Praga RN
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Praga RN
The Praga RN ( cs, links=no, Rychlý Nákladní, lit=Fast Freight, italic=yes) was a medium-sized truck manufactured by Praga from 1933. The vehicle was powered by a six-cylinder petrol engine. From 1934, the diesel-powered version Praga RND ( cs, links=no, Rychlý Nákladní Diesel, lit=Fast Freight Diesel, italic=yes) was also manufactured. The trucks were manufactured for nearly three decades and became one of the most widely used freight wagons in Czechoslovakia, the chassis being used for buses and fire engines as well as for military uses. RN production ended in 1953 and RND in 1955, although production continued in Yugoslavia until 1962. In total, around 40,000 Praga RN and RND were produced, including about 3,700 buses, as well as 18,300 RN license built in Yugoslavia. History Praga launched the RN in 1933 as a traditional medium-weight truck with rigid axles and a sheet metal cab wrapped around a wooden skeleton and mounted on a ladder frame. Initial production was 94 ve ...
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Czechoslovak Army
The Czechoslovak Army (Czech and Slovak: Československá armáda) was the name of the armed forces of Czechoslovakia. It was established in 1918 following Czechoslovakia's declaration of independence from Austria-Hungary. History In the first months of the World War I, the response of the Czech soldiers and civilians to the war and mobilisation efforts were highly enthusiastic, however it turned into apathy later. Although modeled after Austro-Hungarian Army patterns, the army of the newly established state also incorporated former members of the Czechoslovak Legion fighting alongside the Entente during World War I. Czechoslovak Army took part in the brief Polish-Czechoslovak War in which Czechoslovakia annexed the Zaolzie region from Poland. In the interbellum the force was fairly modern by contemporary standards, with the core of the force formed by LT vz. 38 and LT vz. 35 tanks, as well as an extensive system of border fortifications. Mobilised during the Munich Confe ...
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Industrija Motora Rakovica
Industrija Motora Rakovica ( sr-cyr, Индустрија Мотора Раковица; abbr. IMR) was an agricultural machinery manufacturer based in Rakovica, Belgrade, Serbia, formerly Yugoslavia. Originally founded in 1927 as Zadrugar, they build tractors and engines. The engines are based on originally licensed Perkins engine models. Some of the tractors were based on Landini and Massey Ferguson models, originally licensed. In 2009, IMR formed a partnership or joint venture with IMT, also of Serbia. In 2011, IMR began sending CKD tractors to Ethiopia Ethiopia, , om, Itiyoophiyaa, so, Itoobiya, ti, ኢትዮጵያ, Ítiyop'iya, aa, Itiyoppiya officially the Federal Democratic Republic of Ethiopia, is a landlocked country in the Horn of Africa. It shares borders with Eritrea to the ... for assembly. They are also sold in Egypt as EAMCO tractors. IMR shut down in 2015 along with IMT but with no plans for bringing it back. Rakovica model names indicate their ...
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Kingdom Of Yugoslavia
The Kingdom of Yugoslavia ( sh-Latn-Cyrl, separator=" / ", Kraljevina Jugoslavija, Краљевина Југославија; sl, Kraljevina Jugoslavija) was a state in Southeast Europe, Southeast and Central Europe that existed from 1918 until 1941. From 1918 to 1929, it was officially called the Kingdom of Serbs, Croats and Slovenes ( sh-Latn-Cyrl, separator=" / ", Kraljevina Srba, Hrvata i Slovenaca, Краљевина Срба, Хрвата и Словенаца; sl, Kraljevina Srbov, Hrvatov in Slovencev), but the term "Yugoslavia" (literally "Land of South Slavs") was its colloquial name due to its origins."Kraljevina Jugoslavija! Novi naziv naše države. No, mi smo itak med seboj vedno dejali Jugoslavija, četudi je bilo na vseh uradnih listih Kraljevina Srbov, Hrvatov in Slovencev. In tudi drugi narodi, kakor Nemci in Francozi, so pisali že prej v svojih listih mnogo o Jugoslaviji. 3. oktobra, ko je kralj Aleksander podpisal "Zakon o nazivu in razdelitvi kraljevine n ...
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Leaf Spring
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 ...
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Drum Brake
A drum brake is a brake that uses friction caused by a set of shoes or pads that press outward against a rotating cylinder-shaped part called a brake drum. The term ''drum brake'' usually means a brake in which shoes press on the inner surface of the drum. When shoes press on the outside of the drum, it is usually called a '' clasp brake''. Where the drum is pinched between two shoes, similar to a conventional disc brake, it is sometimes called a ''pinch drum brake'', though such brakes are relatively rare. A related type called a band brake uses a flexible belt or "band" wrapping around the outside of a drum. History The modern automobile drum brake was first used in a car made by Maybach in 1900, although the principle was only later patented in 1902 by Louis Renault. He used woven asbestos lining for the drum brake lining, as no alternative dissipated heat like the asbestos lining, though Maybach had used a less sophisticated drum brake. In the first drum brakes, levers a ...
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Universal Joint
A universal joint (also called a universal coupling or U-joint) is a joint or coupling connecting rigid shafts whose axes are inclined to each other. It is commonly used in shafts that transmit rotary motion. It consists of a pair of hinges located close together, oriented at 90° to each other, connected by a cross shaft. The universal joint is not a constant-velocity joint. U-joints are also sometimes called by various eponymous names, as follows: * Cardan joint, after Gerolamo Cardano, a polymath of the 16th century who contributed to knowledge of various clever mechanisms, including gimbals * Hooke joint or Hooke's joint, after Robert Hooke, a polymath of the 17th century who contributed to knowledge of various clever mechanisms * Spicer joint, after Clarence W. Spicer and the Spicer Manufacturing Company, who manufactured U joints * Hardy Spicer joint, after the Hardy Spicer brand, a successor to the Spicer brand History The main concept of the universal joint is ...
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Manual Transmission
A manual transmission (MT), also known as manual gearbox, standard transmission (in Canada, the United Kingdom, and the United States), or stick shift (in the United States), is a multi-speed motor vehicle transmission (mechanics), transmission system, where gear changes require the driver to manually select the gears by operating a gear stick and clutch (which is usually a foot pedal for cars or a hand lever for motorcycles). Early automobiles used ''sliding-mesh'' manual transmissions with up to three forward gear ratios. Since the 1950s, ''constant-mesh'' manual transmissions have become increasingly commonplace and the number of forward ratios has increased to 5-speed and 6-speed manual transmissions for current vehicles. The alternative to a manual transmission is an automatic transmission; common types of automatic transmissions are the Automatic transmission#Hydraulic automatic transmissions, hydraulic automatic transmission (AT), and the continuously variable transmissio ...
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Robert Bosch GmbH
Robert Bosch GmbH (; ), commonly known as Bosch and stylized as BOSCH, is a German multinational engineering and technology company headquartered in Gerlingen, Germany. The company was founded by Robert Bosch in Stuttgart in 1886. Bosch is 92% owned by Robert Bosch Stiftung, a charitable institution. Although the charity is funded by owning the vast majority of shares, it has no voting rights and is involved in health and social causes unrelated to Bosch’s business. Bosch's core operating areas are spread across four business sectors: mobility (hardware and software), consumer goods (including household appliances and power tools), industrial technology (including drive and control) and energy and building technology. History 1886–1920 The company started in a backyard in Stuttgart-West as the ''Werkstätte für Feinmechanik und Elektrotechnik'' (''Workshop for Precision Mechanics and Electrical Engineering'') on 15 November 1886. The next year Bosch presented a low v ...
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Overhead Valve Engine
An overhead valve (OHV) engine, sometimes called a ''pushrod engine'', is a piston engine whose valves are located in the cylinder head above the combustion chamber. This contrasts with earlier flathead engines, where the valves were located below the combustion chamber in the engine block. Although an overhead camshaft (OHC) engine also has overhead valves, the common usage of the term "overhead valve engine" is limited to engines where the camshaft is located in the engine block. In these traditional OHV engines, the motion of the camshaft is transferred using pushrods (hence the term "pushrod engine") and rocker arms to operate the valves at the top of the engine. Some early intake-over-exhaust engines used a hybrid design combining elements of both side-valves and overhead valves. History Predecessors The first internal combustion engines were based on steam engines and therefore used slide valves. This was the case for the first Otto engine, which was first succe ...
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Carburetor
A carburetor (also spelled carburettor) is a device used by an internal combustion engine to control and mix air and fuel entering the engine. The primary method of adding fuel to the intake air is through the venturi tube in the main metering circuit, however various other components are also used to provide extra fuel or air in specific circumstances. Since the 1990s, carburetors have been largely replaced by fuel injection for cars and trucks, however carburetors are still used by some small engines (e.g. lawnmowers, generators and concrete mixers) and motorcycles. Diesel engines have always used fuel injection instead of carburetors. Etymology The name "carburetor" is derived from the verb ''carburet'', which means "to combine with carbon," or in particular, "to enrich a gas by combining it with carbon or hydrocarbons." Thus a carburetor mixes intake air with hydrocarbon-based fuel, such as petrol or autogas (LPG). The name is spelled "carburetor" in American English ...
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