Integration MSc Course at the Speed dating Victoria Falls 40 plus of Birmingham. Institution of Railway Operators — courses at Certificate, Diploma and Degree level.
This page provides a modern list of terminology i. You can download a copy of the following . Railway Research Centre at the University of Birmingham. 6-wheeled bogies where the outer axles of each bogie are powered and the centre axle is unpowered or trailing.
US body for determination of railway engineering standards, equivalent to the European UIC. Final part of the process to introduce new types of rolling stock, onboard systems or infrastructure components to the railway network managed by Network Rail. Accommodation BridgeA bridge connecting two areas of land which were under common ownership but separated when the railway was built. Active SuspensionA recent development in train ride control, active suspension uses microprocessor control to detect changes in track formation or direction and then signal changes in the suspension configuration. In this way, sideways movements can be used to stiffen hydraulic resistance in dampers or induce hydraulic jacking movement to adjust body tilt.
The ratio of the tangential and normal forces that exist between the wheel and the rail at standstill and during motion. 4 for dry rail, but can be as low as 0. 01 for icy and greasy rail. Adjustment SwitchA device which allows longitudinal rail movement to dissipate thermal forces when CWR is adjacent to jointed track or other features not designed to withstand thermal forces. High speed tilting train, the development of which was abandoned by British Rail in the early 1980s. A version of the technology was later used by the Italians who produced a tilting train design known as «Pendolino». See air suspension and secondary suspension.
Air DryerA device provided to remove moisture from compressed air produced by a compressor. If moisture is allowed to pass into pipework, it collects in valves and systems, reducing efficiency and causing rust. Some older systems collected so much moisture than up to 20 gallons of water could be drained from a train. To remove it, an old oil drum was wheeled under the train and the main reservoirs drained directly into it. The car body rests on a set of the rubber air cushions or bags, two being arranged on each bogie bolster.
Compressed air is fed into the bags under the control of a levelling valve to ensure the correct pressure is maintained. Air bags are usually designed with a solid rubber core upon which the body will rest in the event of a burst bag. A clear track in a switching yard. Normally found in a diesel-electric locomotive, where it is driven by the diesel engine to provide power for the electric motors and auxiliary services on the train. Also used, prior to the introduction of inverters, for providing auxiliary supplies on electric trains, where the machine was powered from the traction current supply. They are normally positioned at vehicle ends to allow the inter-connecting hoses to be isolated and drained of air before being uncoupled.
Brake pipe angle cocks do not have bleed holes to drain hoses. Also used on some European high speed train designs. It has the benefit of reducing the number of bogies required for a train. Generally only suitable for lighter weight vehicles since the load on each axle is proportionally increased.
The signalling term meaning the indication given to the driver of an approaching train by a signal as in «the signal was showing a green aspect». It is said that a driver rarely ‘sees’ green aspects, only yellow and red ones. After all, he doesn’t need to recognise a green signal, he can just carry on at normal speed. Can be used on DC and AC electrified railways with suitable control electronics and on diesel-electric locomotives. For more information see the Electric Traction Pages Page.
The installation includes automatic line side signals, cab signals or both, actuated by a train or light engine by means of axle counters or track circuits. See also US Signalling, where the term ABS has a different meaning. A system that automatically operates a display of signal aspects in the cab of a train as well as the cab warning whistle. In Europe only used for Multiple Unit trains and specialised types of rolling stock. Careful specification and attention to design detail is required to ensure reliability. One is mindful of problems suffered by MUNI in San Francisco on their Boeing LRVs and by Eurotunnel and London Underground, all of whom use complex automatic couplers. Good advice is not to use them unless you really have to and can spend the money on looking after them.