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Mil Mi-4
The Mil Mi-4 (USAF/DoD reporting name "Type 36", NATO reporting name "Hound") is a Soviet transport helicopter that served in both military and civilian roles. Design and development The Mi-4 was designed in response to the American H-19 Chickasaw and the deployment of U.S. helicopters during the Korean War. While the Mi-4 strongly resembles the H-19 Chickasaw in general layout, including the innovative engine position in front of the cockpit, it is a larger helicopter, able to lift more weight and built in larger numbers. The first model entered service in 1953. The helicopter was first displayed to the outside world in 1952 at the Soviet Aviation Day in Tushino Airfield. One Mi-4 was built with a jettisonable rotor. It served as an experimental vehicle for future pilots' means of safety and ejection designs. Operational history The Mi-4 transport helicopter laid the beginning of the Soviet Army Aviation. It was widely used both in the armed forces and in Soviet civil aviat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WikiProject Aircraft
A WikiProject, or Wikiproject, is a Wikimedia movement affinity group for contributors with shared goals. WikiProjects are prevalent within the largest wiki, Wikipedia, and exist to varying degrees within Wikimedia project, sister projects such as Wiktionary, Wikiquote, Wikidata, and Wikisource. They also exist in different languages, and translation of articles is a form of their collaboration. During the COVID-19 pandemic, CBS News noted the role of Wikipedia's WikiProject Medicine in maintaining the accuracy of articles related to the disease. Another WikiProject that has drawn attention is WikiProject Women Scientists, which was profiled by ''Smithsonian Magazine, Smithsonian'' for its efforts to improve coverage of women scientists which the profile noted had "helped increase the number of female scientists on Wikipedia from around 1,600 to over 5,000". On Wikipedia Some Wikipedia WikiProjects are substantial enough to engage in cooperative activities with outside organization ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harbin Z-6
The Harbin/CHDRI Z-6, (Z - ''Zhishengji'' - vertical take-off aircraft), is a Chinese helicopter development based on the Harbin Z-5, itself a licence-built / reverse engineered Mil Mi-4. A limited production run was terminated after performance was found to be inferior to its Z-5 progenitor (sources vary from 6 to 15 completed out of orders for 100). Design and development Through the Z-5 project the Chinese obtained valuable knowledge and experience in helicopter design and development. The Z-6 is a turboshaft powered development of the piston engine powered Z-5, the first Chinese designed turboshaft helicopter. The major difference is that the piston engine is replaced by a Dongan WZ-5 turboshaft engine, mounted above the cabin forward of the main gearbox. Development began in 1966 at the Harbin Aircraft Manufacturing Corporation (HAMC), but two years later development was moved to the newly formed Chinese Helicopter Design Research Institute (CHDRI), with HAMC still respo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mil Mi-12
The Mil V-12 (NATO reporting name: Homer), given the project number ''Izdeliye 65'' ("Item 65"), is the largest helicopter ever built. The designation "Mi-12" would have been the name for the production helicopter and was not applied to the V-12 prototypes. Design and development Design studies for a giant helicopter were started at the Mil OKB in 1959, receiving official sanction in 1961 by the GKAT (''Gosudarstvenny Komitet po Aviatsionnoy Tekhnike'' - State Committee on Aircraft Technology) instructing Mil to develop a helicopter capable of lifting . The GKAT directive was followed by a more detailed specification for the V-12 with hold dimensions similar to the Antonov An-22, intended to lift major items of combat materiel as well as 8K67, 8K75 and 8K82 inter-continental ballistic missiles (ICBM). Design limitations forced Mil to adopt a twin rotor system but design studies of a tandem layout, similar to the Boeing CH-47 Chinook, revealed major problems. The single rotor l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
YouTube
YouTube is a global online video sharing and social media platform headquartered in San Bruno, California. It was launched on February 14, 2005, by Steve Chen, Chad Hurley, and Jawed Karim. It is owned by Google, and is the second most visited website, after Google Search. YouTube has more than 2.5 billion monthly users who collectively watch more than one billion hours of videos each day. , videos were being uploaded at a rate of more than 500 hours of content per minute. In October 2006, YouTube was bought by Google for $1.65 billion. Google's ownership of YouTube expanded the site's business model, expanding from generating revenue from advertisements alone, to offering paid content such as movies and exclusive content produced by YouTube. It also offers YouTube Premium, a paid subscription option for watching content without ads. YouTube also approved creators to participate in Google's AdSense program, which seeks to generate more revenue for both parties ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bell UH-1 Iroquois
The Bell UH-1 Iroquois (nicknamed "Huey") is a utility military helicopter designed and produced by the American aerospace company Bell Helicopter. It is the first member of the prolific Huey family, as well as the first turbine-powered helicopter in service with the United States military. Development of the Iroquois started in the early 1950s, a major impetus being a requirement issued by the United States Army for a new medical evacuation and utility helicopter. The Bell 204, first flown on 20 October 1956, was warmly received, particularly for the performance of its single turboshaft engine over piston engine-powered counterparts. An initial production contract for 100 ''HU-1A''s was issued in March 1960. In response to criticisms over the rotorcraft's power, Bell quickly developed multiple models furnished with more powerful engines; in comparison to the prototype's Lycoming YT53-L-1 (LTC1B-1) engine, producing 700 shp (520 kW), by 1966, the Lycoming T53-L-13, ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sylhet
Sylhet ( bn, সিলেট) is a metropolitan city in northeastern Bangladesh. It is the administrative seat of the Sylhet Division. Located on the north bank of the Surma River at the eastern tip of Bengal, Sylhet has a subtropical climate and lush highland terrain. The city has a population of more than half a million and is one of the largest cities in Bangladesh after Dhaka, Chittagong and Khulna. Sylhet is one of Bangladesh's most important spiritual and cultural centres. Furthermore, it is one of the most economically important cities after Dhaka and Chittagong. The city produces the highest amount of tea and natural gas. The hinterland of the Sylhet valley is the largest oil and gas-producing region in Bangladesh. It is also the largest hub of tea production in Bangladesh. It is notable for its high-quality cane and agarwood. The city is served by the Osmani International Airport, named after General Bangabir M A G Osmani, the Commander-in-Chief of the Mukti B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meghna River
The Meghna River ( bn, মেঘনা নদী) is one of the major rivers in Bangladesh, one of the three that form the Ganges Delta, the largest delta on earth, which fans out to the Bay of Bengal. A part of the Surma-Meghna River System, Meghna is formed inside Bangladesh in Kishoreganj District above the town of Bhairab Bazar by the joining of the Surma and the Kushiyara, both of which originate in the hilly regions of eastern India as the Barak River. The Meghna meets its major tributary, the Padma, in Chandpur District. Other major tributaries of the Meghna include the Dhaleshwari, the Gumti, and the Feni. The Meghna empties into the Bay of Bengal in Bhola District via four principal mouths, named Tetulia (Ilsha), Shahbazpur, Hatia, and Bamni. The Meghna is the widest river among those that flow completely inside the boundaries of Bangladesh. At a point near Bhola, Meghna is 13 km wide. In its lower reaches, this river's path is almost perfectly straight ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Meghna Heli Bridge
Meghna Heli Bridge, codenamed Operation Cactus Lilly, was an aerial operation of the Indian Air Force during the Indo-Pakistani War of 1971, commencing India's involvement in Bangladesh Liberation War. It took place on 9 December, when the Indian Air Force (IAF) airlifted the IV Corps of the Indian Army and Mukti Bahini fighters from Brahmanbaria to Raipura in Narsingdi over the River Meghna, bypassing the destroyed Meghna Bridge and Pakistani defences in Ashuganj. Operation When the war broke out, ''IV corps'' went into action in the Agartala sector. At the start of the Dhaka Campaign, Dhaka was set as an objective for ''II Corps'' and ''IV Corps '' had been tasked to capture the fortress of Comilla. By 8 December, troops of the ''57 Mountain Division'' and the ''IV Corps'' had already achieved their initial objectives of occupying the territory leading up to the Meghna. The only way across the river was over the Ashuganj Bridge, which very soon became a fortress where a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indian Air Force
The Indian Air Force (IAF) is the air force, air arm of the Indian Armed Forces. Its complement of personnel and aircraft assets ranks third amongst the air forces of the world. Its primary mission is to secure Indian airspace and to conduct aerial warfare during armed conflict. It was officially established on 8 October 1932 as an auxiliary air force of the British Empire which honoured India's aviation service during World War II with the prefix ''Royal''. After India gained independence from United Kingdom in 1947, the name Royal Indian Air Force was kept and served in the name of Dominion of India. With the government's transition to a Republic in 1950, the prefix ''Royal'' was removed. Since 1950, the IAF has been involved in Indo-Pakistani Wars, four wars with neighbouring Pakistan. Other major operations undertaken by the IAF include Annexation of Goa, Operation Vijay, Operation Meghdoot, Operation Cactus and Operation Poomalai. The IAF's mission expands beyond engageme ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bangladesh Liberation War
The Bangladesh Liberation War ( bn, মুক্তিযুদ্ধ, , also known as the Bangladesh War of Independence, or simply the Liberation War in Bangladesh) was a revolution and armed conflict sparked by the rise of the Bengali nationalist and self-determination movement in East Pakistan, which resulted in the independence of Bangladesh. The war began when the Pakistani military junta based in West Pakistan—under the orders of Yahya Khan—launched Operation Searchlight against the people of East Pakistan on the night of 25 March 1971, initiating the Bangladesh genocide. In response to the violence, members of the Mukti Bahini—a guerrilla resistance movement formed by Bengali military, paramilitary and civilians—launched a mass guerrilla war against the Pakistani military, liberating numerous towns and cities in the initial months of the conflict. At first, the Pakistan Army regained momentum during the monsoon, but Bengali guerrillas counterattacked ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Albania
Albania ( ; sq, Shqipëri or ), or , also or . officially the Republic of Albania ( sq, Republika e Shqipërisë), is a country in Southeastern Europe. It is located on the Adriatic and Ionian Seas within the Mediterranean Sea and shares land borders with Montenegro to the northwest, Kosovo to the northeast, North Macedonia to the east and Greece to the south. Tirana is its capital and largest city, followed by Durrës, Vlorë, and Shkodër. Albania displays varied climatic, geological, hydrological, and morphological conditions, defined in an area of . It possesses significant diversity with the landscape ranging from the snow-capped mountains in the Albanian Alps as well as the Korab, Skanderbeg, Pindus and Ceraunian Mountains to the hot and sunny coasts of the Albanian Adriatic and Ionian Sea along the Mediterranean Sea. Albania has been inhabited by different civilisations over time, such as the Illyrians, Thracians, Greeks, Romans, Byzantines, Veneti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
