenger and rail freight transport, freight transport globally, thanks to its Energy efficiency in transport, energy efficiency and potentially high-speed rail, high speed.Rolling stock on rails generally encounters lower friction, frictional resistance than rubber-tyred road vehicles, allowing rail cars to be coupled into longer trains. Power is usually provided by Diesel locomotive, diesel or Electric locomotive, electric locomotives. While railway transport is capital intensity, capital-intensive and less flexible than road transport, it can carry heavy loads of passengers and cargo with greater energy efficiency and safety. Precursors of railways driven by human or an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Locomotive
A locomotive is a rail transport, rail vehicle that provides the motive power for a train. Traditionally, locomotives pulled trains from the front. However, Push–pull train, push–pull operation has become common, and in the pursuit for longer and heavier freight trains, companies are increasingly using distributed power: single or multiple locomotives placed at the front and rear and at intermediate points throughout the train under the control of the leading locomotive. Etymology The word ''locomotive'' originates from the Latin language, Latin 'from a place', Ablative case, ablative of 'place', and the Medieval Latin 'causing motion', and is a shortened form of the term ''locomotive engine'', which was first used in 1814 to distinguish between self-propelled and stationary steam engines. Classifications Prior to locomotives, the motive force for railways had been generated by various lower-technology methods such as human power, horse power, Gravity railroad, g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Relative Direction
In geometry, direction, also known as spatial direction or vector direction, is the common characteristic of all ray (geometry), rays which coincide when translation (geometry), translated to share a common endpoint; equivalently, it is the common characteristic of vector (geometry), vectors (such as the relative position between a pair of points) which can be made equal by scaling (geometry), scaling (by some positive scalar multiplication, scalar multiplier). Two vectors sharing the same direction are said to be ''codirectional'' or ''equidirectional''. All codirectional line segments sharing the same size (length) are said to be ''equipollent (geometry), equipollent''. Two equipollent segments are not necessarily coincident; for example, a given direction can be evaluated at different starting Position (geometry), positions, defining different unit directed line segments (as a bound vector instead of a free vector). A direction is often represented as a unit vector, the res ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Throttle
A throttle is a mechanism by which fluid flow is managed by construction or obstruction. An engine's power can be increased or decreased by the restriction of inlet gases (by the use of a throttle), but usually decreased. The term ''throttle'' has come to refer, informally, to any mechanism by which the power or speed of an engine is regulated, such as a car's accelerator pedal. What is often termed a ''throttle'' (in an aviation context) is also called a thrust lever, particularly for jet engine powered aircraft. For a steam locomotive, the valve which controls the steam is known as the regulator. Internal combustion engines In an internal combustion engine, the throttle is a means of controlling an engine's power by regulating the amount of fuel or air entering the engine. In a motor vehicle the control used by the driver to regulate power is sometimes called the throttle, accelerator, or gas pedal. For a gasoline engine, the throttle most commonly regulates the amount of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Control Stand
A control stand is a diesel-electric locomotive subsystem which integrates engine functional controls and brake functional controls, whereby all functional controls are "at hand" (within reach of the locomotive engineer from their customary seating position, facing forward at all times). The control stand can be on either the left or right hand side of the cab, depending on region. Normally, a control stand is oriented in the direction labeled "F" (front of the locomotive). Although front is usually the " short hood," a seldom-used alternate designates the " long hood" as front, such as on the Victorian Railways X class. Where operations in both directions are required, two control stands (" dual control stands") may be provided. The early control stands were designed to Association of American Railroads (AAR) standards. The traditional AAR control stand is still preferred by some railroads. Current control stands may employ multiple displays and electronic actuation of operat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steam Locomotive
A steam locomotive is a locomotive that provides the force to move itself and other vehicles by means of the expansion of steam. It is fuelled by burning combustible material (usually coal, Fuel oil, oil or, rarely, Wood fuel, wood) to heat water in the locomotive's Boiler (power generation), boiler to the point where it becomes gaseous and its volume increases 1,700 times. Functionally, it is a steam engine on wheels. In most locomotives, the steam is admitted alternately to each end of its Steam locomotive components, cylinders in which pistons are mechanically connected to the locomotive's main wheels. Fuel and water supplies are usually carried with the locomotive, either on the locomotive itself or in a Tender (rail), tender coupled to it. #Variations, Variations in this general design include electrically powered boilers, turbines in place of pistons, and using steam generated externally. Steam locomotives were first developed in the United Kingdom of Great Britain an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Johnson Bar (locomotive)
Reversing gear is a mechanism used to both control the direction of travel of a steam locomotive and adjust its engine's steam cutoff. Reversing lever The most common form of reversing gear uses a lever to engage (known as a ''Johnson bar'' in the United States) mounted parallel to the direction of travel on the driver’s side of the cab. It is controlled by a handle and sprung trigger at the top, and pivots at the bottom to pass between two notched sector plates. The reversing rod, which connects to the valve gear, is attached to the lever either above or below the pivot in an alignment that gives good leverage. A square pin is arranged to engage with notches cut in the plates and holds the lever (and valve gear) in the desired position when the trigger is released. The advantages of this design are that change between forward and reverse gear can be made very quickly (as is needed in, for example, a shunting engine). Limitations and drawbacks The reversing lever has a cat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diesel Locomotive
A diesel locomotive is a type of railway locomotive in which the prime mover (locomotive), power source is a diesel engine. Several types of diesel locomotives have been developed, differing mainly in the means by which mechanical power is conveyed to the driving wheels. The most common are diesel–electric locomotives and diesel–hydraulic. Early internal combustion engine, internal combustion locomotives and railcars used kerosene and gasoline as their fuel. Rudolf Diesel patented his first compression-ignition engine in 1898, and steady improvements to the design of diesel engines reduced their physical size and improved their power-to-weight ratios to a point where one could be mounted in a locomotive. Internal combustion engines only operate efficiently within a limited power band, and while low-power gasoline engines could be coupled to mechanical transmission (mechanics), transmissions, the more powerful diesel engines required the development of new forms of transmiss ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rail Terminology
Rail or rails may refer to: Rail transport *Rail transport and related matters *Railway track or railway lines, the running surface of a railway Arts and media Film * ''Rails'' (film), a 1929 Italian film by Mario Camerini * ''Rail'' (1967 film), a film by Geoffrey Jones for British Transport Films * ''Rail'' (2024 film), a Tamil-language film Magazines * ''Rail'' (magazine), a British rail transport periodical * ''Rails'' (magazine), a former New Zealand based rail transport periodical Other arts *The Rails, a British folk-rock band * Rail (theater) or batten, a pipe from which lighting, scenery, or curtains are hung Technology *Rails framework or Ruby on Rails, a web application framework *Rail system (firearms), a mounting system for firearm attachments * Front engine dragster *Runway alignment indicator lights, a configuration of an approach lighting system *Rule Augmented Interconnect Layout, a specification for expressing guidelines for printed circuit boards; companio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reversing Gear
Reversing gear is a mechanism used to both control the direction of travel of a steam locomotive and adjust its engine's steam cutoff. Reversing lever The most common form of reversing gear uses a lever to engage (known as a ''Johnson bar'' in the United States) mounted parallel to the direction of travel on the driver’s side of the cab. It is controlled by a handle and sprung trigger at the top, and pivots at the bottom to pass between two notched sector plates. The reversing rod, which connects to the valve gear, is attached to the lever either above or below the pivot in an alignment that gives good leverage. A square pin is arranged to engage with notches cut in the plates and holds the lever (and valve gear) in the desired position when the trigger is released. The advantages of this design are that change between forward and reverse gear can be made very quickly (as is needed in, for example, a shunting engine). Limitations and drawbacks The reversing lever has a cat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cutoff (steam Engine)
In a steam engine, cutoff is the point in the piston stroke at which the inlet valve is closed. On a steam locomotive, the cutoff is controlled by the reversing gear. The point at which the inlet valve closes and stops the entry of steam into the cylinder from the boiler plays a crucial role in the control of a steam engine. Once the valve has closed, steam trapped in the cylinder expands adiabatically. The steam pressure drops as it expands. A late cutoff delivers full steam pressure to move the piston through its entire stroke, for maximum start-up forces. But, since there will still be unexploited pressure in the cylinder at the end of the stroke, this is achieved at the expense of engine efficiency. In this situation the steam will still have considerable pressure remaining when it is exhausted resulting in the characteristic “chuff chuff” sound of a steam engine. An early cutoff has greater thermodynamic efficiency but results in a lower mean effective pressure so les ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
