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Train Whistle
A train whistle or air whistle (originally referred to as a train trumpet or air trumpet) is an audible signaling device on a steam or gas locomotive, used to warn that the train is approaching, and to communicate with rail workers. Modern diesel and electric locomotives primarily use a powerful air horn instead of a whistle as an audible warning device. However, the word ''whistle'' continues to be used by railroaders in referring to such signaling practices as "whistling off" (sounding the horn when a train gets underway). The need for a whistle on a locomotive exists because trains move on fixed rails and thus are uniquely susceptible to collision. This susceptibility is exacerbated by a train's enormous weight and inertia, which make it difficult to quickly stop when encountering an obstacle. Hence a means of warning others of the approach of a train from a distance is necessary. As train whistles are inexpensive compared to other warning devices, the use of loud and dis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
60163 Tornado Front Whistle
6 (six) is the natural number following 5 and preceding 7. It is a composite number and the smallest perfect number. In mathematics A six-sided polygon is a hexagon, one of the three regular polygons capable of tessellation, tiling the plane. A hexagon also has 6 Edge (geometry), edges as well as 6 internal and external angles. 6 is the second smallest composite number. It is also the first number that is the sum of its proper divisors, making it the smallest perfect number. It is also the only perfect number that doesn't have a digital root of 1. 6 is the first unitary perfect number, since it is the sum of its positive proper unitary divisors, without including itself. Only five such numbers are known to exist. 6 is the largest of the four Harshad number, all-Harshad numbers. 6 is the 2nd superior highly composite number, the 2nd colossally abundant number, the 3rd triangular number, the 4th highly composite number, a pronic number, a congruent number, a harmonic divisor nu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Illinois Central
The Illinois Central Railroad , sometimes called the Main Line of Mid-America, is a railroad in the Central United States. Its primary routes connected Chicago, Illinois, with New Orleans, Louisiana, and Mobile, Alabama, and thus, the Great Lakes to the Gulf of Mexico. Another line connected Chicago west to Sioux City, Iowa (1870), while smaller branches reached Omaha, Nebraska (1899) from Fort Dodge, Iowa, and Sioux Falls, South Dakota (1877), from Cherokee, Iowa. The IC also ran service to Miami, Florida, on trackage owned by other railroads. The IC, founded in 1851, pioneered the financing later used by several long distance U.S. railroads whose construction was partially financed through a federal land grant. In 1998, the Canadian National Railway, via Grand Trunk Corporation, acquired control of the IC, and absorbed its operations the following year. The Illinois Central Railroad maintains its corporate existence as a non-operating subsidiary. In 1971, Steve Goodman rel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
General Code Of Operating Rules
The General Code of Operating Rules (GCOR) is a set of operating rules for railroads in the United States. The GCOR is used by Class I railroads west of Chicago, most of the Class II railroads, and many Short-line railroads. Some railroads in the northeast United States follow NORAC, while Canada and Mexico have their own set of operating rules that govern their railroad operations. Overview The GCOR rules are intended to enhance railroad safety. The rules cover employee responsibilities, signaling equipment, procedures for safe train movement, dealing with accidents and other topics that directly and indirectly affect railroad safety. Some railroads modify the GCOR rules to suit their specific operations. The GCOR is supplemented by System Special Instructions, Timetables, Hazardous Materials Instructions, Air Brake and Train Handling Instructions, and General Orders. These documents are issued by each individual railroad. System Special instructions, Timetables, and General O ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Train Horn
A train horn is an air horn used as an audible warning device on diesel and electric-powered trains. Its primary purpose is to alert persons and animals to an oncoming train, especially when approaching a level crossing. They are often extremely loud, allowing them to be heard from great distances. They are also used for acknowledging signals given by railroad employees, such as during switching operations. For steam locomotives, the equivalent device is a train whistle. History and background Since trains move on fixed rails, they are uniquely susceptible to collision. This is exacerbated by the train's enormous weight and inertia, which make it difficult to quickly stop when encountering an obstacle. Also, trains generally do not stop at level crossings, instead relying on pedestrians and vehicles to clear the tracks when they pass. Therefore, from their beginnings, locomotives have been equipped with loud horns or bells to warn vehicles and pedestrians that they are c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calliope (music)
A calliope (see #Pronunciation, below for pronunciation) is an American musical instrument that produces sound by sending a gas, originally steam or, more recently, compressed air, through large whistles—originally locomotive whistles. A calliope is typically very loud. Even some small calliopes are audible for miles. There is no way to vary timbre (music), tone or dynamics (music), volume. Musically, the only musical expression, expression possible is the pitch (music), pitch, rhythm, and duration (music), duration of the notes. The steam calliope is also known as a steam Pipe organ, organ ( in Quebec) or steam piano ( in Quebec). The air-driven calliope is sometimes called a calliaphone, the name given to it by Norman Baker (inventor), Norman Baker, but the "Calliaphone" name is registered by the Miner Company for instruments produced under the Tangley name. In the Steam power during the Industrial Revolution, age of steam, the steam calliope was particularly used on riverbo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Federal Railroad Administration
The Federal Railroad Administration (FRA) is an agency in the United States Department of Transportation (DOT). The agency was created by the Department of Transportation Act of 1966. The purpose of the FRA is to promulgate and enforce railroad, rail safety regulations, administer railroad assistance programs, conduct research and development in support of improved railroad safety and national rail transportation policy, provide for the rehabilitation of Northeast Corridor rail passenger service, and consolidate government support of rail transportation activities. The FRA is one of ten agencies within DOT concerned with intermodal freight transport, intermodal transportation. It operates through seven divisions under the offices of the Administrator and Deputy Administrator. These divisions are Financial Management and Administration, Chief Counsel, Civil Rights, Public Affairs, Public Engagement, Railroad Policy and Development, and Safety. It has a staff of about 850. Func ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ABC News (United States)
ABC News is the news division of the American television network ABC. Its flagship program is the daily evening newscast '' ABC World News Tonight with David Muir''; other programs include morning news-talk show '' Good Morning America'', ''Nightline'', '' 20/20'', and Sunday morning political affairs program '' This Week with George Stephanopoulos''. The network also includes daytime talk shows '' The View'', '' Live with Kelly and Mark'', and '' Tamron Hall''. In addition to the division's television programs, ABC News has radio and digital outlets, including ABC News Radio and ABC News Live, plus various podcasts hosted by ABC News personalities. History 20th-century origins ABC began in 1943 as the NBC Blue Network, a radio network that was spun off from NBC, as ordered by the Federal Communications Commission (FCC) in 1942. The reason for the order was to expand competition in radio broadcasting in the United States, specifically news and political broadcasting, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quality Of Life
Quality of life (QOL) is defined by the World Health Organization as "an individual's perception of their position in life in the context of the culture and value systems in which they live and in relation to their goals, expectations, standards and concerns". Standard indicators of the quality of life include wealth, employment, the environment, physical and mental health, education, recreation and leisure time, social belonging, religious beliefs, safety, security and freedom. QOL has a wide range of contexts, including the fields of international development, healthcare, politics and employment. Health related QOL (HRQOL) is an evaluation of QOL and its relationship with health. Engaged theory One approach, called the engaged theory, outlined in the journal of ''Applied Research in the Quality of Life'', posits four domains in assessing quality of life: ecology, economics, politics and culture. In the domain of culture, for example, it includes the following subd ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Decibel
The decibel (symbol: dB) is a relative unit of measurement equal to one tenth of a bel (B). It expresses the ratio of two values of a Power, root-power, and field quantities, power or root-power quantity on a logarithmic scale. Two signals whose level (logarithmic quantity), levels differ by one decibel have a power ratio of 101/10 (approximately ) or root-power ratio of 101/20 (approximately ). The strict original usage above only expresses a relative change. However, the word decibel has since also been used for expressing an Absolute scale, absolute value that is relative to some fixed reference value, in which case the dB symbol is often suffixed with letter codes that indicate the reference value. For example, for the reference value of 1 volt, a common suffix is "#Voltage, V" (e.g., "20 dBV"). As it originated from a need to express power ratios, two principal types of scaling of the decibel are used to provide consistency depending on whether the scaling refer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horn Loudspeaker
A horn loudspeaker is a loudspeaker or loudspeaker element which uses an horn (acoustic), acoustic horn to increase the overall efficiency of the driving element(s). A common form ''(right)'' consists of a compression driver which produces sound waves with a small metal diaphragm vibrated by an electromagnet, attached to a horn, a flaring duct to conduct the sound waves to the open air. Another type is a woofer driver mounted in a loudspeaker enclosure which is divided by internal partitions to form a zigzag flaring duct which functions as a horn; this type is called a ''folded horn'' speaker. The horn serves to improve the coupling efficiency between the speaker driver and the air. The horn can be thought of as an "acoustic transformer" that provides impedance matching between the relatively density, dense diaphragm material and the less-dense air. The result is greater acoustic output power from a given driver. The narrow part of the horn next to the driver is called the "throat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compressed Air
Compressed air is air kept under a pressure that is greater than atmospheric pressure. Compressed air in vehicle tires and shock absorbers are commonly used for improved traction and reduced vibration. Compressed air is an important medium for the transfer of energy in industrial processes and is used for power tools such as air hammer (fabrication), air hammers, Jackhammer, drills, power wrench, wrenches, and others, as well as to atomize paint, to operate air cylinders for automation, and can also be used to propel vehicles. Brakes applied by compressed air made large railway trains safer and more efficient to operate. Compressed air brakes are also found on large highway vehicles. Compressed air is used as a breathing gas by underwater diving, underwater divers. The diver may carry it in a high-pressure diving cylinder, or surface supplied diving, supplied from the surface at lower pressure through an air line or diver's umbilical. Similar arrangements are used in breathing ap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grade Crossing
A level crossing is an intersection where a railway line crosses a road, path, or (in rare situations) airport runway, at the same level, as opposed to the railway line or the road etc. crossing over or under using an overpass or tunnel. The term also applies when a light rail line with separate right-of-way or reserved track crosses a road in the same fashion. Other names include railway level crossing, railway crossing (chiefly international), grade crossing or railroad crossing (chiefly American), road through railroad, criss-cross, train crossing, and RXR (abbreviated). There are more than 100,000 level crossings in Europe and more than 200,000 in North America. Road-grade crossings are considered incompatible with high-speed rail and are virtually non-existent in European high-speed train operations. File:The 5.20 for West Kirby leaving Hoylake - geograph.org.uk - 1503619.jpg, A level crossing at Hoylake, Merseyside, England, with a train passing File:Level crossing in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
