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Schweizer 300
The SchweizerS300 series (formerly the Hughes300, Schweizer300, and SikorskyS-300 series) is a family of light utility helicopters originally produced by Hughes Helicopters, as a development of the Hughes TH-55 Osage, Hughes 269. Later manufactured by Schweizer Aircraft, and currently produced by Schweizer RSG, the basic design has been in production for over 50 years. The piston-powered S300series features single three-bladed rotors; these helicopters tend to be used as a cost-effective platform for training and agriculture. Development Background In 1955, Hughes Tool Company's Aircraft Division (later Hughes Helicopters) carried out a market survey showing that there was a demand for a low-cost, lightweight, two-seat helicopter. The division began building the Model 269 in September 1955. The prototype flew on 2 October 1956, but it was not until 1960 that the decision was made to develop the helicopter for production. On 9 April 1959, the 269 received certification from the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WikiProject Aircraft
A WikiProject, or Wikiproject, is an affinity group for contributors with shared goals within the Wikimedia movement. WikiProjects are prevalent within the largest wiki, Wikipedia, and exist to varying degrees within Wikimedia project, sibling 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 outsi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schweizer 330
The Schweizer 330 and S333 are turbine-powered developments of the Schweizer 300 light piston-powered helicopter. As of 2007, only the Schweizer 333 remains in production. In February 2009, the 333 was rebranded as the Sikorsky S-333. In 2018 the Schweizer R.S.G. bought the Schweizer Aircraft from Sikorsky Aircraft and it was rebranded as Schweizer S333 again. Development Schweizer 330 In 1987, Schweizer announced development of the Schweizer 330 using the dynamic components, rotors, controls and systems of the 300C; however, it was redesigned with an all-new fuselage.Frawley, Gerard: ''The International Directiory of Civil Aircraft, 2003-2004'', page 190. Aerospace Publications Pty Ltd, 2003. The first 330, converted from a 300C and powered by an Allison 250-C10A, flew on June 14, 1988. The FAA certified the aircraft in September 1992. The improved 330SP was introduced in May 1997 and featured an improved rotor and raised skids, which could be retrofitted to previous 330 mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hellenic Army
The Hellenic Army (, sometimes abbreviated as ΕΣ), formed in 1828, is the army, land force of Greece. The term Names of the Greeks, '' Hellenic'' is the endogenous synonym for ''Greek''. The Hellenic Army is the largest of the three branches of the Hellenic Armed Forces, also constituted by the Hellenic Air Force (HAF) and the Hellenic Navy (HN). The army is commanded by the chief of the Hellenic Army General Staff (HAGS), which in turn is under the command of Hellenic National Defence General Staff (HNDGS). The motto of the Hellenic Army is () , from Thucydides's ''History of the Peloponnesian War, History of the Peloponnesian War (2.43.4)'', a remembrance of the ancient warriors that defended Greek lands in old times. The Hellenic Army Emblem is the two-headed eagle with a Cross, Greek Cross escutcheon in the centre. The Hellenic Army is also the main contributor to, and lead nation of, the Balkan Battle Group, a combined-arms rapid-response force under the EU Battlegroup ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Air Force Of El Salvador
The Salvadoran Air Force (, abbreviated FAS) is the air force branch of the Armed Forces of El Salvador. History Early history The Salvadoran Army Air Force was formed on 20 March 1923 during a period of heavy interest in aviation in El Salvador. In 1947, after signing the treaty of Rio (which was a mutual defense treaty among the states of America including the U.S.), El Salvador gained a new US air mission and the United States increased transfers of aircraft to the nation. Recent operations The Salvadoran Air Force first saw action in the 1969 Football War against Honduras equipped with F4U Corsairs and P-51 Mustangs. From the late 1970s, isolated guerrilla actions rapidly developed into a civil war. US aid to El Salvador in 1980 consisted of six UH-1Hs and four in 1981; they were used as gunships. Other deliveries brought that number of UH-1Hs in service up to 40. In February 1982 onwards the United States delivered eight A-37B Dragonflies, 12 UH-1Hs, four O-2A ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colombian Air Force
The Colombian Aerospace Force (FAC, ) is the air force of the Republic of Colombia. The Colombian Aerospace Force is one of the three institutions of the Military Forces of Colombia charged, according to the 1991 Constitution, with working to exercise and maintain control of Colombia's air and to defend its sovereignty, territorial integrity, and constitutional order. It is one of the largest air forces in the Americas (after the United States and Brazil) and has increased its activity due to important roles in the fight against narco-terrorism. Its main force includes 21 IAI Kfir, IAI Kfirs as defense fighters and 12 Cessna A-37 Dragonfly plus 24 Embraer 314 Super Tucano for counterinsurgency. The FAC has been used in observation and aerial combat missions since the Colombia–Peru War, Colombian-Peruvian war of 1932 and also operated during the Second World War in the islands of Archipelago of San Andrés, Providencia and Santa Catalina, San Andrés. On 8 November 2024, through ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Military Police Of Rio De Janeiro State
The Military Police of Rio de Janeiro State () (PMERJ) like other military polices in Brazil is a reserve and ancillary force of the Brazilian Army, and part of the System of Public Security and Brazilian Social Protection. Its members are called "state military" personnel. The primary mission of PMERJ is ostensively preventive policing for the maintenance of public order in the State of Rio de Janeiro. History The first militarized police in Portugal (when Brazil was still a colony) was the '' Royal Police Guard of Lisbon'' (), established in 1801, which followed the model of the National Gendarmerie () of France, created in 1791. When the Portuguese Royal Family was transferred to Brazil, the Royal Police Guard of Lisbon remained in Portugal, and another equivalent guard was created in Rio de Janeiro under the name of ''Military Division of the Royal Police Guard of Rio de Janeiro'', in 1809. With the abdication of Emperor Pedro I in 1831, the Regency restructured the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Argentine Coast Guard
The Argentine Naval Prefecture ( or PNA) is a service of Argentina's Security Ministry charged with protecting the country's rivers and maritime territory. It therefore fulfills the functions of other countries' coast guards, and furthermore acts as a gendarmerie force policing navigable rivers. According to the Argentine Constitution, the Armed Forces of the Argentine Republic cannot intervene in internal civil conflicts, so the Prefecture is defined as a civilian "security force of a military nature". It maintains a functional relationship with the Ministry of Defense, as part of both the National Defense System and the Interior Security System. It therefore maintains capabilities arising from the demands required by joint military planning with the armed forces. The PNA is a large organization for a coastguard. With a strength of 45,750 sworn members, the PNA is a larger organization than most national navies, and is in fact slightly larger than the Argentine Navy – the or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schweitzer 300CB Interior
Schweitzer is a surname. Notable people with the surname include: * Albert Schweitzer (1875–1965), German theologian, musician, physician, and medical missionary, winner of the 1952 Nobel Peace Prize * Anton Schweitzer (1735–1787), German opera composer * Brian Schweitzer (born 1955), American politician, former Governor of Montana * Dahlia Schweitzer (born 1976), American pop culture critic and chair of the Film and Media program at the Fashion Institute of Technology * Darrell Schweitzer (born 1952), American writer, editor and essayist * Douglas Schweitzer, Canadian politician * Edmund O. Schweitzer Jr., founder of E. O. Schweitzer Manufacturing * Edmund O. Schweitzer III (born 1947), American electrical engineer, inventor * George K. Schweitzer (1924–2024), American academic in chemistry and family history and local history * Georgia Schweitzer (born 1979), American collegiate and professional basketball player * Jean Baptista von Schweitzer (1833–1875), German polit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydraulics
Hydraulics () is a technology and applied science using engineering, chemistry, and other sciences involving the mechanical properties and use of liquids. At a very basic level, hydraulics is the liquid counterpart of pneumatics, which concerns gases. Fluid mechanics provides the theoretical foundation for hydraulics, which focuses on applied engineering using the properties of fluids. In its fluid power applications, hydraulics is used for the generation, control, and transmission of Power (physics), power by the use of pressure, pressurized liquids. Hydraulic topics range through some parts of science and most of engineering modules, and they cover concepts such as pipe Volumetric flow rate, flow, dam design, fluidics, and fluid control circuitry. The principles of hydraulics are in use naturally in the human body within the vascular system and erectile tissue. ''Free surface hydraulics'' is the branch of hydraulics dealing with free surface flow, such as occurring in rivers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tail Rotor
The tail rotor is a smaller rotor mounted vertically or near-vertically at the tail of a traditional single-rotor helicopter, where it rotates to generate a propeller-like horizontal thrust in the same direction as the main rotor's rotation. The tail rotor's position and distance from the helicopter's center of mass allow it to develop enough thrust leverage to counter the reactional torque exerted on the fuselage by the spinning of the main rotor. Without the tail rotor or other anti-torque mechanisms (e.g. NOTAR), the helicopter would be constantly spinning in the opposite direction of the main rotor when flying. Tail rotors are simpler than main rotors since they require only collective changes in pitch to vary thrust. The pitch of the tail rotor blades is adjustable by the pilot via the anti-torque pedals, which also provide directional control by allowing the pilot to rotate the helicopter around its vertical axis. Its drive system consists of a shaft powered from ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helicopter Rotor
On a helicopter, the main rotor or rotor system is the combination of several rotary wings (rotor blades) with a control system, that generates the aerodynamic lift (force), lift force that supports the weight of the helicopter, and the thrust that counteracts aerodynamic drag in forward flight. Each main rotor is mounted on a vertical mast over the top of the helicopter, as opposed to a helicopter tail rotor, which connects through a combination of drive shaft(s) and gearboxes along the tail boom. The blade pitch is typically controlled by the pilot using the helicopter flight controls. Helicopters are one example of rotary-wing aircraft (rotorcraft). The name is derived from the Greek words ''helix'', helik-, meaning spiral; and ''pteron'' meaning wing. Design principles Overview The helicopter rotor is powered by the engine, through the transmission, to the rotating mast. The mast is a cylindrical metal shaft that extends upward from—and is driven by—the transmission. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
