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Chinese Destroyer Shijiazhuang
''Shijiazhuang'' (116) is the second ship of Type 051C destroyer of the People's Liberation Army Navy. She was commissioned on 22 January 2007. Development and design The Type 051C destroyers were constructed at Dalian Shipyard and was revealed in 2004. They uses the advanced Russian S-300FM air defence missile system with track-via-missile homing guided by a single Tombstone radar. The missile has a maximum range of 150 km and an operating altitude of 10 m - 27 km. The anti-ship abilities possessed by the ''Luzhou'' class includes 8 indigenous YJ-83 (C-803) Anti-ship missiles. This anti-ship missile has a range of 150+ km and approaches its target in sea skimming mode at a speed of Mach 1.5. As a secondary role, the missile can also be used against land targets. The ship uses two Type 730 CIWS guns for air defence. The Type 730 is a highly effective CIWS that is also installed on the Type 052B (''Guangzhou'' class) and Type 052C/052D destroyers, and the Type ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shijiazhuang
Shijiazhuang; Mandarin: ; formerly known as Shimen and romanized as Shihkiachwang is the capital and most populous city of China's Hebei Province. A prefecture-level city southwest of Beijing, it administers eight districts, three county-level cities and eleven counties, and is east of the Taihang Mountains, which extend over from north to south with an average elevation of . At the 2020 census, the city had a population of 11,235,086, with 6,230,709 in the built-up area comprising all urban districts except Jingxing District and Zhengding County, the twelfth largest in mainland China. Shijiazhuang experienced dramatic growth after the founding of the People's Republic of China in 1949. The population of the metropolitan area has more than quadrupled in thirty years as a result of industrialization and infrastructural developments. From 2008 to 2011, Shijiazhuang implemented a three-year plan, resulting in an increase of green areas and new buildings and roads. A railway ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ka-27
The Kamov Ka-27 (NATO reporting name 'Helix') is a military helicopter developed for the Soviet Navy, and as of 2024 is in service in various countries including Russia, Ukraine, Vietnam, China, South Korea, and India. Variants include the Ka-29 assault transport, the Ka-28 downgraded export version, and the Ka-32 for civilian use. Design and development The helicopter was developed for ferrying and anti-submarine warfare. Design work began in 1969 and the first prototype flew in 1973. It was intended to replace the decade-old Kamov Ka-25, and had to have identical or smaller external dimensions than its predecessor. Like other Kamov military helicopters it has coaxial rotors, removing the need for a tail rotor. In total, five prototypes and pre-series helicopters were built. Series production started at Kumertau in July 1979, and the new helicopter officially entered service with the Soviet Navy in April 1981. The Ka-27 has a crew of three with a pilot and navigator both st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2005 Ships
5 (five) is a number, numeral and digit. It is the natural number, and cardinal number, following 4 and preceding 6, and is a prime number. Humans, and many other animals, have 5 digits on their limbs. Mathematics 5 is a Fermat prime, a Mersenne prime exponent, as well as a Fibonacci number. 5 is the first congruent number, as well as the length of the hypotenuse of the smallest integer-sided right triangle, making part of the smallest Pythagorean triple ( 3, 4, 5). 5 is the first safe prime and the first good prime. 11 forms the first pair of sexy primes with 5. 5 is the second Fermat prime, of a total of five known Fermat primes. 5 is also the first of three known Wilson primes (5, 13, 563). Geometry A shape with five sides is called a pentagon. The pentagon is the first regular polygon that does not tile the plane with copies of itself. It is the largest face any of the five regular three-dimensional regular Platonic solid can have. A conic is determine ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vladivostok
Vladivostok ( ; , ) is the largest city and the administrative center of Primorsky Krai and the capital of the Far Eastern Federal District of Russia. It is located around the Zolotoy Rog, Golden Horn Bay on the Sea of Japan, covering an area of , with a population of 603,519 residents Vladivostok is the second-largest city in the Far Eastern Federal District, as well as the Russian Far East, after Khabarovsk. It is located approximately from the China–Russia border and from the North Korea–Russia border. What is now Vladivostok was part of Outer Manchuria. Shortly after the signing of the Treaty of Aigun between Qing China and the Russian Empire and affirmed by the Convention of Peking – from which it is also known as the Amur Annexation – the city was founded as a Russian military outpost on July 2, 1860. In 1872, the main Russian naval base on the Pacific Ocean was transferred to the city, stimulating its growth. In 1914 the city experienced rapid growth economical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South China Sea
The South China Sea is a marginal sea of the Western Pacific Ocean. It is bounded in the north by South China, in the west by the Indochinese Peninsula, in the east by the islands of Taiwan island, Taiwan and northwestern Philippines (mainly Luzon, Mindoro and Palawan Island, Palawan), and in the south by Borneo, eastern Sumatra and the Bangka Belitung Islands, encompassing an area of around . It communicates with the East China Sea via the Taiwan Strait, the Philippine Sea via the Luzon Strait, the Sulu Sea via the straits around Palawan, the Java Sea via the Karimata Strait, Karimata and Bangka Straits and directly with Gulf of Thailand. The Gulf of Tonkin is part of the South China Sea. $3.4 trillion of the world's $16 trillion Maritime transport, maritime shipping passed through South China Sea in 2016. Oil and natural gas reserves have been found in the area. The Western Central Pacific accounted for 14% of world's commercial fishing in 2010. The South China Sea Islands, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
French 100 Mm Naval Gun
Modern French 100 mm naval guns are multipurpose artillery pieces, capable of a high rate of fire, against both aerial and surface targets. Most modern French warships are or were equipped with one of its variants. History At the end of the Second World War, the French Navy was equipped with guns of numerous calibres, most of which were obsolete. In 1953, the STCAN of Paris, under engineer Tonnelé, drafted the design of a multi-purpose 100 mm gun. The gun was designed to be effective for anti-aircraft defence, anti-ship combat, and shore bombardment fire support. The first model of the family, "modèle 53", was tested at sea on the escort ''Le Brestois'' in 1958 and the escort aviso ''Victor Schoelcher'' in 1961. Description The most common version, ''modèle 68'', features a completely automatic action and control. The ammunition is stored in a magazine underneath the turret, and fed to the gun by a lift operated by a team of two. A flexible pipe allows feeding the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type 054A Frigate
The Type 054A (NATO/ OSD Jiangkai II) is a Ship class, class of guided-missile frigate from the People's Republic of China. It is a development of the Type 054 frigate; compared to its predecessor, the Type 054A has medium-range air defense capability in the form of Type 382 radar and Vertical launching system, vertically launched (VLS) HQ-16, HHQ-16 surface-to-air missiles.Schwartz (2015): page 28 The first ship (''Xuzhou'') of the new Type 054A was laid down in 2005 and entered service with the People's Liberation Army Navy (PLAN) in January 2008;''Jane's Fighting Ships'' (2015): page 144 the class was a key component of the PLAN's surface fleet by the late 2010s.Willett (2019): page 24Willett (2019): page 26 Production was ongoing in 2023, with 30 ships in service by mid 2019, while the next batch of 10 ships commissioned from 2022 onwards, and a final batch of 10 ships under development, although this last batch may be built to the follow-on Type 054B frigate, Type 054B (''Ji ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guangzhou Class Destroyer
The Type 052B (NATO/ OSD Luyang I-class destroyer) is a class of guided-missile destroyers in the Chinese People's Liberation Army Navy Surface Force (PLAN). The Type 052B was China's first modern destroyer designKirchberger (2015): page 195McDevitt (2017): page 57 and the first Chinese design to incorporate true medium-range air defence capability in the form of Russian Shtil-1 (improved navalized Buk, NATO designation SA-N-12) surface-to-air missiles (SAM).Schwartz (2015): page 26 Two ships - ''Guangzhou'' and ''Wuhan Wuhan; is the capital of Hubei, China. With a population of over eleven million, it is the most populous city in Hubei and the List of cities in China by population, eighth-most-populous city in China. It is also one of the nine National cent ...'' - were begun in 2001 and commissioned in July and December 2004 respectively. Programme In the early 2000's, China pursued multiple - and sometimes concurrent - programmes to acquire modern destroyers, purcha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CIWS
A close-in weapon system (CIWS ) is a point-defense weapon system for detecting and destroying short-range incoming missiles and enemy aircraft which have penetrated the outer defenses, typically mounted on a naval ship. Nearly all classes of larger modern warships are equipped with some kind of CIWS device. There are two types of CIWS systems. A gun-based CIWS usually consists of a combination of radars, computers, and rapid-firing multiple-barrel rotary cannons placed on a rotating turret. Missile-based CIWSs use either infra-red, passive radar/ ESM, or semi-active radar terminal guidance to guide missiles to the targeted enemy aircraft or other threats. In some cases, CIWS are used on land to protect military bases. In this case, the CIWS can also protect the base from shell and rocket fire. Gun systems A gun-based CIWS usually consists of a combination of radars, computers and rotary or revolver cannon placed on a rotating, automatically aimed gun mount. Example ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type 730 CIWS
The Type 730 is a Chinese seven-barrelled 30 mm Gatling gun/rotary cannon CIWS. It has a PLA Navy designation H/PJ12. It is mounted in an enclosed automatic turret and directed by radar, and electro-optical tracking systems. The maximum rate of fire is 5800 rd/m, and the effective range is up to 3 km. Development The is designed by the 713th research institute under the name 'Project 850' and is powered by two electric motors. The radar TR47C is a derivative of the EFR-1/LR66 J-band radar (NATO code name: Rice Lamp) by Xi'an Research Institute of Navigation Technology, but it is unclear that if this derivative is developed by the same institution. The OFC (Optical Fire Control)-3/H/ZGJ-4 electro-optical fire control system is designed by the Central China Optronic (electro-optical) Research Institute. Origin The system's primary purpose is defense against anti-ship missiles, and other precision guided weapons. However, it can also be employed against fixed/rot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mach Number
The Mach number (M or Ma), often only Mach, (; ) is a dimensionless quantity in fluid dynamics representing the ratio of flow velocity past a boundary to the local speed of sound. It is named after the Austrian physicist and philosopher Ernst Mach. \mathrm = \frac, where: * is the local Mach number, * is the local flow velocity with respect to the boundaries (either internal, such as an object immersed in the flow, or external, like a channel), and * is the speed of sound in the medium, which in air varies with the square root of the thermodynamic temperature. By definition, at Mach1, the local flow velocity is equal to the speed of sound. At Mach0.65, is 65% of the speed of sound (subsonic), and, at Mach1.35, is 35% faster than the speed of sound (supersonic). The local speed of sound, and hence the Mach number, depends on the temperature of the surrounding gas. The Mach number is primarily used to determine the approximation with which a flow can be treated as an i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anti-ship Missile
An anti-ship missile (AShM or ASM) is a guided missile that is designed for use against ships and large boats. Most anti-ship missiles are of the sea-skimming variety, and many use a combination of inertial guidance and active radar homing. A large number of other anti-ship missiles use infrared homing to follow the heat that is emitted by a ship; it is also possible for anti-ship missiles to be guided by radio command all the way. Many anti-ship missiles can be launched from a variety of weapons systems including surface warships (also referred to as ship-to-ship missiles), submarines, bombers, fighter planes, patrol planes, helicopters, shore batteries, land vehicles, and, conceivably, even infantrymen firing shoulder-launched missiles. The term surface-to-surface missile (SSM) is used when appropriate. The longer-range anti-ship missiles are often called anti-ship cruise missiles. Several countries are also developing anti-ship ballistic missiles. Etymology Both ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
