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AAR Type A Switcher Truck
AAR Type A trucks were first introduced with EMD locomotives sold in 1935; they were a success, became standard on EMD switchers into the 1970s, and were also used on various other makers' locomotives. Their initial design was a collaboration between Martin P Blomberg at EMD and the originating foundry General Steel Industries. Intended for industrial plant and rail yard shunting duty, this truck has a basic suspension system with drop equalizers, secondary leaf springs and primary coil springs, which provide adequate damping and relatively simplified maintenance. It does not have swing hangers as may be seen in higher-speed designs such as the Blomberg B. See also * Blomberg B * Bogie A bogie ( ) (in some senses called a truck in North American English) is a chassis or framework that carries a wheelset, attached to a vehicle—a modular subassembly of wheels and axles. Bogies take various forms in various modes of transp ... Bogie {{diesel-loco-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rigid Switcher
Rigid or rigidity may refer to: Mathematics and physics *Stiffness, the property of a solid body to resist deformation, which is sometimes referred to as rigidity * Structural rigidity, a mathematical theory of the stiffness of ensembles of rigid objects connected by hinges * Rigidity (electromagnetism), the resistance of a charged particle to deflection by a magnetic field * Rigidity (mathematics), a property of a collection of mathematical objects (for instance sets or functions) * Rigid body, in physics, a simplification of the concept of an object to allow for modelling *Rigid transformation, in mathematics, a rigid transformation preserves distances between every pair of points * Rigidity (chemistry), the tendency of a substance to retain/maintain their shape when subjected to outside force *(Modulus of) rigidity or shear modulus (material science), the tendency of a substance to retain/maintain their shape when subjected to outside force Medicine * Rigidity (neurology ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bogie
A bogie ( ) (in some senses called a truck in North American English) is a chassis or framework that carries a wheelset, attached to a vehicle—a modular subassembly of wheels and axles. Bogies take various forms in various modes of transport. A bogie may remain normally attached (as on many railroad cars and semi-trailers) or be quickly detachable (as the dolly in a road train or in railway bogie exchange); it may contain a suspension within it (as most rail and trucking bogies do), or be solid and in turn be suspended (as most bogies of tracked vehicles are); it may be mounted on a swivel, as traditionally on a railway carriage or locomotive, additionally jointed and sprung (as in the landing gear of an airliner), or held in place by other means (centreless bogies). In Scotland, the term is used for a child’s (usually home-made) wooden cart. While ''bogie'' is the preferred spelling and first-listed variant in various dictionaries, bogey and bogy are also used. Rai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electro-Motive Diesel
Progress Rail Locomotives, doing business as Electro-Motive Diesel (EMD), is an American manufacturer of diesel-electric locomotives, locomotive products and diesel engines for the rail industry. The company is owned by Caterpillar through its subsidiary Progress Rail. Electro-Motive Diesel traces its roots to the Electro-Motive Engineering Corporation, a designer and marketer of gasoline-electric self-propelled rail cars founded in 1922 and later renamed Electro-Motive Company (EMC). In 1930, General Motors purchased Electro-Motive Company and the Winton Engine Co., and in 1941 it expanded EMC's realm to locomotive engine manufacturing as Electro-Motive Division (EMD). In 2005, GM sold EMD to Greenbriar Equity Group and Berkshire Partners, which formed Electro-Motive Diesel to facilitate the purchase. In 2010, Progress Rail completed the purchase of Electro-Motive Diesel from Greenbriar, Berkshire, and others. EMD's headquarters, engineering facilities and parts manufacturing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Switcher
A switcher, shunter, yard pilot, switch engine, yard goat, or shifter is a small railroad locomotive used for manoeuvring railroad cars inside a rail yard in a process known as ''switching'' (US) or ''shunting'' (UK). Switchers are not intended for moving trains over long distances but rather for assembling trains in order for another locomotive to take over. They do this in classification yards (Great Britain: ''marshalling yards''). Switchers may also make short transfer runs and even be the only motive power on branch lines and switching and terminal railroads. The term can also be used to describe the workers operating these engines or engaged in directing shunting operations. Switching locomotives may be purpose-built engines, but may also be downgraded main-line engines, or simply main-line engines assigned to switching. Switchers can also be used on short excursion train rides. The typical switcher is optimised for its job, being relatively low-powered but with a high ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Martin P Blomberg
Martin Petrus Frederik Blomberg (December 11, 1888 in Östervåla, Sweden — March 29, 1966 in Winter Park, Florida) was an American engineer of Swedish origin. He became well known for the development of the truck frame for the diesel-electric locomotives of the Electro Motive Division (EMD). Early life Blomberg grew up as a son of a teacher and minister. He graduated from the technical institute in Örebro, and in 1910 went to the university at Uppsala. In this time, he was very active and trained for the Olympic Games of 1912 in Sweden. However, he immigrated to Canada in the same year. From 1912 to 1914, he worked in Trois-Rivières, Quebec in a paper mill, and studied technical drawing and mechanical construction in an evening school. From 1915, he worked then National Steel Car Ltd Hamilton, Ontario. He later traveled for a year by canoeing 900 miles from the Albany River to the Hudson Bay. In 1916, he went to the US and enlisted with the US Army during World Wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
General Steel Industries
General Steel Industries, Inc. (GSI) was an American steel company founded as General Steel Castings Corporation in 1928. The company's first headquarters were in Eddystone, Pennsylvania and, prior to completing its own modern steel foundry in 1930, acquired the operations of the Commonwealth Steel Company, a critical supplier to the rail industry.''The Commonwealther'', August 1929 (Commonwealth Steel Company, 1929), p. 3 An acquisition program to diversify from its core steel castings business of manufacturing large steel castings was initiated in the late 1950s and resulted in six divisions and one subsidiary by 1971.General Steel Industries, Inc., 1971 Annual Report, p. 4 The broader business portfolio allowed GSI to close the Castings Division, the company's only business prior to diversification, in 1973. In 1974, GSI was operating 19 plants across the United States and internationallyGeneral Steel Industries, Inc., 1974 Annual Report, p. 2 and continued operating as an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leaf Springs
A leaf spring is a simple form of spring commonly used for the suspension in wheeled vehicles. Originally called a ''laminated'' or ''carriage spring'', and sometimes referred to as a semi-elliptical spring, elliptical spring, or cart spring, it is one of the oldest forms of vehicle suspension. A leaf spring is one or more narrow, arc-shaped, thin plates which are attached to the axle and chassis in a way that allows the leaf spring to flex vertically in response to irregularities in the road surface. Lateral leaf springs are the most commonly used arrangement, running the length of the vehicle and mounted perpendicular to the wheel axle, but numerous examples of transverse leaf springs exist as well. Leaf springs can serve multiple suspension functions: location, springing, and to some extent damping as well, through interleaf friction. However, this friction is not well controlled, resulting in stiction and irregular suspension motions. For this reason, some manufacturers have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coil Spring
A selection of conical coil springs The most common type of spring is the coil spring, which is made out of a long piece of metal that is wound around itself. Coil springs were in use in Roman times, evidence of this can be found in bronze Fibulae - the clasps worn by Roman soldiers among others. These are quite commonly found in Roman archeological digs. Coil springs can be either compression springs, tension springs or torsion springs, depending on how they are wound. A coil spring is a mechanical device which is typically used to store energy and subsequently release it, to absorb shock, or to maintain a force between contacting surfaces. They are made of an elastic material formed into the shape of a helix which returns to its natural length when unloaded. They are commonly used in mattresses, automotive suspensions, and residential plumbing. Coil springs come in a variety of sizes and shapes and can be used for a variety of applications. Small coil springs are often us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Damping Ratio
Damping is an influence within or upon an oscillatory system that has the effect of reducing or preventing its oscillation. In physical systems, damping is produced by processes that dissipate the energy stored in the oscillation. Examples include viscous drag (a liquid's viscosity can hinder an oscillatory system, causing it to slow down; see viscous damping) in mechanical systems, resistance in electronic oscillators, and absorption and scattering of light in optical oscillators. Damping not based on energy loss can be important in other oscillating systems such as those that occur in biological systems and bikes (ex. Suspension (mechanics)). Not to be confused with friction, which is a dissipative force acting on a system. Friction can cause or be a factor of damping. The damping ratio is a dimensionless measure describing how oscillations in a system decay after a disturbance. Many systems exhibit oscillatory behavior when they are disturbed from their position of sta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blomberg B
The Blomberg B is a 2-axle bogie that was introduced by EMD in 1939 with the FT locomotive series; the original "B" version plus later "M" and "X" versions were quite successful and became standard equipment on a multitude of locomotive models. They are easily identified by prominent "swing hangers" on each side which widen the effective spring base and provide a better ride. EMD literature refers to this truck as the "2 Axle Outside Swing Hanger;" informally it is named after EMD designer Martin Blomberg; this design evolved as an abbreviation of the preceding 3-axle design from the E-units; see filed on Jan 29, 1938 and granted on Feb 6, 1940. As of 2022 Blomberg B trucks are common sights under operating locomotives throughout North America. B version The "B" version is the original 1939 design. EMD Blomberg B trucks are seen on other makers' locomotives; this occasionally resulted when buyers of new GE locomotives preferred trade-in EMD trucks and/or motors, instead of GE ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bogie
A bogie ( ) (in some senses called a truck in North American English) is a chassis or framework that carries a wheelset, attached to a vehicle—a modular subassembly of wheels and axles. Bogies take various forms in various modes of transport. A bogie may remain normally attached (as on many railroad cars and semi-trailers) or be quickly detachable (as the dolly in a road train or in railway bogie exchange); it may contain a suspension within it (as most rail and trucking bogies do), or be solid and in turn be suspended (as most bogies of tracked vehicles are); it may be mounted on a swivel, as traditionally on a railway carriage or locomotive, additionally jointed and sprung (as in the landing gear of an airliner), or held in place by other means (centreless bogies). In Scotland, the term is used for a child’s (usually home-made) wooden cart. While ''bogie'' is the preferred spelling and first-listed variant in various dictionaries, bogey and bogy are also used. Rai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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