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T-34 Variants
The T-34 medium tank is one of the most-produced and longest-lived tanks of all time. Identification of T-34 variants can be complicated. Turret castings, superficial details, and equipment differed between factories; new features were added in the middle of production runs, or retrofitted to older tanks; damaged tanks were rebuilt, sometimes with the addition of newer-model equipment and even new turrets. Some tanks had appliqué armor made of scrap steel of varying thickness welded onto the hull and turret; these tanks are called ''s ekranami'' ("with screens"), although this was never an official designation for any T-34 variant. Model naming Since the break-up of the Soviet Union, newly declassified sources have demonstrated that all T-34s with the original turret and F-34 gun (conventionally known as Models 1941 and 1942) were officially called "Model 1941", and hexagonal-turret T-34 (Model 1943) was officially called "Model 1942". German military intelligence, intell ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
T-34
The T-34 is a Soviet medium tank from World War II. When introduced, its 76.2 mm (3 in) tank gun was more powerful than many of its contemporaries, and its 60-degree sloped armour provided good protection against Anti-tank warfare, anti-tank weapons. The T-34 had a profound effect on the conflict on the Eastern Front (World War II), Eastern Front, and had a long-lasting impact on tank design. The tank was praised by German generals when encountered during Operation Barbarossa, although its armour and armament were surpassed later in the war. Its main strength was its cost and production time, meaning that German panzer forces would often fight against Soviet tank forces several times their own size. The T-34 was also a critical part of the mechanized divisions that formed the backbone of the Deep operation, deep battle strategy. The T-34 was the mainstay of the Soviet Red Army armoured warfare, armoured forces throughout the war. Its general specifications remained n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gun Turret
A gun turret (or simply turret) is a mounting platform from which weapons can be fired that affords protection, visibility and ability to turn and aim. A modern gun turret is generally a rotatable weapon mount that houses the crew or mechanism of a projectile-firing weapon and at the same time lets the weapon be aimed and fired in some degree of azimuth and elevation (cone of fire). Description Rotating gun turrets protect the weapon and its crew as they rotate. When this meaning of the word "turret" started being used at the beginning of the 1860s, turrets were normally cylindrical. Barbettes were an alternative to turrets; with a barbette the protection was fixed, and the weapon and crew were on a rotating platform inside the barbette. In the 1890s, armoured hoods (also known as "gun houses") were added to barbettes; these rotated with the platform (hence the term "hooded barbette"). By the early 20th century, these hoods were known as turrets. Modern warships have gun-m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chelyabinsk
Chelyabinsk; , is the administrative center and largest types of inhabited localities in Russia, city of Chelyabinsk Oblast, Russia. It is the List of cities and towns in Russia by population, seventh-largest city in Russia, with a population of over 1.1 million people, and the second-largest city in the Ural Federal District, after Yekaterinburg. Chelyabinsk is located to the east behind the south part of the Ural Mountains and runs along the Miass (river), Miass River. The area of Chelyabinsk contained the ancient settlement of Arkaim, which belonged to the Sintashta culture. In 1736, a fortress by the name of Chelyaba was founded on the site of a Bashkirs, Bashkir village. Chelyabinsk was granted town status by 1787. Chelyabinsk began to grow rapidly by the early 20th century as a result of the construction of railway links from the European Russia, Russian core to Siberia, including the Trans-Siberian Railway. Its population reached 70,000 by 1917. Under the Soviet Union, C ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yekaterinburg
Yekaterinburg (, ; ), alternatively Romanization of Russian, romanized as Ekaterinburg and formerly known as Sverdlovsk ( ; 1924–1991), is a city and the administrative centre of Sverdlovsk Oblast and the Ural Federal District, Russia. The city is located on the Iset River between the Idel-Ural, Volga-Ural region and Siberia, with a population of roughly 1.5 million residents, up to 2.2 million residents in the urban agglomeration. Yekaterinburg is the list of cities and towns in Russia by population, fourth-largest city in Russia, the largest city in the Ural Federal District, and one of Russia's main cultural and industrial centres. Yekaterinburg has been dubbed the "Third capital of Russia", as it is ranked third by the size of its economy, culture, transportation and tourism. Yekaterinburg was founded on 18 November 1723 and named after the Orthodox name of Catherine I of Russia, Catherine I (born Marta Helena Skowrońska), the wife of Russian Emperor Peter the G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Uralmash
Uralmash is a heavy machine production business of the Russian engineering corporation OMZ. Its facility is located in Yekaterinburg, Russia, and it is reported to employ around 16,500 people. The surrounding residential area where workers live is also called Uralmash. Uralmash () is an abbreviation of , ''Ural’s’kiy Mashinostroitelnyy Zavod,'' literally ‘Urals Machine-Building Plant.' Historically, the plant was also called , ''Ural’s’kiy Zavod Tyazhelogo Mashinostroyeniya,'' ‘Ural Heavy Machinery Plant’ or , ''UZTM,'' and for a time carried the honorary name of Ordzhonikidze Ural Heavy Machinery Plant, after Grigoriy Ordzhonikidze. History The construction of the Ural Heavy Machinery Plant began in 1926, and in 1928 a special "" for its workers was also elected. The plant began operations in 1933 in compliance with the plans of the Government of the USSR for the industrialization of the country. During the pre-World War II period, Uralmash was dependent o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mickey Mouse
Mickey Mouse is an American cartoon character co-created in 1928 by Walt Disney and Ub Iwerks. The longtime icon and mascot of the Walt Disney Company, Mickey is an anthropomorphic mouse who typically wears red shorts, large shoes, and white gloves. He is often depicted with a Mickey Mouse universe, cast of characters including his girlfriend Minnie Mouse, his pet dog Pluto (Disney), Pluto, his best friends Donald Duck and Goofy, and his nemesis Pete (Disney), Pete. Mickey was created as a replacement for a prior Disney character, Oswald the Lucky Rabbit. The character was originally to be named "Mortimer Mouse", until Disney's wife, Lillian Disney, Lillian, suggested "Mickey". Mickey first appeared in two 1928 shorts ''Plane Crazy'' and ''The Gallopin' Gaucho'' (which were not picked up for distribution) before his public debut in ''Steamboat Willie'' (1928). The character went on to appear in over 130 films, mostly shorts as well as features such as ''Fantasia (1940 film) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
76 Mm Tank Gun M1940 F-34
The 76 mm tank gun M1940 F-34 (''76-мм танковая пушка обр. 1940 г. Ф-34'') was a 76.2 mm Soviet tank gun used on the T-34/76 tank. A modified version of the gun, the 76 mm tank gun M1941 ZiS-5 (''76-мм танковая пушка обр. 1941 г. ЗиС-5''), was used on KV-1 tanks during World War II. Nowadays, the two versions are often referred to just by their factory designations, as "F-34" and "ZiS-5", respectively. History The F-34 was designed before the start of World War II by P. Muraviev of Vasiliy Grabin's design bureau at Factory No. 92 in Gorky. The gun was superior to both contemporary 76.2 mm guns, Gorky's F-32 and the Leningrad Kirov Plant's L-11, but it was the latter that had already been approved for the new T-34 medium tank. The initial T-34 Model 1940 with L-11 was in production when Germany invaded the Soviet Union. The F-34 was ready for production, but Marshal Grigory Kulik's high-handed interference with tank ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
40–42
4 (four) is a number, numeral and digit. It is the natural number following 3 and preceding 5. It is a square number, the smallest semiprime and composite number, and is considered unlucky in many East Asian cultures. Evolution of the Hindu-Arabic digit Brahmic numerals represented 1, 2, and 3 with as many lines. 4 was simplified by joining its four lines into a cross that looks like the modern plus sign. The Shunga would add a horizontal line on top of the digit, and the Kshatrapa and Pallava evolved the digit to a point where the speed of writing was a secondary concern. The Arabs' 4 still had the early concept of the cross, but for the sake of efficiency, was made in one stroke by connecting the "western" end to the "northern" end; the "eastern" end was finished off with a curve. The Europeans dropped the finishing curve and gradually made the digit less cursive, ending up with a digit very close to the original Brahmin cross. While the shape of the character f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clutch
A clutch is a mechanical device that allows an output shaft to be disconnected from a rotating input shaft. The clutch's input shaft is typically attached to a motor, while the clutch's output shaft is connected to the mechanism that does the work. In a motor vehicle, the clutch acts as a mechanical linkage between the engine and transmission. By disengaging the clutch, the engine speed (RPM) is no longer determined by the speed of the driven wheels. Another example of clutch usage is in electric drills. The clutch's input shaft is driven by a motor and the output shaft is connected to the drill bit (via several intermediate components). The clutch allows the drill bit to either spin at the same speed as the motor (clutch engaged), spin at a lower speed than the motor (clutch slipping) or remain stationary while the motor is spinning (clutch disengaged). Types Dry clutch A ''dry clutch'' uses dry friction to transfer power from the input shaft to the output shaft, f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transmission (mechanics)
A transmission (also called a gearbox) is a mechanical device invented by Louis Renault (industrialist), Louis Renault (who founded Renault, Renault) which uses a gear set—two or more gears working together—to change the speed, direction of rotation, or torque multiplication/reduction in a machine. Transmissions can have a single fixed-gear ratio, multiple distinct gear ratios, or continuously variable ratios. Variable-ratio transmissions are used in all sorts of machinery, especially vehicles. Applications Early uses Early transmissions included the right-angle drives and other gearing in windmills, horse-powered devices, and steam engine, steam-powered devices. Applications of these devices included pumps, mill (grinding), mills and Hoist (device), hoists. Bicycles Bicycles traditionally have used hub gear or Derailleur gear transmissions, but there are other more recent design innovations. Automobiles Since the torque and Horsepower, power output of an interna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Petrol Engine
A petrol engine (gasoline engine in American and Canadian English) is an internal combustion engine designed to run on petrol (gasoline). Petrol engines can often be adapted to also run on fuels such as liquefied petroleum gas and ethanol blends (such as '' E10'' and '' E85''). They may be designed to run on petrol with a higher octane rating, as sold at petrol stations. Most petrol engines use spark ignition, unlike diesel engines which run on diesel fuel and typically use compression ignition. Another key difference to diesel engines is that petrol engines typically have a lower compression ratio. History The first practical petrol engine was built in 1876 in Germany by Nicolaus August Otto and Eugen Langen, although there had been earlier attempts by Étienne Lenoir in 1860, Siegfried Marcus in 1864 and George Brayton in 1873. Design Thermodynamic cycle Most petrol engines use either the four-stroke Otto cycle or the two-stroke cycle. Petrol engines have also ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mikulin M-17
The Mikulin M-17 was a Soviet-licensed copy of the German BMW VI V-12 liquid-cooled aircraft piston engine, further developed by Alexander Mikulin and used by Soviet aircraft and tanks during World War II. Production began in 1930 and continued until 1942. More than 27,000 were produced, of which 19,000 were aircraft engines while the rest were used in Soviet tanks of the period. Acquisition and production The Soviets had bought examples of BMW's III and IV engines earlier in the 1920s and bought two examples of the VI engine in 1926 for evaluation. Following successful bench trials of the engine the Soviets decided to purchase a license for it. A deal was concluded in October 1927 after prolonged negotiations. The Soviets paid $50,000 and were to pay 7.5% of the price of each engine produced after the first fifty. In exchange, the German company was to inform the Soviets of all changes to the engine for a period of five years. Soviet engineers and technicians were to be trai ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
