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Whitehead Alenia Sistemi Subaquei
Leonardo Sistemi di Difesa is an Italian defense company which is part of the Leonardo conglomerate. The company specializes in the manufacture of naval weapon systems. The plant based in Livorno came about when the Whitehead Torpedo Works was purchased by Giuseppe Orlando in 1924, one of the owners of the ''Cantiere navale fratelli Orlando'' of Livorno. Whitehead Torpedo established the ''Società Moto Fides'' that initially produced motorcycles but changed the production to that of torpedoes. History During the Second World War, Italy possessed three torpedo factories. These were the ''Silurificio Whitehead'' located in Fiume, the oldest torpedo factory in the world, founded 1875 as ''Torpedo-Fabrik von Robert Whitehead'' and renamed in 1924 after the Italian annexation; ''Silurificio Italiano'' located in Baia (present-day Bacoli), near Naples, a Whitehead subsidiary founded 1914 as ''Società Anonima Italiana Whitehead'', renamed 1915; and ''Silurificio Moto Fides'' (also know ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leonardo (company)
Leonardo S.p.A., formerly Leonardo-Finmeccanica and originally Finmeccanica, is an Italian Multinational corporation, multinational company specialising in Aerospace manufacturer, aerospace, arms industry, defence and Information security, security. Headquartered in Rome, the company has 180 sites worldwide. It is the 12th largest List of defense contractors, defence contractor in the world based on 2020 revenues.Top 100 Arms-Producing and Military Service Companies SIPRI. Received 2019-12-18. The company is partially owned by the Italian government, which holds 30.2% of the company's shares and is its largest shareholder. On 1 January 2016, Leonardo-Finmeccanica became a single industrial company by int ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
G7e Torpedo
The G7e torpedo was the standard electric torpedo used by the German ''Kriegsmarine'' submarines in World War II. It came in 20 different versions, with the initial model G7e(TII) in service at the outbreak of the war. Due to several problems, leading to the German "''Torpedokrise''" which lasted until the end of 1941, the improved G7e(TIII) took over as the standard electric torpedo used by German U-boats for the rest of the war. G7e torpedoes measured in diameter and about in length. Depending on the type, the warhead contained a main charge of of '' Schießwolle 36'', a mixture of dipicrylamine and TNT. All were powered by electric motors and lead-acid batteries which required onboard maintenance to maintain their functionality. Other major G7e-versions that saw operational service during the war, were the first acoustic homing torpedo G7es(TIV) ''Falke'' and its improved successor G7es(TV) ''Zaunkönig''. G7e(TII) The G7e(TII) went in service with German U-boat fleets ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mark 44 Torpedo
The Mark 44 torpedo is a now-obsolete air-launched and ship-launched lightweight torpedo manufactured in the United States, and under licence in Canada, France, Italy, Japan and the United Kingdom, with 10,500 being produced for U.S. service. It was superseded by the Mark 46 torpedo, beginning in the late 1960s. The Royal Australian Navy, however, continued to use it alongside its successor for a number of years, because the Mark 44 was thought to have superior performance in certain shallow-water conditions. It has been deployed by many navies and air forces including the USN, Royal Navy, Royal Australian Navy and the Royal Air Force from various launch vehicles. These include long-range maritime patrol aircraft, e.g. P-3 Orion, RAF Nimrod, Canadair Argus, LAMPS and other embarked naval helicopters, ASROC missiles, Ikara missiles. Development During the 1950s the US Navy ordered development of a new generation of lightweight anti-submarine torpedoes. Two programs were s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anti-surface Warfare
Anti-surface warfare (ASuW or ASUW) is the branch of naval warfare concerned with the suppression of surface combatants. More generally, it is any weapons, sensors, or operations intended to attack or limit the effectiveness of an adversary's surface ships. Before the adoption of the submarine and naval aviation, all naval warfare consisted of anti-surface warfare. The distinct concept of an anti-surface warfare capability emerged after World War II, and literature on the subject as a distinct discipline is inherently dominated by the dynamics of the Cold War. Categories of anti-surface warfare Anti-surface warfare can be divided into four categories based on the platform from which weapons are launched: * Air (or aviation): Anti-surface warfare conducted by aircraft. Historically, this was conducted primarily through level- or dive-bombing, strafing runs or air-launching torpedoes (and in some cases by suicide attacks). Today, air ASuW is generally conducted by stand-off ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toti-class Submarine
The ''Toti'' class were submarines built for the Marina Militare, Italian Navy in the 1960s. They were the first submarines designed and built in Italy since World War II. These boats were small and designed as "hunter killer" anti-submarine submarines. They are comparable to the German Type 205 submarines and the French s. Ships All four ships were built by Fincantieri, Italcantieri (Fincantieri) to Monfalcone (Gorizia) shipyard. References Further reading * * * External links S506 Enrico Toti (Enrico Toti Class)*– Official Site for the Enrico Toti submarine museum, Milan Submarine classes Toti-class submarines, Ships built by Fincantieri {{submarine-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Contra-rotating
Contra-rotating, also referred to as coaxial contra-rotating, is a technique whereby parts of a mechanism rotate in opposite directions about a common axis, usually to minimise the effect of torque. Examples include some aircraft propellers, resulting in the maximum power of a single piston or turboprop engine to drive two propellers in opposite rotation. Contra-rotating propellers are also common in some marine transmission systems, in particular for large speed boats with planing hulls. Two propellers are arranged one behind the other, and power is transferred from the engine via planetary gear transmission. The configuration can also be used in helicopter designs termed coaxial rotors, where similar issues and principles of torque apply. Contra-rotating propellers should not be confused with counter-rotating propellers, a term which describes propellers rotating in opposite directions but sitting apart from each other on separate shafts instead of sharing a common axis. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Centauro-class Frigate
The ''Centauro'' class consisted of four frigates built for the Italian Navy during the 1950s. They entered service in 1957, with the last one being stricken in 1985. Design and description The ''Centauro''-class ships measured long overall, with a beam of and a draft of . Their crew numbered 207 officers and enlisted men. They displaced at standard load and at deep load.Blackman, p. 200 The ships had two Tosi geared steam turbines, each driving one propeller shaft using steam provided by two Foster Wheeler water-tube boilers. The turbines were rated at a total of for a speed of . The ''Centauro''s had a range of at .Lyon & Friedman, p. 208 The main armament of the ''Centauro''-class ships consisted of four OTO Melara Allargato dual-purpose (DP) guns in two twin-gun mounts, one each fore and aft of the superstructure. The guns were positioned over-and-under in the mount and were protected against spray by a gun shield. Four Bofors AA guns in twin mounts were positio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
High-test Peroxide
High-test peroxide (HTP) is a highly concentrated (85 to 98%) solution of hydrogen peroxide, with the remainder consisting predominantly of water. In contact with a catalyst, it decomposes into a high-temperature mixture of steam and oxygen, with no remaining liquid water. It was used as a propellant of HTP rockets and torpedoes, and has been used for high-performance vernier engines. Properties Hydrogen peroxide works best as a propellant in extremely high concentrations (roughly over 70%). Although any concentration of peroxide will generate some hot gas (oxygen plus some steam), at concentrations above approximately 67%, the heat of decomposing hydrogen peroxide becomes large enough to completely vaporize all the liquid at standard pressure. This represents a safety and utilization turning point, since decomposition of any concentration above this amount is capable of transforming the liquid entirely to heated gas (the higher the concentration, the hotter the resulting gas). Thi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Multiplexing
In telecommunications and computer networking, multiplexing (sometimes contracted to muxing) is a method by which multiple analog or digital signals are combined into one signal over a shared medium. The aim is to share a scarce resource—a physical transmission medium. For example, in telecommunications, several telephone calls may be carried using one wire. Multiplexing originated in telegraphy in the 1870s, and is now widely applied in communications. In telephony, George Owen Squier is credited with the development of telephone carrier multiplexing in 1910. The multiplexed signal is transmitted over a communication channel such as a cable. The multiplexing divides the capacity of the communication channel into several logical channels, one for each message signal or data stream to be transferred. A reverse process, known as demultiplexing, extracts the original channels on the receiver end. A device that performs the multiplexing is called a multiplexer (MUX), and a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Impedance Matching
In electrical engineering, impedance matching is the practice of designing or adjusting the input impedance or output impedance of an electrical device for a desired value. Often, the desired value is selected to maximize power transfer or minimize signal reflection. For example, impedance matching typically is used to improve power transfer from a radio transmitter via the interconnecting transmission line to the antenna. Signals on a transmission line will be transmitted without reflections if the transmission line is terminated with a matching impedance. Techniques of impedance matching include transformers, adjustable networks of lumped resistance, capacitance and inductance, or properly proportioned transmission lines. Practical impedance-matching devices will generally provide best results over a specified frequency band. The concept of impedance matching is widespread in electrical engineering, but is relevant in other applications in which a form of energy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pirelli
Pirelli & C. S.p.A. is an Italian multinational tyre manufacturer based in the city of Milan, Italy. The company, which has been listed on the Borsa Italiana since 1922, is the 5th-largest tyre manufacturer, and is focused on the consumer production of tyres for cars, motorcycles and bicycles. It is present in Europe, the Asia-Pacific, Latin America, North America, and the post-Soviet states, operating commercially in over 160 countries. It has 19 manufacturing sites, across 13 countries, and a network of around 14,600 distributors and retailers. In 2015, China National Chemical Corp. Ltd. ( ChemChina) took controlling interest of Pirelli; with the Chinese state-owned company agreeing to maintain the tyre company's ownership structure until 2023. Pirelli has been sponsoring sport competitions since 1907 and is the exclusive tyre partner and supplier for the Grand-Am Rolex Sports Car Series for 2008–2010, FIA Formula One World Championship for 2011–present and for the FI ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
