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VA-111 Shkval
The VA-111 ''Shkval'' (from , ''squall'') torpedo and its descendants are supercavitating torpedoes originally developed by the Soviet Union. They are capable of speeds in excess of 200 knots (370 km/h or 230 miles/h). Design and capabilities Design began in the 1960s when the NII-24 research institute was ordered to produce a new weapon capable of engaging nuclear submarines. The merger of the institute and GSKB-47 created the Research Institute of Applied Hydromechanics, who continued with the design and production of the Shkval. Previously operational as early as 1977, the torpedo was announced as being deployed in the 1990s. The ''Shkval'' is intended as a countermeasure against torpedoes launched by undetected enemy submarines. The VA-111 is launched from torpedo tubes at . A solid-fuel rocket accelerates it to cavitation speed, with a combined-cycle gas turbine in the nose creating the required gas bubble. Once accelerated, speed is maintained by an underwater ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Supercavitating Torpedo
A supercavitating torpedo is a torpedo using the effect of supercavitation to create a bubble around the torpedo to move at high velocity under water. Super cavitation has many variables, though. If the air stream is unstable, the torpedo could lose balance. The idea is to reduce drag on the torpedo while it sails underwater. This would make the speed greater and therefore the force of impact greater. The following is a list of supercavitating torpedoes which have been developed or are in development. * VA-111 Shkval, 1977 * Hoot, believed to be reverse-engineered from the VA-111 Shkval, 2006 * Superkavitierender Unterwasserlaufkörper (Supercavitating underwater-travelling munition) Barracuda, 2005 prototype * Unnamed prototype, mentioned 2004 * Supercavitating underwater vehicle, being developed by the ADD, undergoing trials since 2025 DARPA The Defense Advanced Research Projects Agency (DARPA) is a research and development agency of the United States Department of D ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Supercavitation
Supercavitation is the phenomenon of a cavitation bubble reducing skin friction drag on a submerged object and enabling high speeds. Applications include torpedoes and propellers, but in theory, the technique could be extended to an entire underwater vessel. Physical principle Cavitation is the formation of vapour bubbles in liquid caused by flow around an object. Bubbles form when water accelerates around sharp corners and the pressure drops below the vapour pressure. Pressure increases upon deceleration, and the water generally reabsorbs the vapour; however, vapour bubbles can implode and apply small concentrated impulses that may damage surfaces like ship propellers and pump impellers. The potential for vapour bubbles to form in a liquid is given by the nondimensional cavitation number. It equals local pressure minus vapour pressure, divided by dynamic pressure. At increasing depths (or pressures in piping), the potential for cavitation is lower because the difference ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Islamic Republic Of Iran Navy
The Islamic Republic of Iran Navy (IRIN; ), also referred as the Iranian Navy (abbreviated NEDAJA; ), is the naval warfare service branch of Iran's regular military, the Islamic Republic of Iran Army, Islamic Republic of Iran Army (''Artesh''). It is one of Iran's two maritime military branches, alongside the Navy of the Islamic Revolutionary Guard Corps, Navy of the Islamic Revolutionary Guard Corps (IRGC). NEDAJA is charged with forming Iran's first line of defense in the Gulf of Oman, Persian Gulf and abroad. It is generally considered to be a conventional green-water navy, as it mostly operates regionally, namely in the Red Sea, Mediterranean Sea, and northwest quarter of the Indian Ocean. The Navy aims to develop Blue-water navy, blue-water capabilities: in July 2016, it announced plans to establish a presence in the Atlantic Ocean, and as of May 2021 had sent ships into the region. NEDAJA shares many functions and responsibilities with the IRGC Navy, with distinctions in mi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The New York Times
''The New York Times'' (''NYT'') is an American daily newspaper based in New York City. ''The New York Times'' covers domestic, national, and international news, and publishes opinion pieces, investigative reports, and reviews. As one of the longest-running newspapers in the United States, the ''Times'' serves as one of the country's Newspaper of record, newspapers of record. , ''The New York Times'' had 9.13 million total and 8.83 million online subscribers, both by significant margins the List of newspapers in the United States, highest numbers for any newspaper in the United States; the total also included 296,330 print subscribers, making the ''Times'' the second-largest newspaper by print circulation in the United States, following ''The Wall Street Journal'', also based in New York City. ''The New York Times'' is published by the New York Times Company; since 1896, the company has been chaired by the Ochs-Sulzberger family, whose current chairman and the paper's publ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bone Cancer
A bone tumor is an neoplastic, abnormal growth of tissue in bone, traditionally classified as benign, noncancerous (benign) or malignant, cancerous (malignant). Cancerous bone tumors usually originate from a cancer in another part of the body such as from Lung cancer, lung, Breast cancer, breast, Thyroid cancer, thyroid, kidney cancer, kidney and Prostate cancer, prostate. There may be a lump, pain, or focal neurologic signs, neurological signs from pressure. A bone tumor might present with a pathologic fracture. Other symptoms may include fatigue (medical), fatigue, fever, weight loss, anemia and nausea. Sometimes there are no symptoms and the tumour is found when investigating another problem. Diagnosis is generally by Projectional radiography, X-ray and other Radiography, radiological tests such as CT scan, MRI, Positron emission tomography, PET scan and bone scintigraphy. Blood tests might include a complete blood count, inflammatory markers, Gel electrophoresis of proteins ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vladimir Putin
Vladimir Vladimirovich Putin (born 7 October 1952) is a Russian politician and former intelligence officer who has served as President of Russia since 2012, having previously served from 2000 to 2008. Putin also served as Prime Minister of Russia from 1999 to 2000 and again from 2008 to 2012. He is the longest-serving Russian president since the independence of Russia from the Soviet Union. Putin worked as a KGB foreign intelligence officer for 16 years, rising to the rank of Lieutenant colonel (Eastern Europe), lieutenant colonel. He resigned in 1991 to begin a political career in Saint Petersburg. In 1996, he moved to Moscow to join the administration of President Boris Yeltsin. He briefly served as the director of the Federal Security Service (FSB) and then as Secretary of the Security Council of Russia, secretary of the Security Council of Russia before Putin's rise to power, being appointed prime minister in August 1999. Following Yeltsin's resignation, Putin became Actin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edmond Pope
Edmond D. Pope () is a retired American intelligence officer-turned-businessman, convicted by a Russian court in 2000 on charges of spying for the U.S. Defense Intelligence Agency (DIA). He was sentenced to 20 years in prison for buying up and smuggling classified military equipment out of the country as scrap metal. 253 days into his custody, Pope was pardoned by the newly elected Russian President Vladimir Putin as US government claimed that Pope had a rare form of bone cancer. Pope has always maintained his innocence and continues to assert that the Russian authorities used him as a scapegoat for their broken system. In an interview with CNN, Pope spoke of a plot by unspecified people in the US, as well as the KGB and the Russian mafia, as a part of which Pope was being slowly poisoned in the Lefortovo Prison. Pope asserted that this was done with the hopes that he would eventually have to be transferred to a hospital, abducted on his way, and smuggled out of the country. Po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Defense Intelligence Agency
The Defense Intelligence Agency (DIA) is an intelligence agency and combat support agency of the United States Department of Defense (DoD) specializing in military intelligence. A component of the Department of Defense and the United States Intelligence Community, Intelligence Community (IC), DIA informs national civilian and Military budget of the United States, defense policymakers about the military intentions and capabilities of foreign governments and non-state actors. It also provides intelligence assistance, integration and coordination across uniformed United States Intelligence Community#Members, military service intelligence components, which remain structurally separate from DIA. The agency's role encompasses the collection and analysis of military-related foreign political, economic, industrial, geographic, and National Center for Medical Intelligence, medical and health intelligence. DIA produces approximately one-quarter of all intelligence content that goes into t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kyrgyzstan
Kyrgyzstan, officially the Kyrgyz Republic, is a landlocked country in Central Asia lying in the Tian Shan and Pamir Mountains, Pamir mountain ranges. Bishkek is the Capital city, capital and List of cities in Kyrgyzstan, largest city. Kyrgyzstan is bordered by Kazakhstan to the Kazakhstan–Kyrgyzstan border, north, Uzbekistan to the Kyrgyzstan–Uzbekistan border, west, Tajikistan to the Kyrgyzstan–Tajikistan border, south, and China to the China–Kyrgyzstan border, east and southeast. Ethnic Kyrgyz people, Kyrgyz make up the majority of the country's over 7 million people, followed by significant minorities of Uzbeks and Russians. Kyrgyzstan's history spans a variety of cultures and empires. Although geographically isolated by its highly mountainous terrain, Kyrgyzstan has been at the crossroads of several great civilizations as part of the Silk Road along with other commercial routes. Inhabited by a succession of tribes and clans, Kyrgyzstan has periodically fallen unde ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Warhead
A warhead is the section of a device that contains the explosive agent or toxic (biological, chemical, or nuclear) material that is delivered by a missile, rocket (weapon), rocket, torpedo, or bomb. Classification Types of warheads include: *Explosive material, Explosive: An explosive charge is used to disintegrate the target, and damage surrounding areas with a blast wave. **Conventional weapon, Conventional: Chemicals such as gunpowder and high explosives store significant energy within their molecular bonds. This energy can be released quickly by a trigger, such as an electric spark. Thermobaric weapons enhance the blast effect by utilizing the surrounding atmosphere in their explosive reactions. ***Blast wave, Blast: A strong shock wave is provided by the detonation of the explosive. ***Fragmentation (weaponry), Fragmentation: Metal fragments are projected at high velocity to cause damage or injury. ***Continuous-rod warhead, Continuous rod: Metal bars welded on their ends ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Terminal Guidance
In the field of weaponry, terminal guidance refers to any guidance system that is primarily or solely active during the "terminal phase", just before the weapon impacts its target. The term is generally used in reference to missile guidance systems, and specifically to missiles that use more than one guidance system through the missile's flight. Common examples include long-range air-to-air missiles that use semi-active radar homing (SARH) during most of the missile's flight, and then use an infrared seeker or active radar homing once they approach their target. Similar examples include surface-to-air missiles, anti-ballistic missiles, and some anti-tank missiles. Concept Radar beams are cone-shaped, spreading out from the diameter of the antenna at a characteristic angle that is a function of the size of the antenna and its wavelength. This means that as one moves away from the radar, its accuracy continues to degrade while the signal grows weaker. This makes it difficult ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nuclear Warhead
A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission (fission or atomic bomb) or a combination of fission and fusion reactions (thermonuclear weapon), producing a nuclear explosion. Both bomb types release large quantities of energy from relatively small amounts of matter. Nuclear bombs have had yields between 10 tons (the W54) and 50 megatons for the Tsar Bomba (see TNT equivalent). Yields in the low kilotons can devastate cities. A thermonuclear weapon weighing as little as can release energy equal to more than 1.2 megatons of TNT (5.0 PJ). Apart from the blast, effects of nuclear weapons include firestorms, extreme heat and ionizing radiation, radioactive nuclear fallout, an electromagnetic pulse, and a radar blackout. The first nuclear weapons were developed by the Allied Manhattan Project during World War II. Their production continues to require a large scientific and industrial complex, primari ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
