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Scud-B
The R-17 Elbrus, GRAU index 9K72 is a tactical ballistic missile, initially developed by the Soviet Union. It is also known by its NATO reporting name SS-1C Scud-B. It is one of several Soviet missiles to carry the reporting name Scud; the most prolifically launched of the series, with a production run estimated at 7,000 (1960–1987). Also designated R-300 during the 1970s, the R-17 was derived from the R-11 Zemlya. It has been operated by 32 countries and manufactured in four countries outside the Soviet Union. It is still in service with some. It's been called the Hwasong-5 in North Korea. History The first mock-up was designed and built by Makeyev in 1958–1959, before the programme was transferred to the Votkinsk Machine Building Plant in 1959 for mass production. The first launch was conducted in 1961, and it entered service in 1964. Design The R-17 featured important improvements over the R-11. The Isayev RD-21 engine used a combination of inhibited red fuming nitric ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scud
A Scud missile is one of a series of tactical ballistic missiles developed by the Soviet Union during the Cold War. It was exported widely to both Second World, Second and Third World, Third World countries. The term comes from the NATO reporting name attached to the missile by Western intelligence agencies. The Russian names for the missile are the R-11 (the first version), and the R-17 (later R-300) Elbrus (later developments). The name Scud has been widely used to refer to these missiles and the wide variety of derivative variants developed in other countries based on the Soviet design. Scud missiles have been used in combat since the 1970s, mostly in wars in the Middle East. They became familiar to the Western public during the 1991 Persian Gulf War, when Ba'athist Iraq, Iraq fired dozens at Israel and Saudi Arabia. In Russian service it is being replaced by the 9K720 Iskander. Development The first use of the term ''Scud'' was in the NATO name SS-1b Scud-A, applied to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2020 Nagorno-Karabakh Conflict
The Second Nagorno-Karabakh War was an armed conflict in 2020 that took place in the disputed region of Nagorno-Karabakh and Armenian-occupied territories surrounding Nagorno-Karabakh, the surrounding territories. It was a major escalation of an unresolved Nagorno-Karabakh conflict, conflict over the region, involving Azerbaijan, Armenia and the Political status of Nagorno-Karabakh, self-declared Armenian breakaway state of Republic of Artsakh, Artsakh. The war lasted for more than a month and resulted in Azerbaijani victory, with Armenia ceding the Armenian-occupied territories surrounding Nagorno-Karabakh, territories it had occupied in 1994 surrounding Nagorno-Karabakh. The defeat ignited 2020–2021 Armenian protests, anti-government protests in Armenia. Post-war skirmishes continued in the region, including September 2022 Armenia–Azerbaijan clashes, substantial clashes in 2022. Fighting began on the morning of 27 September, with an Azerbaijani offensive along the Nagorn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tactical Ballistic Missile
A tactical ballistic missile (TBM), or battlefield range ballistic missile (BRBM), is a ballistic missile designed for short-range battlefield use. Typically, range (aeronautics), range is less than . Tactical ballistic missiles are usually mobile to ensure survivability and quick deployment, as well as carrying a variety of warheads to target enemy facilities, assembly areas, artillery, and other targets behind the front lines. Warheads can include conventional high explosive, Chemical warfare, chemical, Biological warfare, biological, or nuclear warheads. Typically tactical nuclear weapons are limited in their total yield compared to strategic rockets. Design Tactical ballistic missiles fill the gap between conventional rocket artillery and longer-range short-range ballistic missiles. Tactical missiles can carry heavy payloads deep behind enemy lines in comparison to rockets or gun artillery, while having better mobility and less expense than the more strategic theatre mi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red Fuming Nitric Acid
Red fuming nitric acid (RFNA) is a storable oxidizer used as a rocket propellant. It consists of 84% nitric acid (), 13% dinitrogen tetroxide and 1–2% water. The color of red fuming nitric acid is due to the dinitrogen tetroxide, which breaks down partially to form nitrogen dioxide. The nitrogen dioxide dissolves until the liquid is saturated, and produces toxic fumes with a suffocating odor. RFNA increases the flammability of combustible materials and is highly exothermic when reacting with water. It is usually used with an inhibitor (with various, sometimes secret, substances, including hydrogen fluoride; any such combination is called ''inhibited RFNA'', ''IRFNA'') because nitric acid attacks most container materials. Hydrogen fluoride for instance will passivate the container metal with a thin layer of metal fluoride, making it nearly impervious to the nitric acid. It can also be a component of a monopropellant; with substances like amine nitrates dissolved in it, it can ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aleksei Mihailovich Isaev
Aleksei Mikhailovich Isaev (also Isayev; Russian: Алексе́й Миха́йлович Иса́ев; October 24, 1908, in Saint Petersburg – June 10, 1971, in Moscow) was a Russian rocket engineer. Aleksei Isaev began work under Leonid Dushkin during World War II, on an experimental rocket-powered interceptor plane, the BI-1. In 1944 he formed his own design bureau to engineer liquid-propellant engines. After abandoning the heavy, complex and undercooled German engine designs, Russia's principal engine designer Valentin Glushko turned to Isaev's innovations: thin-walled copper combustion chambers backed by steel support, anti-oscillation baffle to prevent chugging, and the flat injector plate with mixing-swirling injectors. The latter was an enormous simplification of the "plumbing nightmare" of the V-2 engine, because it avoided the need for separate fuel lines to each sprayer. Staged combustion (Замкнутая схема) was first proposed by Alexey Isaev in 194 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poznań
Poznań () is a city on the River Warta in west-central Poland, within the Greater Poland region. The city is an important cultural and business centre, and one of Poland's most populous regions with many regional customs such as Saint John's Fair (''Jarmark Świętojański''), traditional Saint Martin's croissants and a local dialect. Among its most important heritage sites are the Renaissance Old Town, Town Hall and Gothic Cathedral. Poznań is the fifth-largest and one of the oldest cities in Poland. As of 2021, the city's population is 529,410, while the Poznań metropolitan area (''Metropolia Poznań'') comprising Poznań County and several other communities is inhabited by over 1.1 million people. It is one of four historical capitals of medieval Poland and the ancient capital of the Greater Poland region, currently the administrative capital of the province called Greater Poland Voivodeship. Poznań is a center of trade, sports, education, technology and touri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Votkinsk Machine Building Plant
JSC Votkinsk Machine Building Plant (russian: Воткинский завод) is a machine and ballistic missile production enterprise based in Votkinsk, Republic of Udmurtia, Russia. Its production includes the RS-24 Yars intercontinental ballistic missile, Russia's most recent ICBM development, as well as the submarine-launched Bulava SLBM. Incorporated as a Federal State Unitary Enterprise until 2010, it is now an open joint-stock company. The company has two separate facilities: a final assembly plant located some 12 kilometers outside of Votkinsk where missiles are assembled, and the main plant, located in downtown Votkinsk, where missile components as well as civil and consumer goods are produced. History The plant from its foundation until 1917 The idea of constructing a plant first arose in connection with the depletion of forests near then existing mining enterprises in the Urals (mid-18th century). Most firewood had to be brought from immense distances that natu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxidiser
An oxidizing agent (also known as an oxidant, oxidizer, electron recipient, or electron acceptor) is a substance in a redox chemical reaction that gains or " accepts"/"receives" an electron from a (called the , , or ). In other words, an oxidizer is any substance that oxidizes another substance. The oxidation state, which describes the degree of loss of electrons, of the oxidizer decreases while that of the reductant increases; this is expressed by saying that oxidizers "undergo reduction" and "are reduced" while reducers "undergo oxidation" and "are oxidized". Common oxidizing agents are oxygen, hydrogen peroxide and the halogens. In one sense, an oxidizing agent is a chemical species that undergoes a chemical reaction in which it gains one or more electrons. In that sense, it is one component in an oxidation–reduction (redox) reaction. In the second sense, an oxidizing agent is a chemical species that transfers electronegative atoms, usually oxygen, to a substrate. Combus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unsymmetrical Dimethylhydrazine
Unsymmetrical dimethylhydrazine (UDMH; 1,1-dimethylhydrazine, НДМГ or codenamed Geptil) is a chemical compound with the formula H2NN(CH3)2 that is used as a rocket propellant. It is a colorless liquid, with a sharp, fishy, ammonia-like smell typical for organic amines. Samples turn yellowish on exposure to air and absorb oxygen and carbon dioxide. It is miscible with water, ethanol, and kerosene. In concentration between 2.5% and 95% in air, its vapors are flammable. It is not sensitive to shock. Symmetrical dimethylhydrazine, 1,2-dimethylhydrazine is also known but is not as useful. Production UDMH is produced industrially by two routes. Based on the Olin Raschig process, one method involves reaction of monochloramine with dimethylamine giving 1,1-dimethylhydrazinium chloride: :(CH3)2NH + NH2Cl → (CH3)2NNH2 ⋅ HCl In the presence of suitable catalysts, acetylhydrazine can be N-dimethylated using formaldehyde and hydrogen to give the N,N-dimethyl-N'-acetylhydrazine, w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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