A buffer stop, bumper, bumping post, bumper block or stopblock (US), is a device to prevent railway vehicles from going past the end of a physical section of track.
The design of the buffer stop is dependent, in part, on the kind of couplings that the railway uses, since the coupling gear is the first part of the vehicle that the buffer stop touches. The term "buffer stop" is of British origin, since railways in Great Britain principally use buffer-and-screw couplings between vehicles.
Several different types of buffer stop have been developed. They differ depending on the type of coupler used and on the intended application.
If there is extra room behind the bumper block, there is usually a sand or ballast drag that is designed to further retard a runaway train. One such accident occurred in 1975 on the London Underground system, when a Northern City Line train powered past the bumper block at Moorgate station.
Largely because of its mass, a train transfers an enormous amount of kinetic energy in a collision with a buffer stop. Rigid buffers can safely cope only with very low-speed impacts. (i.e., nearly stationary). To improve stopping performance, a way of dissipating this energy is needed, through compression or friction. Following a buffer stop accident at Frankfurt am Main in 1902, the Rawie company developed a large range of energy-absorbing buffer stops. Similar hydraulic buffer stops were developed by Ransomes & Rapier in the UK.[ citation needed ]
Wheel stops or car stops are used to stop small numbers of light vehicles at the end of level storage tracks or to chock individual railroad cars on shallow grades. [2] [3] [4] [5] [6]
A buffer is a part of the buffers and chain coupler system used on the railway systems of many countries, among them most of those in Europe, for attaching railway vehicles together.
The Thirsk rail crash occurred on 31 July 1967 at Thirsk, Yorkshire, England on the British Rail East Coast Main Line.
In a railway accident, telescoping occurs when the underframe of one vehicle overrides that of another, and smashes through the second vehicle's body. The term is derived from the resulting appearance of the two vehicle bodies: the body of one vehicle may appear to be slid inside the other like the tubes of a collapsible telescope – the body sides, roof and underframe of the latter vehicle being forced apart from each other.
There have been a number of train accidents on the railway network of Victoria, Australia. Some of these are listed below.
The railways of New South Wales, Australia have had many incidents and accidents since their formation in 1831. There are close to 1000 names associated with rail-related deaths in NSW on the walls of the Australian Railway Monument in Werris Creek. Those killed were all employees of various NSW railways. The details below include deaths of employees and the general public.
The 2015 Uttar Pradesh train accident occurred on 20 March 2015. The Dehradun Varanasi Janata Express derailed near Bachhrawan in Raebareli, Uttar Pradesh, northern India, resulting in at least 58 deaths and 150 people being injured. The accident was attributed to brake failure.
[las pericias] constataron [...] que los paragolpes no contaban con su sistema hidráulico en funcionamiento [...]